java.lang.NumberFormatException is there a better way around this issure?

java.lang.NumberFormatException is there a better way around this issure? - android

Here is my Java file for my app that I am working on. The in logcat it is saying there is an error in the initvar() method in this line "length1et = (EditText) findViewById(R.id.etlength1);" I know this is because there is not a variable in the edittext box and I have had this problem before and just put 0's there to start out. Is there a simple command to have nothing there and it will just understand to automatically put in a 0 for the value or is the only way to write some code to treat it as a zero? Below the java code is the xml if that is necessary. In a previous app I have just had it read the edittext box and if nothing is there, set the value to 0 before it does anything else. For the record I know I don't have a button to call the calculate() method I just haven't put that in yet.
package com.example.constructioncalculator;
import android.app.Activity;
import android.os.Bundle;
import android.widget.EditText;
public class Paint extends Activity {
int numwin, numdoor;
double areadoor, areawin, lengthft, lengthin, widthft, widthin, heightft,
heightin, areawall, areaceil, paintcon, paintneeded;
EditText length1et, length2et, width1et, width2et, height1et, height2et,
paintconet, paintneededet;
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.paintdisp);
initvar();
calculate();
output();
}
private void initvar() {
// TODO Auto-generated method stub
numwin = 0;
numdoor = 0;
areawin = 20;
areadoor = 19.5;
lengthft = 0;
lengthin = 0;
widthft = 0;
widthin = 0;
heightft = 0;
heightin = 0;
areawall = 0;
areaceil = 0;
paintcon = 0;
paintneeded = 0;
length1et = (EditText) findViewById(R.id.etlength1);
length2et = (EditText) findViewById(R.id.etlength2);
width1et = (EditText) findViewById(R.id.etwidth1);
width2et = (EditText) findViewById(R.id.etwidth2);
height1et = (EditText) findViewById(R.id.etheight1);
height2et = (EditText) findViewById(R.id.etheight2);
paintconet = (EditText) findViewById(R.id.etpaintcon);
paintneededet = (EditText) findViewById(R.id.etpaintneeded);
}
private void calculate() {
// TODO Auto-generated method stub
lengthft = Double.parseDouble(length1et.getText().toString());
lengthin = Double.parseDouble(length2et.getText().toString());
widthft = Double.parseDouble(width1et.getText().toString());
widthin = Double.parseDouble(width2et.getText().toString());
heightft = Double.parseDouble(height1et.getText().toString());
heightin = Double.parseDouble(height2et.getText().toString());
paintcon = Double.parseDouble(paintconet.getText().toString());
areaceil = (lengthft + lengthin / 12) * (widthft + widthin / 12);
areawall = areaceil * (heightft + heightin / 12) - (numwin * areawin)
- (numdoor * areadoor);
paintneeded = (areawall / paintcon) * 1.1;
}
private void output() {
// TODO Auto-generated method stub
paintneededet.setText(String.valueOf(paintneeded));
}
}
*********Here is my xml file...
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/TextView04"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:text="Paint Coverage Estimator"
android:textSize="30dp" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="#+id/editText1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:text="#string/paintinst" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/tvlength"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:text="Length"
android:textSize="20dp" />
<TextView
android:id="#+id/tvwidth"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:text="Width"
android:textSize="20dp" />
<TextView
android:id="#+id/tvheight"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:text="Height"
android:textSize="20dp" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<EditText
android:id="#+id/etlength1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:hint="feet"
android:text="1"
android:textSize="10dp" />
<EditText
android:id="#+id/etlength2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:hint="inches"
android:text="1"
android:textSize="10dp" />
<EditText
android:id="#+id/etwidth1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:hint="feet"
android:text="1"
android:textSize="10dp" />
<EditText
android:id="#+id/etwidth2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:hint="inches"
android:text="1"
android:textSize="10dp" />
<EditText
android:id="#+id/etheight1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:hint="feet"
android:text="1"
android:textSize="10dp" />
<EditText
android:id="#+id/etheight2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:gravity="center"
android:hint="inches"
android:text="1"
android:textSize="10dp" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/editText2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="approx paint coverage (ft^2)?" />
<EditText
android:id="#+id/etpaintcon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="300" >
<requestFocus />
</EditText>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/editText3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Paint needed of your buckets" />
<EditText
android:id="#+id/etpaintneeded"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="" />
</LinearLayout>
</LinearLayout>
</LinearLayout>

Try this:
lengthft = Double.parseDouble(length1et.getText().toString()+0);
But be aware, if the user type in a invalid number and click on the button you haven't implemented yet, your app will crash. So you should probably add a check to all the EditText's before you call calculate().
Or even better, add a function to do it for you:
lengthft = getDouble(length1et);
public double getDouble(EditText et) {
if (!et.getText().equals(null)) {
return Double.parseDouble(et.getText().toString()); //convert your string into integer
} else {
return 0; // or what you want to return if string is Null
}
}

Related

How to create a 3*3 Matrix Grid in android

I want to make a simple Sudoku game in which i want to create 3*3 matrix.I created a matrix but i getting problem how to insert some value at specific position in Grid Layout.Please can anyone help me.
I have done up to this so far...
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mScrollView = (ScrollView) findViewById(R.id.scroll_view);
mScrollView.setSmoothScrollingEnabled(true);
mGrid = (GridLayout) findViewById(R.id.grid_layout);
// mGrid.setOnDragListener(new DragListener());
final LayoutInflater inflater = LayoutInflater.from(this);
for (int i = 0; i < NBR_ITEMS; i++) {
final View itemView = inflater.inflate(R.layout.item_grid, mGrid, false);
final TextView text = (TextView) itemView.findViewById(R.id.text);
if ((i == 4)) {
text.setText("3");
}
if ((i == 2)) {
text.setText("2");
}
if ((i == 7)) {
text.setText("1");
}
final int size = mGrid.getChildCount();
System.out.println("size===" + size);
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
final int index = calculateNewIndex(itemView.getX(), itemView.getY());
System.out.println("index====" + index);
System.out.println("click on cell");
}
});
// itemView.setOnLongClickListener(new LongPressListener());
mGrid.addView(itemView);
}
}

Simply you can create 3*3 matrix using LinearLayout and do wahtever you want like this,
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:weightSum="1"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight=".33"
android:orientation="horizontal"
android:weightSum="1"
>
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight=".33"
android:text="1"
android:gravity="center"
android:textSize="24sp"
/>
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight=".33"
android:text="2"
android:gravity="center"
android:textSize="24sp"
/>
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight=".33"
android:text="3"
android:gravity="center"
android:textSize="24sp"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight=".33"
android:orientation="horizontal"
android:weightSum="1"
>
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight=".33"
android:text="4"
android:gravity="center"
android:textSize="24sp"
/>
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight=".33"
android:text="5"
android:gravity="center"
android:textSize="24sp"
/>
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight=".33"
android:text="6"
android:gravity="center"
android:textSize="24sp"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight=".33"
android:orientation="horizontal"
android:weightSum="1"
>
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight=".33"
android:text="7"
android:gravity="center"
android:textSize="24sp"
/>
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight=".33"
android:text="8"
android:gravity="center"
android:textSize="24sp"
/>
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight=".33"
android:text="9"
android:gravity="center"
android:textSize="24sp"
/>
</LinearLayout>
</LinearLayout>
Like This

How to position an ImageView in the same place in different screen sizes?

I been working on a simple android app that calculates a person's Body Mass Index, I have all the features working but positioning the arrow in the right place in the color bar corresponding to the user's screen size is what Im stuck on. I have it working by setting the X and Y values of the arrow ImageView but obviously the place of the arrow changes when i test my application in different screen sizes even though im coverting a dp value to pixels. How can I position the arrow ImageView so that it stays the same in different screen sizes?
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context="coding.guillermo.bmiapp.MainActivity2"
tools:showIn="#layout/activity_main2"
android:clickable="false"
android:background="#ffffff"
android:id="#+id/relativeLayout">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="BMI"
android:id="#+id/bmiText"
android:textSize="25dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="21.24"
android:id="#+id/bmiResult"
android:textSize="30dp"
android:layout_below="#+id/bmiText"
android:layout_centerHorizontal="true"
android:layout_marginTop="22dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/bmiCategory"
android:textSize="25dp"
android:text="Normal weight"
android:layout_marginTop="22dp"
android:layout_below="#+id/bmiResult"
android:layout_centerHorizontal="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Save result"
android:id="#+id/saveButton"
android:backgroundTint="#color/toolBarColor"
android:textColor="#ffffff"
android:layout_marginBottom="20dp"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="BMI Log"
android:id="#+id/trackerButton2"
android:backgroundTint="#color/toolBarColor"
android:textColor="#ffffff"
android:layout_alignTop="#+id/saveButton" />
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/imageView"
android:background="#drawable/bmibar"
android:layout_marginTop="36dp"
android:layout_below="#+id/bmiCategory" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Underweight <18.50 "
android:id="#+id/underweightText"
android:textSize="22sp"
android:layout_below="#+id/imageView"
android:layout_centerHorizontal="true"
android:layout_marginTop="33dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Normal 18.5 - 24.99"
android:id="#+id/normalText"
android:textSize="22sp"
android:paddingTop="5dp"
android:layout_below="#+id/underweightText"
android:layout_alignStart="#+id/underweightText" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Overweight >=25.00"
android:id="#+id/overweightText"
android:layout_below="#+id/normalText"
android:textSize="22sp"
android:paddingTop="5dp"
android:layout_alignStart="#+id/normalText" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Obese >=30.00"
android:id="#+id/obeseText"
android:textSize="22sp"
android:paddingTop="5dp"
android:layout_below="#+id/overweightText"
android:layout_alignStart="#+id/overweightText" />
public class MainActivity2 extends AppCompatActivity {
TextView resultText,bmiLabel,underWeightText,normalText,overweightText,obeseText;
RelativeLayout.LayoutParams params;
Button saveButton,trackerButton;
Result result;
EditText userName;
DBhandler dbHandler;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
// TextViews
resultText = (TextView) findViewById(R.id.bmiResult);
bmiLabel = (TextView) findViewById(R.id.bmiCategory);
underWeightText = (TextView) findViewById(R.id.underweightText);
normalText = (TextView) findViewById(R.id.normalText);
overweightText = (TextView) findViewById(R.id.overweightText);
obeseText = (TextView) findViewById(R.id.obeseText);
// Button
saveButton = (Button) findViewById(R.id.saveButton);
trackerButton = (Button) findViewById(R.id.trackerButton2);
// Getting User object from the previous activity
result = (Result) getIntent().getParcelableExtra("result");
// Database
dbHandler = new DBhandler(this);
// Displaying the arrow in the corresponding place
ImageView arrow = new ImageView(this);
params = new RelativeLayout.LayoutParams(80,80);
arrow.setImageResource(R.drawable.arrow2);
RelativeLayout rl = (RelativeLayout) findViewById(R.id.relativeLayout);
// the display of the arrow is different when tested in device's with different screen sizes
int dpValue = 0;
int dpValue2 = 166;
float d = getApplicationContext().getResources().getDisplayMetrics().density;
int margin = (int)(dpValue * d);
int margin2 = (int) (dpValue2 * d);
arrow.setX(margin);
arrow.setY(margin2);
rl.addView(arrow);
// BMI diplay
resultText.setText(Double.toString(result.getBMI()));
bmiLabel.setText(result.getBmiCategory());
// BMI category bold display
bmiCategoryBold(result.getBMI());
// Saving result to internal storage for later retrieval
saveButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
View view = (LayoutInflater.from(MainActivity2.this)).inflate(R.layout.alert_content,null);
AlertDialog.Builder alertBuilder = new AlertDialog.Builder(MainActivity2.this);
alertBuilder.setView(view);
userName = (EditText) view.findViewById(R.id.nameInput);
SimpleDateFormat dateFormat = new SimpleDateFormat("MM/dd/yyyy");
String date = dateFormat.format(new Date());
result.setDate(date);
alertBuilder.setCancelable(true).setPositiveButton("Ok", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
result.setName(userName.getText().toString());
// adding result to the SQLite database
dbHandler.addResult(result);
Toast toast = Toast.makeText(getApplicationContext(),"result saved",Toast.LENGTH_SHORT);
toast.show();
}
});
AlertDialog dialog = alertBuilder.create();
dialog.show();
Button nButton = dialog.getButton(DialogInterface.BUTTON_POSITIVE);
nButton.setBackgroundColor(getResources().getColor(R.color.toolBarColor));
nButton.setTextColor(Color.WHITE);
}
});
trackerButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(getApplicationContext(),MainActivity3.class);
startActivity(intent);
}
});
}
public void bmiCategoryBold(double bmi){
if(bmi < 18.50){
underWeightText.setTypeface(null, Typeface.BOLD);
}
else if(bmi <= 24.99){
normalText.setTypeface(null,Typeface.BOLD);
}
else if(bmi<=29.99){
overweightText.setTypeface(null,Typeface.BOLD);
}
else{
obeseText.setTypeface(null,Typeface.BOLD);
}
}
}
The first pic is the app running on 1080 pixels by 1920 pixels screen and the second is a 1440 pixels by 2560 pixels screen
first pic
second pic

Add Linearlayout as subparent of childview,use its orientation and gravity attribute you can easily get the design in more optimize way and suitable for everyscreen size.
here i have used RelativeLayout as Parent and LinearLayout as sub-parent of childview.
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical"
android:padding="10dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical">
<TextView
android:id="#+id/bmiText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="BMI"
android:textSize="25dp" />
<TextView
android:id="#+id/bmiResult"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp"
android:text="21.24"
android:textSize="30dp" />
<TextView
android:id="#+id/bmiCategory"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Normal weight"
android:textSize="25dp" />
</LinearLayout>
<ImageView
android:id="#+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#mipmap/ic_launcher" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:orientation="vertical"
android:padding="5dp">
<TextView
android:id="#+id/underweightText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:text="Underweight <18.50 "
android:textSize="22sp" />
<TextView
android:id="#+id/normalText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:text="Normal 18.5 - 24.99"
android:textSize="22sp" />
<TextView
android:id="#+id/overweightText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:text="Overweight >=25.00"
android:textSize="22sp" />
<TextView
android:id="#+id/obeseText"
android:layout_width="wrap_content"
android:padding="10dp"
android:layout_height="wrap_content"
android:text="Obese >=30.00"
android:textSize="22sp" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:orientation="horizontal"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="match_parent"
android:gravity="left"
android:layout_height="wrap_content">
<Button
android:id="#+id/trackerButton2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:backgroundTint="#000000"
android:text="BMI Log"
android:gravity="center"
android:textColor="#ffffff" />
<LinearLayout
android:layout_width="match_parent"
android:gravity="right"
android:layout_height="wrap_content">
<Button
android:id="#+id/saveButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:backgroundTint="#000000"
android:text="Save result"
android:textColor="#ffffff" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
</LinearLayout>
</RelativeLayout>
Try to avoid too much margin top and bottom.

add blink to customized listview Item?

i have created a listview contains multiple items, and i added a border to those items so it would look like this:
because of this customized border the original blink of an item get blocked so it doesn't appear, and i've tried to add a blink through animation but there is too much delay and too much work on the main thread, i also used animation inside threads but it is the same with the delay thing, which force me to forget about animation so is there anyway that i can make the item blink when its clicked without using animation or with using it but in an efficient way and by the way i used blink animation inside my onItemClickListener you can find it in the code below:
onItemClickListener that handle the blink:
dataList.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, final View arg1,
final int arg2, long arg3) {
// TODO Auto-generated method stub
tvWarningNoEmp.setVisibility(View.GONE);
// adding blink
final Animation animation = new AlphaAnimation(
1, 0); // Change
// alpha
// from
// fully
// visible
// to
// invisible
animation.setDuration(100); // duration - half a
// second
animation
.setInterpolator(new LinearInterpolator()); // do
// not
// alter
// animation
// rate
animation.setRepeatCount(Animation.INFINITE); // Repeat
// animation
// infinitely
animation.setRepeatMode(Animation.REVERSE);
arg1.startAnimation(animation);
// blink one time timer
new CountDownTimer(100, 100) {// CountDownTimer(edittext1.getText()+edittext2.getText())
// also parse it to long
public void onTick(long millisUntilFinished) {
// here you can have your logic to set text to
// edittext
}
public void onFinish() {
arg1.clearAnimation();
}
}.start();
// set margins for tickets buttons
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
params.setMargins(0, 0, 30, 0);
bAssign.setLayoutParams(params);
LinearLayout.LayoutParams paramsO = new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
paramsO.setMargins(110, 0, 0, 0);
bEmpChat.setLayoutParams(paramsO);
noEmpLayout.setVisibility(LinearLayout.GONE);
empLayout.setVisibility(LinearLayout.VISIBLE);
Employee item = adapter.getItem(arg2);
ivEmpIcon.setBackgroundResource(R.drawable.free);
tvEmpName.setText(" " + item.getEmpName());
tvEmpDetails.setText(" " + item.getEmpDetails());
empLongitude = item.getEmpLongitude();
empLatitude = item.getEmpLatitude();
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(new LatLng(empLatitude, empLongitude))
.zoom(15).build();
googleEmpMap.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraPosition));
MarkerOptions marker = new MarkerOptions().position(
new LatLng(empLatitude, empLongitude)).title(
tvEmpName.getText().toString());
marker.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_RED));
googleEmpMap.addMarker(marker);
// based on item add info to intent
// hide button directions
bEmpDirections.setVisibility(View.GONE);
// current address
Geocoder geocoder;
List<Address> addresses;
geocoder = new Geocoder(getApplicationContext(), Locale
.getDefault());
try {
addresses = geocoder.getFromLocation(empLatitude,
empLongitude, 1);
String street = addresses.get(0).getAddressLine(0);
String state = addresses.get(0).getAdminArea();
String country = addresses.get(0).getCountryName();
tvEmpCurrentAdd.setText(" " + country + "-" + state
+ "-" + street + " st.");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();}
}
});
ListView Layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/redborder" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
>
<Button
android:id="#+id/btnBack"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="5dp"
android:background="#drawable/back" />
<TextView
android:id="#+id/tvWarningNoEmp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="choose an employee from here to assign this problem to!"
android:textColor="#FF0000"
android:layout_marginLeft="400dp"
android:visibility="gone"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="40dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:layout_weight="2"
android:background="#drawable/pepsiborder"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:background="#drawable/blueborder"
android:orientation="horizontal"
android:padding="10dp" >
<ImageView
android:id="#+id/TicketIcon"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_gravity="center_vertical"
android:layout_weight="0.1" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="0.7"
android:gravity="center_vertical"
android:orientation="vertical" >
<TextView
android:id="#+id/ticketCat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="7dp"
android:gravity="center_vertical"
android:textColor="#D3D9FF"
android:textSize="17sp" />
</LinearLayout>
</LinearLayout>
<fragment
android:id="#+id/ticketMap"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_marginBottom="10dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp" />
<ScrollView
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:orientation="vertical" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="State:"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#D3D9FF" />
<TextView
android:id="#+id/ticketState"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textColor="#D3D9FF" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Ticket No:"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#D3D9FF" />
<TextView
android:id="#+id/ticketNo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textColor="#D3D9FF" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/textView12"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Report Date:"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#D3D9FF" />
<TextView
android:id="#+id/ticketReportDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textColor="#D3D9FF" />
</LinearLayout>
<TextView
android:id="#+id/textView13"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Details:"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#D3D9FF" />
<TextView
android:id="#+id/ticketDetails"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textColor="#D3D9FF" />
</LinearLayout>
</ScrollView>
<LinearLayout
android:id="#+id/llBtn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:layout_marginBottom="10dp"
android:layout_marginTop="170dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#drawable/blueborder"
android:orientation="horizontal"
android:padding="10dp" >
<Button
android:id="#+id/btnTicketDirections"
android:layout_width="match_parent"
android:layout_height="30dp"
android:layout_weight="1"
android:background="#drawable/directions" />
<Button
android:id="#+id/btnSolve"
android:layout_width="match_parent"
android:layout_height="30dp"
android:layout_weight="1"
android:background="#drawable/solve" />
<Button
android:id="#+id/btnOther"
android:layout_width="match_parent"
android:layout_height="30dp"
android:layout_weight="1"
android:background="#drawable/other" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:id="#+id/llListView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="40dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:layout_weight="2"
android:background="#drawable/pepsiborder"
android:orientation="vertical" >
<TextView
android:id="#+id/textView124"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#D3D9FF"
android:text="Free Employees"
android:textSize="30sp"
android:gravity="left"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:textAppearance="?android:attr/textAppearanceLarge" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_marginLeft="20dp"
>
<ListView
android:id="#+id/listTic"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginRight="5dp"
android:layout_marginTop="20dp"
android:divider="#android:color/transparent"
android:dividerHeight="10dp" >
</ListView>
</LinearLayout>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="10dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:layout_weight="2"
android:id="#+id/noempLayout"
android:background="#android:color/transparent"
android:orientation="vertical" >
<TextView
android:text="Please select free Employee to handle this problem!"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:layout_marginTop="300dp"
/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginBottom="40dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:layout_weight="2"
android:id="#+id/empLayout"
android:background="#drawable/pepsiborder"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp"
android:background="#drawable/blueborder"
android:orientation="horizontal"
android:padding="10dp" >
<ImageView
android:id="#+id/empIcon"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_gravity="center_vertical"
android:layout_weight="0.1" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="0.7"
android:gravity="center_vertical"
android:orientation="vertical" >
<TextView
android:id="#+id/empName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:layout_marginLeft="7dp"
android:gravity="center_vertical"
android:textColor="#D3D9FF"
android:textSize="17sp" />
</LinearLayout>
</LinearLayout>
<fragment
android:id="#+id/empMap"
android:name="com.google.android.gms.maps.MapFragment"
android:layout_width="match_parent"
android:layout_height="200dp"
android:layout_marginBottom="10dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="10dp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="10dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:orientation="vertical" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/textView33"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Current Address:"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#D3D9FF" />
<TextView
android:id="#+id/empAddress"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textColor="#D3D9FF" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/textView22"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Details:"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#D3D9FF" />
<TextView
android:id="#+id/empDetails"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=""
android:textColor="#D3D9FF" />
</LinearLayout>
</LinearLayout>
<LinearLayout
android:id="#+id/llBtn2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:layout_marginTop="220dp"
android:layout_marginBottom="10dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#drawable/blueborder"
android:orientation="horizontal"
android:padding="10dp" >
<Button
android:id="#+id/btnEmpDirections"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_weight="1"
android:layout_gravity="center"
android:background="#drawable/directions" />
<Button
android:id="#+id/btnEmpChat"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_weight="1"
android:layout_gravity="center"
android:background="#drawable/chat" />
<Button
android:id="#+id/btnEmpAssign"
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_weight="1"
android:layout_gravity="center"
android:background="#drawable/assign" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
</LinearLayout>
</LinearLayout>
ListView Item Layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="280dp"
android:layout_height="90dp"
android:orientation="horizontal"
android:background="#drawable/border"
android:layout_marginTop="10dp"
android:padding="10dp"
>
<ImageView
android:id="#+id/imgIcon"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_weight="0.1"
android:gravity="center_vertical"
/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:layout_weight="0.7"
android:gravity="center_vertical"
>
<TextView
android:id="#+id/txtTitle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:textSize="17sp"
android:textColor="#D3D9FF"
android:layout_gravity="center_vertical"
android:layout_marginLeft="7dp"
/>
<TextView
android:id="#+id/txtTitle1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:layout_gravity="center_vertical"
android:textSize="13sp"
android:textColor="#D3D9FF"
android:layout_marginLeft="7dp"
/>
</LinearLayout>
</LinearLayout>
Border.xml:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle"
>
<stroke
android:width="2dip"
android:color="#8D8D8D" />
<corners android:radius="10dip"/>
<solid android:color="#464A4F" />
</shape>
any help is truly appreciated.

If you want a view to blink:
public void blink(final View v) {
v.setBackgroundColor(Color.DKGRAY);
v.animate().setDuration(25).alpha(0).withEndAction(new Runnable() {
#Override
public void run() {
v.setBackgroundResource(R.drawable.standard_key_normal);
v.setAlpha(1);
}
});
}
Send your View to this function, replace the background with whatever drawable or color resource you want. If you want multiple blinks put it in a for loop.

well i figure out how to reduce the delay and add blink effect without using animation and some how it worked for me and there is no more delay, what i did is I've changed the list's linear layouts to relative and that reduced the amount of nested layouts significantly then i added this method:
private void blink(final View v){
final Handler handler = new Handler();
new Thread(new Runnable() {
#Override
public void run() {
int timeToBlink = 1000; //in milissegunds
try{Thread.sleep(timeToBlink);}catch (Exception e) {}
handler.post(new Runnable() {
#Override
public void run() {
if(v == View.VISIBLE){
v.setVisibility(View.INVISIBLE);
}else{
v.setVisibility(View.VISIBLE);
}
blink();
}
});
}
}).start();
then i used it inside onItemClickListener() --> blink(arg1);
worked perfectly for me, also getting the current address was taking too much so i used Async so now there is no delay at all:
Async used as an inner class:
private class LongOperation extends AsyncTask<String, Void, String> {
String all;
#Override
protected String doInBackground(String... params) {
// current address
Geocoder geocoder;
List<Address> addresses;
geocoder = new Geocoder(getApplicationContext(), Locale
.getDefault());
try {
addresses = geocoder.getFromLocation(empLatitude,
empLongitude, 1);
String street = addresses.get(0).getAddressLine(0);
String state = addresses.get(0).getAdminArea();
String country = addresses.get(0).getCountryName();
all="" + country + "-" + state
+ "-" + street + " st.";
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();}
return all;
}
#Override
protected void onPostExecute(String result) {
tvEmpCurrentAdd.setText(all);
}
#Override
protected void onPreExecute() {}
#Override
protected void onProgressUpdate(Void... values) {}
}
and then i called it inside onItemClickListener:
new LongOperation().execute();
hope this will help others that had simillar problem.

half or quarter black screen in android

I have an android activity that when I launch sometimes (about 1 in 4 times) it only draws quarter or half the screen before showing it. When I change the orientation or press a button the screen draws properly.
I'm just using TextViews, Buttons, Fonts - no drawing or anything like that.
All of my code for initialising is in the onCreate(). In this method I'm loading a text file, of about 40 lines long, and also getting a shared preference. Could this cause a delay so that it can't draw the intent?
Thanks in advance if anyone has seen anything similar.
EDIT - I tried commenting out the loading of the word list, but it didn't fix the problem.
EDIT 2 - I didn't manage to resolve the problem, but managed to improve it by adding a timer right at the end of the onCreate. I set a low refresh rate and in the tick changed the text of one of the controls. This then seemed to redraw the screen and get rid of the black portions of the screen.
Here is the activity
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/mainRelativeLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/blue_abstract_background" >
<RelativeLayout
android:id="#+id/relativeScore"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal" >
<TextView
android:id="#+id/ScoreLabel"
style="#style/yellowShadowText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:padding="10dip"
android:text="SCORE:"
android:textSize="18dp" />
/>
<TextView
android:id="#+id/ScoreText"
style="#style/yellowShadowText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toRightOf="#id/ScoreLabel"
android:padding="5dip"
android:text="0"
android:textSize="18dp" />
<TextView
android:id="#+id/GameTimerText"
style="#style/yellowShadowText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:minWidth="25dp"
android:text="0"
android:textSize="18dp" />
<TextView
android:id="#+id/GameTimerLabel"
style="#style/yellowShadowText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:layout_toLeftOf="#id/GameTimerText"
android:padding="10dip"
android:text="TIMER:"
android:textSize="18dp" />
/>
</RelativeLayout>
<RelativeLayout
android:id="#+id/relativeHighScore"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="#id/relativeScore" >
<TextView
android:id="#+id/HighScoreLabel"
style="#style/yellowShadowText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:padding="10dip"
android:text="HIGH SCORE:"
android:textSize="16dp" />
<TextView
android:id="#+id/HighScoreText"
style="#style/yellowShadowText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/HighScoreLabel"
android:padding="10dip"
android:text="0"
android:textSize="16dp" />
</RelativeLayout>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:layout_below="#+id/relativeHighScore"
android:orientation="vertical" >
<LinearLayout
android:id="#+id/linearMissing"
android:layout_width="fill_parent"
android:layout_height="80dp"
android:layout_gravity="center"
android:orientation="vertical" >
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:background="#color/yellow_text" />
<TextView
android:id="#+id/MissingWordText"
style="#style/yellowShadowText"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_gravity="center_horizontal"
android:layout_marginTop="25dp"
android:text="MSSNG WRD"
android:textSize="22dp"
android:typeface="normal" />
</LinearLayout>
<View
android:layout_width="match_parent"
android:layout_height="2dp"
android:background="#color/yellow_text" />
<TableLayout
android:id="#+id/buttonsTableLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<TableRow
android:id="#+id/tableRow3"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal"
android:paddingTop="5dp" >
<Button
android:id="#+id/aVowelButton"
android:layout_width="66dp"
android:layout_height="66dp"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="10dp"
android:layout_marginRight="5dp"
android:background="#drawable/blue_vowel_button"
android:text="#string/a"
android:textColor="#color/yellow_text"
android:textSize="30dp" />
<Button
android:id="#+id/eVowelButton"
android:layout_width="66dp"
android:layout_height="66dp"
android:layout_gravity="center_horizontal"
android:layout_marginBottom="10dp"
android:layout_marginRight="5dp"
android:background="#drawable/blue_vowel_button"
android:text="#string/e"
android:textColor="#color/yellow_text"
android:textSize="30dp" />
</TableRow>
<TableRow
android:id="#+id/tableRow4"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center_horizontal" >
<Button
android:id="#+id/iVowelButton"
android:layout_width="66dp"
android:layout_height="66dp"
android:layout_gravity="center_horizontal"
android:layout_margin="5dp"
android:background="#drawable/blue_vowel_buttoni"
android:text="#string/i"
android:textColor="#color/yellow_text"
android:textSize="30dp" />
<Button
android:id="#+id/oVowelButton"
android:layout_width="66dp"
android:layout_height="66dp"
android:layout_gravity="center_horizontal"
android:layout_margin="5dp"
android:background="#drawable/blue_vowel_button"
android:text="#string/o"
android:textColor="#color/yellow_text"
android:textSize="30dp" />
<Button
android:id="#+id/uVowelButton"
android:layout_width="66dp"
android:layout_height="66dp"
android:layout_gravity="center_horizontal"
android:layout_margin="5dp"
android:background="#drawable/blue_vowel_button"
android:text="#string/u"
android:textColor="#color/yellow_text"
android:textSize="30dp" />
</TableRow>
</TableLayout>
<TextView
android:id="#+id/TimeToStartText"
style="#style/yellowShadowText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textSize="24dp" />
<Button
android:id="#+id/startButton"
style="#style/yellowShadowText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="10dp"
android:background="#drawable/blue_button_menu"
android:gravity="center"
android:padding="10dip"
android:text="START!"
android:textSize="28dp" />
</LinearLayout>
</RelativeLayout>
And the OnCreate() and a few methods:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_game);
isNewWord = true;
m_gameScore = 0;
m_category = getCategoryFromExtras();
// loadWordList(m_category);
initialiseTextViewField();
loadHighScoreAndDifficulty();
setFonts();
setButtons();
setStartButton();
enableDisableButtons(false);
}
private void loadHighScoreAndDifficulty() {
//setting preferences
SharedPreferences prefs = this.getSharedPreferences(m_category, Context.MODE_PRIVATE);
int score = prefs.getInt(m_category, 0); //0 is the default value
m_highScore = score;
m_highScoreText.setText(String.valueOf(m_highScore));
prefs = this.getSharedPreferences(DIFFICULTY, Context.MODE_PRIVATE);
m_difficulty = prefs.getString(DIFFICULTY, NRML_DIFFICULTY);
}
private void initialiseTextViewField() {
m_startButton = (Button) findViewById(R.id.startButton);
m_missingWordText = (TextView) findViewById(R.id.MissingWordText);
m_gameScoreText = (TextView) findViewById(R.id.ScoreText);
m_gameScoreLabel = (TextView) findViewById(R.id.ScoreLabel);
m_gameTimerText = (TextView) findViewById(R.id.GameTimerText);
m_gameTimerLabel = (TextView) findViewById(R.id.GameTimerLabel);
m_timeToStartText = (TextView) findViewById(R.id.TimeToStartText);
m_highScoreLabel = (TextView) findViewById(R.id.HighScoreLabel);
m_highScoreText = (TextView) findViewById(R.id.HighScoreText);
}
private String getCategoryFromExtras() {
String category = "";
Bundle extras = getIntent().getExtras();
if (extras != null) {
category = extras.getString("category");
}
return category;
}
private void enableDisableButtons(boolean enable) {
Button button = (Button) findViewById(R.id.aVowelButton);
button.setEnabled(enable);
button = (Button) findViewById(R.id.eVowelButton);
button.setEnabled(enable);
button = (Button) findViewById(R.id.iVowelButton);
button.setEnabled(enable);
button = (Button) findViewById(R.id.oVowelButton);
button.setEnabled(enable);
button = (Button) findViewById(R.id.uVowelButton);
button.setEnabled(enable);
}
private void setStartButton() {
m_startButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
m_gameScore = 0;
updateScore();
m_startButton.setVisibility(View.GONE);
m_timeToStartText.setVisibility(View.VISIBLE);
startPreTimer();
}
});
}

Problems from Editable (EditText) to Integers

I am having problems getting the integer values for a simple math program out of the edittext boxes. I can get a string out of it but when I try to convert it to a integer it crashes. I have tried:
int a = Intger.parseInt(X2.getText().toString());
and it still crashes. Any idea's would be greatly appreciated.
Here is source code.
package siu.edu.cs215;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.*;
public class Quadratic extends Activity {
private TextView answer;
private EditText X2, X, K;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.quad);
Button1 = (Button)findViewById(R.id.quad);
Button2 = (Button)findViewById(R.id.backwards);
answer = (TextView)findViewById(R.id.B1);
X2 = (EditText)findViewById(R.id.xsquared);
X = (EditText)findViewById(R.id.xcoeff);
K = (EditText)findViewById(R.id.kconst);
}
public Button Button1 = null;
public Button Button2 = null;
public void QA (View view){
//double sol1=0.0, sol2=0.0, disc=0.0;
int a = Integer.parseInt(X2.getText().toString());
//int b = Integer.getInteger(X.getText().toString());
//int c = Integer.getInteger(K.getText().toString());
//disc = Math.pow(b, 2) - 4.0*a*c;
//sol1 = (-b + Math.sqrt(disc)) / (2.0 * a);
//sol2 = (-b - Math.sqrt(disc)) / (2.0 * a);
answer.setText(a);
};
public void BACK (View view){
Intent i = new Intent(this, ExtraCreditActivity.class);
startActivity(i);
}
}
Here is the xml file
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TableLayout
android:id="#+id/tableLayout1"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1" >
<TableRow
android:id="#+id/tableRow2"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight=".6" >
</TableRow>
<TableRow
android:id="#+id/tableRow1"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1" >
<EditText
android:id="#+id/xsquared"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_weight="1"
android:inputType="number" />
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="0dp"
android:layout_weight="1"
android:gravity="center"
android:text="X^2 +"
android:textSize="20dp" />
<EditText
android:id="#+id/xcoeff"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:inputType="number" />
<TextView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_weight="1"
android:gravity="center"
android:text="X + "
android:textSize="20dp" />
<EditText
android:id="#+id/kconst"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginRight="10dp"
android:layout_weight="1"
android:inputType="number" >
<requestFocus />
</EditText>
</TableRow>
<TableRow
android:id="#+id/tableRow3"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight="1.2" >
<Button
android:id="#+id/quad"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:onClick="QA"
android:text="Quadratic" />
</TableRow>
<TableRow
android:id="#+id/tableRow4"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_weight=".8" >
<TextView
android:id="#+id/B1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="2pt"
android:text="#string/app_name" />
</TableRow>
<TableRow
android:id="#+id/tableRow5"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<Button
android:id="#+id/backwards"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Back"
android:onClick="BACK" />
</TableRow>
</TableLayout>
</LinearLayout>

Most likely you're problem is in trying to parse an empty string. Perhaps you can simply avoid performing any calculations unless all fields can be correctly parsed. Put your parsing into a try/catch block.

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

java.lang.NumberFormatException is there a better way around this issure? - android

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Problems from Editable (EditText) to Integers

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