how to clear entries from several EditTexts?

how to clear entries from several EditTexts? - android

I am new to java and android so please forgive me if i am asking to simple question.
I have an application which requires user input in two EditTexts. Those inputs are multipied and result is displayed in TextView. I would like to use "clear entries" button which would clear the content of user entries and displayed result. Is there any way to do it?
Here is an application code.
package c.example.rectangle;
import android.os.Bundle;
import android.view.View;
import android.app.Activity;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity implements OnClickListener{
EditText l;
EditText w;
TextView a;
Button b;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
l = (EditText) findViewById(R.id.length);
w = (EditText) findViewById(R.id.width);
a = (TextView) findViewById(R.id.lblarea);
b = (Button) findViewById(R.id.calculate);
b.setOnClickListener(this);
}
public void onClick(View v) {
calculateRectangle(l.getText().toString(), w.getText().toString());
}
private void calculateRectangle(String clength, String cwidth){
double area = Double.parseDouble(clength)*Double.parseDouble(cwidth);
a.setText(String.valueOf(area));
}}
And here is my XML Code.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#8B4513"
android:orientation="vertical" >
<TextView
android:id="#+id/label1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:layout_marginTop="20dp"
android:background="#2F4F4F"
android:gravity="center"
android:text="#string/rect"
android:textAppearance="?android:attr/textAppearanceMedium" />
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#8B4513"
android:orientation="horizontal" >
<TextView
android:id="#+id/label2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="30dp"
android:layout_marginTop="50dp"
android:background="#2F4F4F"
android:gravity="center"
android:text="#string/cm"
android:textAppearance="?android:attr/textAppearanceMedium" />
<EditText
android:id="#+id/length"
android:layout_width="110dp"
android:layout_height="21dp"
android:layout_marginLeft="40dp"
android:layout_marginTop="50dp"
android:background="#2F4F4F"
android:ems="10"
android:gravity="center"
android:hint="#string/help"
android:inputType="text" />
</LinearLayout>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#8B4513"
android:orientation="horizontal" >
<TextView
android:id="#+id/label3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#2F4F4F"
android:layout_marginLeft="30dp"
android:layout_marginTop="20dp"
android:text="#string/breadth"
android:textAppearance="?android:attr/textAppearanceMedium" />
<EditText
android:id="#+id/width"
android:layout_width="110dp"
android:layout_height="21dp"
android:layout_marginLeft="33dp"
android:layout_marginTop="20dp"
android:background="#2F4F4F"
android:inputType="text"
android:hint="#string/help"
android:ems="10"
android:gravity="center"
>
<requestFocus />
</EditText>
</LinearLayout>
<Button
android:id="#+id/calculate"
android:layout_width="fill_parent"
android:layout_marginLeft="100dip"
android:layout_marginRight="100dip"
android:layout_height="wrap_content"
android:text="#string/calculate"
android:layout_marginTop="20dp" />
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#8B4513"
android:orientation="horizontal" >
<TextView
android:id="#+id/label4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="30dp"
android:layout_marginTop="20dp"
android:background="#2F4F4F"
android:text="#string/area"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="#+id/lblarea"
android:layout_width="110dp"
android:layout_height="21dp"
android:layout_marginLeft="60dp"
android:layout_marginTop="20dp"
android:background="#2F4F4F"
android:gravity="center"/>
</LinearLayout>
<Button
android:id="#+id/clear"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="100dip"
android:layout_marginRight="100dip"
android:layout_marginTop="20dp"
android:text="#string/clear" />
</LinearLayout>
I would be very appreciate for the answer.

Why not just set both editTexts to empty when you no longer need the data in them to be displayed?
EditText.setText("");
Same thing with the TextView;
TextView.setText("");

If you are wanting to iterate through them, you can put them in a list then use a for loop to set the text to ""
List<EditText> myList = new List<EditText>();
myList.add(editText1);
Then in your clear method
for (int x = 0; x < myList.size(); x++
{
myList.get(x).setText("");
}

Why nobody seems to use the really useful android:onClick ?
<Button
...
android:text="#string/calculate"
android:onClick="calculate" />
<Button
...
android:text="#string/clear"
android:onClick="clearForm" />
With the following activity :
class MyActivity extends Activity
{
...
/**
* Calculate
* android:onClick="calculate"
*/
public void calculate(View view)
{
// Handle click on your 'Calculate' button
}
/**
* Clear form
* android:onClick="clearForm"
*/
public void clearForm(View view)
{
int[] ids = new int[]{R.id.length, R.id.width};
for(int id : ids)
{
((EditText) this.findViewById(id).)setText("");
}
}
}
This way, you do not have to care about ids and your code will be more clean than clean.
Ids should not be overused! They are great on views that can be 'changed' by the user to handle those changes (and to enjoy the onSaveInstanceState() natural behavior) but that's it!
IMO.

If you want to create a clear button, do the following.
Create a Button in your xml:
<Button
android:id="#+id/clear_button"
... you own layout prefs ...
/>
Create a listener for the button in your code:
OnClickListener clearButtonListener = new OnClickListener(){
#Override
public void onClick(View view) {
((EditText)findViewById(R.id.id_for_text_box_a)).setText("");
//...do this for all your edit texts that you want to clear
}
};
Connect the listener to the button
Button clearButton = (Button) findViewById(R.id.clear_button);
clearButton.setOnClickListener(clearButtonListener);
Alternatively, instead of finding the edit texts by id in the listener, they could be instance variables that get initialized in onCreate or wherever. I would also recommend not using one letter variable names.
Personally, I would set OnClickListeners instead of the onClick attribute in the XML. Although using the XML onClick attribute may amount to fewer lines of code, it unfortunately creates a very tight coupling of layout and functionality. I prefer to have XML for layout, and Java for functionality. Additionally, being forced to use ids amounts to requiring XML elements to have variable names, which makes for more readable layout code (what is this button? what is this checkbox for?). Another problem I see with using the onClick attribute is that it forces your methods called to be public, which doesn't really make sense for many of these methods. I prefer to understand what an Activity does functionally through reading the Java, and I would rather not have unreferenced public methods floating around in my Activities.

Related

Can't make calculations using a mix of TextView and EditText

I'm currently making a very simple math game. In this math game I want the player to solve easy equations. It looks like this: 9 * __ = 45, the player then fill in the correct number to solve the equation and then presses a Correct-button. If correct scores are added to the player.
The empty space is an EditText and the others are TextViews. Because I use a mix of TextView & EditText I need somehow to make a convertion for the program to be able to read and calculate. I've been reading like crazy and tried all kinds of different methods without success. How should I do to get around this?
This is how my data looks like:
activity_play.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/activity_play"
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"
tools:context="com.example.android.laboration2.PlayActivity">
<TextView
android:id="#+id/textPlayMultiply"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="#+id/textPlayNumber1"
android:layout_centerHorizontal="true"
android:text="#string/multiply"
android:textAlignment="textStart"
android:layout_gravity = "start"
android:textColor="#android:color/black"
android:textSize="40sp" />
<TextView
android:id="#+id/textPlayNumber1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignEnd="#+id/textPlayScore"
android:layout_alignParentTop="true"
android:layout_alignRight="#+id/textPlayScore"
android:layout_marginTop="48dp"
android:text="#string/number_1"
android:textAlignment="center"
android:textColor="#android:color/black"
android:textSize="50sp" />
<TextView
android:id="#+id/textPlayEqual"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:text="#string/equal"
android:textAlignment="center"
android:textColor="#android:color/black"
android:textSize="50sp"
android:layout_below="#+id/editTextPlayNumber2"
android:layout_alignLeft="#+id/textPlayMultiply"
android:layout_alignStart="#+id/textPlayMultiply" />
<TextView
android:id="#+id/textPlayResult"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="29dp"
android:text="#string/result_number3"
android:textAlignment="center"
android:textColor="#android:color/black"
android:textSize="50sp"
android:layout_below="#+id/textPlayEqual"
android:layout_alignLeft="#+id/textPlayEqual"
android:layout_alignStart="#+id/textPlayEqual" />
<TextView
android:id="#+id/textPlayScore"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginBottom="31dp"
android:layout_toStartOf="#+id/answerButton"
android:text="#string/score_0"
android:textAlignment="textStart"
android:layout_gravity="start"
android:textColor="#android:color/black"
android:textSize="24sp"
android:layout_toLeftOf="#+id/answerButton" />
<Button
android:id="#+id/answerButton"
android:layout_width="120dp"
android:layout_height="wrap_content"
android:layout_marginTop="36dp"
android:background="#android:color/holo_orange_dark"
android:text="#string/button_result"
android:textAllCaps="false"
android:textColor="#android:color/white"
android:textSize="18sp"
android:textStyle="bold"
android:layout_below="#+id/textPlayResult"
android:layout_centerHorizontal="true" />
<EditText
android:id="#+id/editTextPlayNumber2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/textPlayMultiply"
android:layout_alignBottom="#+id/textPlayMultiply"
android:layout_marginLeft="16dp"
android:layout_marginStart="16dp"
android:layout_toEndOf="#+id/answerButton"
android:layout_toRightOf="#+id/answerButton"
android:hint=" "
android:inputType="number"
android:textAlignment="center"
android:textColor="#android:color/black"
android:textSize="50sp" />
<TextView
android:id="#+id/textPlayLevel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/textPlayScore"
android:layout_alignBottom="#+id/textPlayScore"
android:layout_toEndOf="#+id/answerButton"
android:layout_toRightOf="#+id/answerButton"
android:text="#string/level_0"
android:textAlignment="center"
android:textColor="#android:color/black"
android:textSize="24sp" />
</RelativeLayout>
.
PlayActivity.java
package com.example.android.laboration2;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class PlayActivity extends AppCompatActivity implements View.OnClickListener {
TextView textPlayNumber1;
EditText editTextPlayNumber2;
TextView textPlayResult;
TextView textPlayScore;
TextView textPlayLevel;
Button answerButton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_play);
textPlayNumber1 = (TextView) findViewById(R.id.textPlayNumber1);
editTextPlayNumber2 = (EditText) findViewById(R.id.editTextPlayNumber2);
textPlayResult = (TextView) findViewById(R.id.textPlayResult);
textPlayScore = (TextView) findViewById(R.id.textPlayScore);
textPlayLevel = (TextView) findViewById(R.id.textPlayLevel);
answerButton = (Button) findViewById(R.id.answerButton);
answerButton.setOnClickListener(this);
}//onCreate ends here
#Override
public void onClick(View v) {
}//onClick ends here
}//PlayActivity ends here

You can do
int playNumberValue = Integer.getInteger(textPlayNumber1.getText().toString());
int userInputValue = Integer.getInteger(editTextPlayNumber2.getText().toString());
int result = Integer.getInteger(textPlayResult.getText().toString());
if(result == userInputValue+playNumberValue)
//win game

Your TextView and EditText all have String type values. You have to parse those value to Integer then calculate and show the result.
Here is the action onClick answer button-
int score = 0;
#Override
public void onClick(View v) {
switch(v.getId()){
case R.id.answerButton:
int playNum1 = Integer.parseInt(textPlayNumber1.getText().toString());
int playNum2 = Integer.parseInt(editTextPlayNumber2.getText().toString());
int playResult = Integer.parseInt(textPlayResult.getText().toString());
if(playNum1*playNum2 == playResult){
score++;
textPlayScore.setText(""+score);
}
break;
}
}
Hope this helps.

Soft Keyboard doesn't appear when tapping on EditText

I got a really weird problem. I am working on an Android app. If I use my layout on an Activity everything works as expected. But, if I use my layout in a Fragment the Soft Keyboard doesn't show anymore when I focus an EditText.
Here is the code of my fragment:
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import mariohenkel.com.familycheck.R;
import mariohenkel.com.familycheck.fragment.api.BaseFragment;
/**
* Created by Developer on 15.06.2015.
*/
public class SuchenFragment extends BaseFragment {
public static SuchenFragment newInstance() {
return new SuchenFragment();
}
private View v;
EditText etOrt;
public SuchenFragment(){ }
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.i("SuchenFragment", "onCreate");
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
v = inflater.inflate(R.layout.fragment_suchen_neu, container, false);
loadViewComponents();
loadInfoView();
return v;
}
private void loadViewComponents() {
etOrt = (EditText) v.findViewById(R.id.editText_Ort);
etOrt.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.i("onClick", "onClick");
}
});
}
private void loadInfoView() {
}
}
The onClick() Event of the EditText fires correctly. I tried to force show the keyboard within the onClick() with following code
InputMethodManager mImm = (InputMethodManager)
getSystemService(Context.INPUT_METHOD_SERVICE);
mImm.showSoftInput(SearchEdit, InputMethodManager.SHOW_IMPLICIT);
but without success. Any ideas what I am doing wrong?
EDIT: I am using this project https://github.com/halysongoncalves/Material-Design-Example and I am trying to use the second tab. The first one is working as expected.
EDIT2: This is my layout:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/white">
<TableLayout
android:id="#+id/tl_views"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:stretchColumns="1">
<TableRow
android:background="#color/accent"
android:minHeight="60dp">
<TextView
android:id="#+id/titel_ort"
android:layout_marginLeft="16dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#android:color/white"
android:textAppearance="?android:textAppearanceLarge"
android:layout_gravity="center_vertical"
android:text="Ort: "/>
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:hint="Ort eingeben"
android:id="#+id/editText_Ort"
android:paddingRight="16dp">
<requestFocus />
</EditText>
</TableRow>
<TableRow
android:background="#color/gruen"
android:minHeight="60dp">
<TextView
android:id="#+id/titel_kategorie"
android:layout_marginLeft="16dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#android:color/white"
android:textAppearance="?android:textAppearanceLarge"
android:layout_gravity="center_vertical"
android:text="Kategorie: "/>
<Spinner
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/spinner_Kategorie"
android:layout_gravity="center_vertical"
android:paddingRight="16dp"
android:spinnerMode="dropdown" />
</TableRow>
<TableRow
android:background="#color/gelb"
android:minHeight="60dp">
<TextView
android:id="#+id/titel_suchbegriff"
android:layout_marginLeft="16dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#android:color/white"
android:textAppearance="?android:textAppearanceLarge"
android:layout_gravity="center_vertical"
android:text="Suchbegriff: "/>
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/editText_Suchbegriff"
android:layout_gravity="center_vertical"
android:hint="Suchbegriff"
android:paddingRight="16dp"/>
</TableRow>
</TableLayout>
<RelativeLayout
android:layout_below="#+id/tl_views"
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="#color/theme_dialer_primary"
android:gravity="center">
<TextView
android:id="#+id/titel_suchen"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#android:color/white"
android:textAppearance="?android:textAppearanceLarge"
android:text="Jetzt suchen"/>
</RelativeLayout>
</RelativeLayout>
Update: One more weird thing. If I open another activity and go back to the activity which hosts the fragments the keyboard is working as expected...

In your xml use, in your EditText tags
<requestFocus />
source : EditText request focus
Also checkout : Android: show soft keyboard automatically when focus is on an EditText
P.S. Little exploration on SO or Google would have the problem, and will save your time of writing the question.

After recreating my project step by step I found my mistake.
In my first fragment I used an AsyncTask with .get() to aquire a SID from a server. After I removed that .get() and changed my following logic everything worked as expected.

Characters appear in the order as i click

For example. There is picture on the top of the screen below that there are some empty boxes and below the boxes there are some buttons. Every button has a character for text("a","c","t"). You click on a button and the button's text appear in the box. You can click them in the order you want to but the answer is "cat" so when you put the characters in the correct order then you got a toast.
I tried to do it with TextViews and Buttons. I can make the button disappear when i click on it and a textview appear in the same time. But every textview has a fix place on the screen, so i need to put every character in every box invisible and when i click on the "c" character it appear in the first box and the other "c" characters stay invisible. But if i click on the "a" first, then it appears in the second box because there is too much variation to do all. I'm not good at explaining but if anyone has an idea how to do that easier please response!
Here is my code:
public class MainActivity extends ActionBarActivity implements OnClickListener{
Button b1;
Button b2;
Button b3;
TextView tg1;
TextView tg2;
TextView tg3;
TextView to1;
TextView to2;
TextView to3;
TextView tl1;
TextView tl2;
TextView tl3;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b1 = (Button)findViewById(R.id.bg);
b1.setOnClickListener(this);
b2 = (Button)findViewById(R.id.bo);
b2.setOnClickListener(this);
b3 = (Button)findViewById(R.id.bl);
b3.setOnClickListener(this);
tg1 = (TextView)findViewById(R.id.tg1);
tg2 = (TextView)findViewById(R.id.tg2);
tg3 = (TextView)findViewById(R.id.tg3);
to1 = (TextView)findViewById(R.id.to1);
to2 = (TextView)findViewById(R.id.to2);
to3 = (TextView)findViewById(R.id.to3);
tl1 = (TextView)findViewById(R.id.tl1);
tl2 = (TextView)findViewById(R.id.tl2);
tl3 = (TextView)findViewById(R.id.tl3);
}
#Override
public void onClick(View v) {
switch(v.getId()) {
case R.id.bg:
b1.setVisibility(View.INVISIBLE);
tg1.setVisibility(View.VISIBLE);
tg2.setVisibility(View.INVISIBLE);
tg3.setVisibility(View.INVISIBLE);
break;
case R.id.bo:
b2.setVisibility(View.INVISIBLE);
to2.setVisibility(View.VISIBLE);
to1.setVisibility(View.INVISIBLE);
to3.setVisibility(View.INVISIBLE);
break;
case R.id.bl:
b3.setVisibility(View.INVISIBLE);
tl3.setVisibility(View.VISIBLE);
tl2.setVisibility(View.INVISIBLE);
tl1.setVisibility(View.INVISIBLE);
}
}
}
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
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"
tools:context="hu.szada.gombokelso.MainActivity"
android:orientation="horizontal">
<TextView
android:id="#+id/tl1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:visibility="invisible"
android:text="l"/>
<Button
android:id="#+id/bo"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="86dp"
android:onClick="onClick"
android:text="o" />
<Button
android:id="#+id/bl"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_alignBaseline="#+id/bg"
android:layout_alignBottom="#+id/bg"
android:layout_alignParentLeft="true"
android:layout_marginLeft="36dp"
android:onClick="onClick"
android:text="l" />
<Button
android:id="#+id/bg"
android:layout_width="40dp"
android:layout_height="40dp"
android:layout_centerVertical="true"
android:layout_marginRight="14dp"
android:layout_toLeftOf="#+id/bo"
android:onClick="onClick"
android:text="g" />
<TextView
android:id="#+id/tg1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/tl"
android:layout_alignBottom="#+id/tl"
android:layout_alignLeft="#+id/tl"
android:layout_weight="1"
android:visibility="invisible"
android:text="g" />
<TextView
android:id="#+id/to1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/tl"
android:layout_alignBottom="#+id/tl"
android:layout_alignLeft="#+id/tl"
android:layout_weight="1"
android:visibility="invisible"
android:text="o" />
/// Second
<TextView
android:id="#+id/to2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/tl1"
android:layout_alignBottom="#+id/tl1"
android:layout_marginLeft="19dp"
android:layout_toRightOf="#+id/tl1"
android:layout_weight="1"
android:visibility="invisible"
android:text="o" />
<TextView
android:id="#+id/tg2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/to2"
android:layout_alignBottom="#+id/to2"
android:layout_alignLeft="#+id/to2"
android:layout_weight="1"
android:visibility="invisible"
android:text="g" />
<TextView
android:id="#+id/tl2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/to2"
android:layout_alignBottom="#+id/to2"
android:layout_alignRight="#+id/to2"
android:layout_weight="1"
android:visibility="invisible"
android:text="l" />
/// Third
<TextView
android:id="#+id/tg3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/to2"
android:layout_alignBottom="#+id/to2"
android:layout_alignRight="#+id/bl"
android:layout_weight="1"
android:visibility="invisible"
android:text="g" />
<TextView
android:id="#+id/tl3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/tg3"
android:layout_alignBottom="#+id/tg3"
android:layout_alignLeft="#+id/tg3"
android:layout_weight="1"
android:visibility="invisible"
android:text="l" />
<TextView
android:id="#+id/to3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/tg3"
android:layout_alignBottom="#+id/tg3"
android:layout_toRightOf="#+id/tl3"
android:layout_weight="1"
android:visibility="invisible"
android:text="o" />

You might want to try a slightly different approach.
If I understand you correctly, you want to "type" a word out using given lettered buttons. Like one of those hangman style games.
Why not append the text views on the fly.
Something like
#Override
public void onClick(View v) {
//Grab the surrounding layout for the textviews
GridView answerGrid = (GridView)getViewById(R.id.answerGrid);
//Get the text that was on the button
Button b = (Button)v;
String btnText = b.getText().toString();
//Make a text view with text
TextView txt = new TextView();
text.setText(btnText);
//Append to text view container
answerGrid.addView(txt);
//Invisible button
b.setVisibility(View.INVISIBLE);
}
Haven't tested to see if this is perfect, but its a start.
=====
I've looked at your xml
Why not use GridViews?
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
....>
<GridView android:id="#+id/answerGrid"
....>
<!-- Put nothing here. This is for answers -->
</GridView>
<GridView android:id="#+id/lettersGrid"
android:layout_below="answerGrid"
....>
<!-- Buttons in here -->
</GridView>
</RelativeLayout>
This way you can customise the number of rows/columns based on the length of the word you're playing with. And GridView will automatically give you a neat layout and spacing.
Have a look at the GridView doc and get it customised the way you want it.
See my edits above for the Java code.

Alignment Layout exchange between classes - Android Studio

I am implementing a program that uses database and interacts with different layouts of entries and editing users.
I'm working with RelativeLayout on all screens. In one of thelayouts, I insert a perfectly aligned button and give the command android:visibility="gone" for him to show upon request.
The problem is that when I need to use it at command editarBt.setVisibility(View.VISIBLE), the button appears out of alignment and overlaps the fields for entering information.
Is there any way to keep the position of command by button?
I will not put the entire code because it has 7 classes, so I'll just put the classes that interest.
EnterPatientActivity Class
package br.luizhmu.aulas_android_sqlite;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
/**
* Created by LuizHMU on 2/17/15.
*/
public class EnterPatientActivity extends Activity {
private Paciente paciente = new Paciente();
private EditText nomeEt;
private EditText emailEt;
private EditText senhaEt;
private Button salvarBt;
private Button editarBt;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_inserir_paciente);
nomeEt = (EditText) findViewById(R.id.editTextNome);
emailEt = (EditText) findViewById(R.id.editTextEmail);
senhaEt = (EditText) findViewById(R.id.editTextSenha);
salvarBt = (Button) findViewById(R.id.buttonSalvar);
editarBt = (Button) findViewById(R.id.buttonEditar);
Intent intent = getIntent();
if(intent != null){
Bundle bundle = intent.getExtras();
if(bundle != null){
paciente.setId(bundle.getLong("id"));
paciente.setNome(bundle.getString("nome"));
paciente.setEmail(bundle.getString("email"));
nomeEt.setText(paciente.getNome());
emailEt.setText(paciente.getEmail());
senhaEt.setVisibility(View.GONE);
salvarBt.setVisibility(View.GONE);
editarBt.setVisibility(View.VISIBLE);
}
}
}
public void salvar(View view){
paciente.setNome(nomeEt.getText().toString());
paciente.setEmail(emailEt.getText().toString());
paciente.setSenha(senhaEt.getText().toString());
DataBase bd = new DataBase(this);
bd.inserir(paciente);
Toast.makeText(this, "Paciente inserido com sucesso!", Toast.LENGTH_SHORT).show();
}
public void editar(View view){
paciente.setNome(nomeEt.getText().toString());
paciente.setEmail(emailEt.getText().toString());
DataBase bd = new DataBase(this);
bd.atualizar(paciente);
Toast.makeText(this, "Paciente \""+paciente.getNome()+"\" atualizado com sucesso.", Toast.LENGTH_SHORT).show();
}
}
activity_inserir_paciente.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="15dp"
android:paddingRight="15dp"
android:background="#ffffea0a"
tools:context=".EnterPatientActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Novo paciente"
android:id="#+id/textView3"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:textColor="#ff1727ff"
android:textSize="20dp"/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:hint="*Nome"
android:ems="10"
android:id="#+id/editTextNome"
android:layout_below="#+id/textView3"
android:layout_alignRight="#+id/buttonSalvar"
android:layout_alignEnd="#+id/buttonSalvar" />
<EditText
android:hint="Telefone"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="phone"
android:ems="10"
android:id="#+id/editTextTelefone"
android:layout_below="#+id/editTextNome"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true" />
<EditText
android:hint="*E-mail"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textEmailAddress"
android:ems="10"
android:id="#+id/editTextEmail"
android:layout_below="#+id/editTextTelefone"
android:layout_alignLeft="#+id/editTextTelefone"
android:layout_alignStart="#+id/editTextTelefone" />
<EditText
android:hint="*Senha"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPassword"
android:ems="10"
android:id="#+id/editTextSenha"
android:layout_below="#+id/editTextEmail"
android:layout_alignLeft="#+id/editTextEmail"
android:layout_alignStart="#+id/editTextEmail" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Salvar"
android:id="#+id/buttonSalvar"
android:onClick="salvar"
android:layout_below="#+id/textView4"
android:layout_alignRight="#+id/editTextSenha"
android:layout_alignEnd="#+id/editTextSenha" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Editar"
android:id="#+id/buttonEditar"
android:layout_alignTop="#+id/buttonSalvar"
android:layout_toLeftOf="#+id/buttonSalvar"
android:layout_toStartOf="#+id/buttonSalvar"
android:visibility="gone"
android:onClick="editar"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="* Campos de preenchimento obrigatório"
android:textColor="#000000"
android:id="#+id/textView4"
android:layout_below="#+id/editTextSenha"
android:layout_alignLeft="#+id/editTextSenha"
android:layout_alignStart="#+id/editTextSenha" />
</RelativeLayout>

In a RelativeLayout, you can prevent views from overlapping by using the layout_toLeftOf, layout_toRightOf, layout_above and layout_below attributes, which expect a view id as value.
Also, you might want to use View.INVISIBLE instead of View.GONE: The former will consider the view during layouting, but hide it. The latter will pretend the view does not exist, therefore altering your layout result.

Use buttons in game-style scenario

I have a 5 linear layouts, each containing 10 buttons, which gives rise to a 5 by 10 array of buttons. I would like the user to select 5 buttons, and each button contains a certain point value. On the next page, I would like the sum of the point values of these 5 buttons to appear in a textview.
Here is what I have tried so far, using a small sample of my code.
On the xml file: (this is a 2 by 3 sample)
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="#+id/button11"
android:layout_width="0dip"
android:layout_weight="1"
android:layout_height="wrap_content"
android:text="50" />
<Button
android:id="#+id/button12"
android:layout_width="0dip"
android:layout_weight="1"
android:layout_height="wrap_content"
android:text="50" />
<Button
android:id="#+id/button13"
android:layout_width="0dip"
android:layout_weight="1"
android:layout_height="wrap_content"
android:text="75" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="#+id/button21"
android:layout_width="0dip"
android:layout_weight="1"
android:layout_height="wrap_content"
android:text="00" />
<Button
android:id="#+id/button22"
android:layout_width="0dip"
android:layout_weight="1"
android:layout_height="wrap_content"
android:text="25" />
<Button
android:id="#+id/button23"
android:layout_width="0dip"
android:layout_weight="1"
android:layout_height="wrap_content"
android:text="75" />
</LinearLayout>
I am not sure what to do on the java file, but I was considering giving each button id a value (which is currently represented by the name of the button) and adding up all the values, which will then be displayed on the next page.

You can just convert the text on the button to an integer:
int value = 0;
try {
value = Integer.parseInt(button.getText().toString());
}
catch(NumberFormatException nfe) {
}

Say that xml file is called activity_main.xml. You need to have an Activity class, let's call it MainActivity.java
MainActivity.java
public class MainActivity extends Activity implements OnClickListener{
private totalVal = 0;
#Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button12 = (Button) findViewById(R.id.button12);
button12.setOnClickListener(this);
// ... Do the same for the rest of the buttons
}
#Override
public void onClick(View v){
switch(v.getId(){
case R.id.button12:
int textVal = Integer.parseInt(v.getText().toString());
totalVal = totalVal + textVal;
// do whatever else you want to when the button is clicked
break;
// ... Do the same for the rest of the buttons
}
You would also need a button that says you are done, and implement it in a similar way

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.

how to clear entries from several EditTexts? - android

Why not just set both editTexts to empty when you no longer need the data in them to be displayed? EditText.setText(""); Same thing with the TextView; TextView.setText("");

If you are wanting to iterate through them, you can put them in a list then use a for loop to set the text to "" List<EditText> myList = new List<EditText>(); myList.add(editText1); Then in your clear method for (int x = 0; x < myList.size(); x++ { myList.get(x).setText(""); }

Related

Can't make calculations using a mix of TextView and EditText

Soft Keyboard doesn't appear when tapping on EditText

Characters appear in the order as i click

Alignment Layout exchange between classes - Android Studio

Use buttons in game-style scenario

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