Develop Reference

OnClick Button action in Custom ListView

Actually, I was trying to implement a shopping cart using Android Studio. There is a custom list view in the main page included an "Add to Cart" button. So, whenever I click on the button the item must be added in the cart. But, I have no idea. Please guys, help me out. I'm a newbie.
Here is the Product Adapter
package com.example.raswap.octomatic;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
/**
* Created by aurora on 22/03/16.
*/
public class Pro_Adapter extends ArrayAdapter {
List list = new ArrayList();
public Pro_Adapter(Context context, int resource) {
super(context, resource);
}
static class DataHandler{
ImageView img;
TextView p_name;
TextView b_name;
TextView price;
Button b_atc;
}
#Override
public void add(Object object) {
list.add(object);
}
#Override
public int getCount() {
return this.list.size();
}
#Override
public Object getItem(int position) {
return this.list.get(position);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View row;
row = convertView;
DataHandler handler;
if(convertView == null){
LayoutInflater inflater = (LayoutInflater)this.getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
row = inflater.inflate(R.layout.e_layout, parent, false);
handler = new DataHandler();
handler.img = (ImageView)row.findViewById(R.id.pro_image);
handler.p_name = (TextView)row.findViewById(R.id.pro_name);
handler.b_name = (TextView)row.findViewById(R.id.brand);
handler.price = (TextView)row.findViewById(R.id.pricing);
handler.b_atc = (Button)row.findViewById(R.id.atc);
row.setTag(handler);
}else{
handler = (DataHandler)row.getTag();
}
Product_data_provider dataProvider;
dataProvider = (Product_data_provider)this.getItem(position);
handler.img.setImageResource(dataProvider.getPro_img_resource());
handler.p_name.setText(dataProvider.getPro_name());
handler.b_name.setText(dataProvider.getBr_name());
handler.price.setText(dataProvider.getPricing());
return row;
}
}
Here is the Main Activity class:
package com.example.raswap.octomatic;
import android.app.Activity;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;
public class E_shop extends Activity {
ListView listView;
int[] emage = {R.drawable.gb32, R.drawable.tb1, R.drawable.dvd};
String[] pro_name;
String[] br_name;
String[] price;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.activity_e_shop);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_titlebar);
View z = findViewById(R.id.oct_logo);
z.setClickable(true);
z.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(E_shop.this, MainActivity.class));
}
});
View x = findViewById(R.id.for_user_info);
x.setClickable(true);
x.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
startActivity(new Intent(E_shop.this, UserInformation.class));
}
});
Pro_Adapter adapter = new Pro_Adapter(getApplicationContext(),R.layout.e_layout);
ListView listView = (ListView)findViewById(R.id.e_list);
listView.setAdapter(adapter);
pro_name = getResources().getStringArray(R.array.nameOfProduct);
br_name = getResources().getStringArray(R.array.branding);
price = getResources().getStringArray(R.array.pricing);
int i = 0;
for(String pro: pro_name){
Product_data_provider dataProvider = new Product_data_provider(emage[i],pro, br_name[i], price[i]);
adapter.add(dataProvider);
i++;
}
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch(position){
case 0:
Intent newActivity = new Intent(E_shop.this, Product_Desc.class);
newActivity.putExtra("pro_emage",R.drawable.gb32);
newActivity.putExtra("title","Kingston 32Gigs Pen Drive");
newActivity.putExtra("desc", "Store a huge collection of data in a generous 32GB space of this Kingston pen drive and carry it along. It has a sleek design with a smooth finish, and a pretty-looking charm bearing the Kingston logo dangles from this pen drive. Featured in a size of 3 x 1.2 x 0.5 cm, this Kingston 32GB pen drive weighs only 5g. You can easily tuck it away in the pocket of your laptop bag, purse or your shirt pocket with its compact and light weight.");
startActivity(newActivity);
break;
case 1:
Intent Activity1 = new Intent(E_shop.this, Product_Desc.class);
Activity1.putExtra("pro_emage",R.drawable.tb1);
Activity1.putExtra("title","Samsung 1TB Portable Hard Disk");
Activity1.putExtra("desc", "From college to school students, all deal with transferring files, software and applications from various systems that are large in size. With the advancements in media technology on the rise, we require a large amount of space to store our data. Even most of the growing companies require a secure means of storing data for analyses. All of this embarks on the need for a reliable hard disk. The top quality brand of Samsung brings you this sleek and portable hard drive ideally designed for continuous usage. Now you can store 2TB of diverse data easily. This, sleek hard disk comes with 36 months warranty. The body of this drive has a smart construction. The Samsung external hard disk comes in a sturdy design.");
startActivity(Activity1);
break;
case 2:
Intent Activity2 = new Intent(E_shop.this, Product_Desc.class);
Activity2.putExtra("pro_emage", R.drawable.dvd);
Activity2.putExtra("title", "A pack of 50 DVD's");
Activity2.putExtra("desc", "Create and store digital video, audio and multimedia files, Stores up to 4.7GB or more than 2 hours of MPEG2 video, Has 7 times the storage capacity of a CDR, Sony branded 16X DVD-R in a 100 pack Spindle, AccuCORE Technology");
startActivity(Activity2);
break;
}
}
#SuppressWarnings("unused")
public void onClick(View v){
}
});
}
}
Here is the Product Data Provider Class:
package com.example.raswap.octomatic;
/**
* Created by aurora on 22/03/16.
*/
public class Product_data_provider {
private int pro_img_resource;
private String pro_name;
private String br_name;
private String pricing;
public int getPro_img_resource() {
return pro_img_resource;
}
public Product_data_provider(int pro_img_resource, String pro_name, String br_name, String pricing){
this.setPro_img_resource(pro_img_resource);
this.setPro_name(pro_name);
this.setBr_name(br_name);
this.setPricing(pricing);
}
public void setPro_img_resource(int pro_img_resource) {
this.pro_img_resource = pro_img_resource;
}
public String getPro_name() {
return pro_name;
}
public void setPro_name(String pro_name) {
this.pro_name = pro_name;
}
public String getBr_name() {
return br_name;
}
public void setBr_name(String br_name) {
this.br_name = br_name;
}
public String getPricing() {
return pricing;
}
public void setPricing(String pricing) {
this.pricing = pricing;
}
}
Now, Custom ListView XML file:
<?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:descendantFocusability="blocksDescendants">
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<LinearLayout
android:id="#+id/oneL"
android:layout_width="match_parent"
android:layout_height="200dp"
android:orientation="horizontal">
<ImageView
android:id="#+id/pro_image"
android:src="#drawable/gb32"
android:layout_width="160dp"
android:layout_height="match_parent" />
<LinearLayout
android:background="#afeeee"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Product Name"
android:id="#+id/pro_name"
android:textColor="#000"
android:layout_marginTop="10dp"
android:layout_marginLeft="10dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Branding"
android:id="#+id/brand"
android:textColor="#000"
android:layout_marginTop="10dp"
android:layout_marginLeft="10dp"
android:layout_marginBottom="10dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Price"
android:textColor="#000"
android:id="#+id/pricing"
android:layout_marginLeft="10dp"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add to Cart"
android:id="#+id/atc" />
</LinearLayout>
</LinearLayout>
<View
android:layout_below="#+id/oneL"
android:layout_width="match_parent"
android:layout_height="5dp"
android:background="#000"/>
</RelativeLayout>
</RelativeLayout>
and finally the main layout XML file:
<?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: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.raswap.octomatic.E_shop">
<ListView
android:id="#+id/e_list"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</RelativeLayout>

Add your button's OnClick event in the Pro_Adapter's getView() methond as you do normally in your activities' onCreate() method.

Implement OnClickListener in your adapter class and get the Button click first and do the other task when you get the event. If you need the call back to your main activity class implement your own listener.follow the link enter link description here

Add the onClickListener to your Button in getView() of your ListAdapter.

If you want handle event click button in row, i'm think you should answer set button onclick event for every row of listview

you can try this.
Change in custom Listview xml file.
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add to Cart"
android:onClick="AddCart"
android:id="#+id/atc" />
In MainActivity
public void AddCart(View v)
{
LinearLayout vwParentRow = (LinearLayout)v.getParent();
TextView child = (TextView)vwParentRow.getChildAt(0);
child.setText("I've been clicked!");
vwParentRow.refreshDrawableState();
}

tab as like fileexploler

How can i put tab as like this at above..
i want this type of tab when i click item it show on above,can anyone give snippet or links..
and please tell brief if available how can i do this..
as show in figure the red rectangle is there any android tools for that or library....
or directly i can do by code??
Thanks in advance
Rectangle describe what i want
belove is image
..

I have made a simple project for you. You should make it more beautiful as I wasn't focusing on that, just on the code.
First add these values to your color.xml
<resources>
<color name="buttonGrey">#7A7A7A</color>
<color name="layoutHolderStartColor">#F7F7F7</color>
<color name="layoutHolderEndColor">#E1E1E1</color>
</resources>
Next create some background for the button holder and name it gradient_button_holder.xml
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<gradient
android:startColor="#color/layoutHolderStartColor"
android:endColor="#color/layoutHolderEndColor"
android:angle="270"
/>
<corners android:radius="3dp" />
</shape>
Now create activity_main.xml
Note: I am using some images, download the whole project at the bottom and get them out
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
>
<RelativeLayout
android:id="#+id/pathHolder"
android:layout_width="match_parent"
android:layout_height="35dp"
android:layout_alignParentTop="true"
android:background="#drawable/gradient_button_holder"
android:gravity="center_vertical">
<Button
android:id="#+id/btnAdd"
android:layout_width="29dp"
android:layout_height="29dp"
android:layout_alignParentRight="true"
android:layout_marginBottom="3dp"
android:layout_marginLeft="3dp"
android:layout_marginRight="3dp"
android:layout_marginTop="3dp"
android:background="#color/buttonGrey"
android:gravity="center"
android:onClick="onBtnAdd"
android:text="+"
android:textSize="15sp"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:contentDescription="#string/app_name"
android:src="#drawable/seperator"
android:visibility="gone"/>
<HorizontalScrollView
android:id="#+id/btnScrollView"
android:layout_width="wrap_content"
android:layout_height="35dp"
android:layout_alignParentLeft="true"
android:layout_toLeftOf="#id/btnAdd">
<LinearLayout
android:id="#+id/btnFolderHolder"
android:layout_width="wrap_content"
android:layout_height="35dp"
android:orientation="horizontal">
</LinearLayout>
</HorizontalScrollView>
</RelativeLayout>
</RelativeLayout>
Next create the Utils class
import android.annotation.SuppressLint;
import android.os.Build;
import android.view.View;
import java.util.concurrent.atomic.AtomicInteger;
public class Utils {
private static final AtomicInteger sNextGeneratedId = new AtomicInteger(1);
/**
* Generate a value suitable for use in setId(int}.
* This value will not collide with ID values generated at build time by aapt for R.id.
*
* #return a generated ID value
*/
private static int generateViewId() {
for (; ; ) {
final int result = sNextGeneratedId.get();
// aapt-generated IDs have the high byte nonzero; clamp to the range under that.
int newValue = result + 1;
if (newValue > 0x00FFFFFF) {
newValue = 1; // Roll over to 1, not 0.
}
if (sNextGeneratedId.compareAndSet(result, newValue)) {
return result;
}
}
}
#SuppressLint("NewApi")
public static int generateId() {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
return generateViewId();
}
else {
return View.generateViewId();
}
}
}
And finally the MainActivity
import android.graphics.Color;
import android.os.Environment;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.TypedValue;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
import android.widget.Button;
import android.widget.HorizontalScrollView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Toast;
import java.io.File;
public class MainActivity extends ActionBarActivity {
private LinearLayout btnHolder;
private HorizontalScrollView scroller; //parent folders
private ViewTreeObserver observer; //needed for the scroll to the end
private Toast toast;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
makeButtons(Environment.getExternalStorageDirectory().getPath(), "Folder1", "Folder2", "Folder3");
}
private void makeButtons(String... values) {
StringBuilder sb = new StringBuilder(values.length * 2);
for (int i = 0; i < values.length - 1; ++i) {
sb.append(values[i]);
sb.append(File.separator);
addButton(values[i], sb.toString(), true);
}
sb.append(values[values.length - 1]);
addButton(values[values.length - 1], sb.toString(), false);
}
private void init() {
setWidgetConnections();
observer = scroller.getViewTreeObserver();
observer.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
public void onGlobalLayout() {
// this will always scroll to the last folder (displayed on the
// right)
scroller.fullScroll(HorizontalScrollView.FOCUS_RIGHT);
}
});
}
private void setWidgetConnections() {
btnHolder = (LinearLayout) findViewById(R.id.btnFolderHolder);
scroller = (HorizontalScrollView) findViewById(R.id.btnScrollView);
}
public void onBtnAdd(View v) {
}
private void addButton(final String text, final String path, boolean withImage) {
// Dynamic call to add buttons
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
Button btn = new Button(this);
btn.setId(Utils.generateId());
btn.setText(text);
btn.setTextColor(Color.BLACK);
btn.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 12);
btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
goToPath(path);
}
});
//btn.setBackgroundResource(R.drawable.gradient_button_holder);
btnHolder.addView(btn, params);
if (withImage) {
ImageView view = new ImageView(this);
view.setBackgroundResource(R.drawable.seperator2);
btnHolder.addView(view, params);
}
}
private void goToPath(String path) {
showToast(path);
}
private void showToast(String text) {
if (toast != null) {
toast.cancel();
}
toast = Toast.makeText(this, text, Toast.LENGTH_SHORT);
toast.show();
}
}
This is the final result and also note that it is horizontally scrollable
You can download the whole project here

It can be possible through your code,
In that Linear Layout you have to dynamically insert another layout having an image view represents the ">" and the text view used to reprsent the directory
the layout would be looks like that sort of
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
>
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toRightOf="#id/arrow_image"
android:text="Storage"/>
<ImageView
android:id="#+id/arrow_image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/arrow"
android:layout_alignParentLeft="true"
android:layout_alignBottom="#id/textView"
android:layout_alignTop="#id/textView"/>
</RelativeLayout>
While adding the View dynamically you just need to maintain the list of views added in account for clickevents, which would enables you to switch into the directories directly. And just remove that view from your view list as you move back to the previous directory, and that's all! you have made it.
and your code snippet will be look like this
final ArrayList<View> myDynamicView = new ArrayList<>();
//it would be your list item click
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
LayoutInflater inflater = LayoutInflater.from(getActivity());
View dynamicView = inflater.inflate(R.layout.field_layout, null);
dynamicView.setId(unique_id); // create a unique id to refer a view
TextView directoryName = (TextView) view.findViewById(R.id.textView);
directoryName.setText(your_directory_name);//Either fetch it through your array or by extracting the view
myDynamicView.add(myDynamicView.size(), dynamicView);
linearLayout.addView(dynamicView);
dynamicView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
for(int i= 0; i < myDynamicView.size(); i++){
//When view is clicked match the view id from the view list
if(myDynamicView.get(i).getId() == v.getId()){
//when view id got matched it means remove those view which are ahead of it
//from the list as well as from the linear layout
for(int j = i; j < myDynamicView.size(); j++){
View view = myDynamicView.get(j);
linearLayout.removeView(view);
myDynamicView.remove(j);
}
//update list
}
}
}
});
//update your list
}
});

This actually is done using Creating Swipe Views and updating the divider of tabs, or you can even customize the implementation by using HorizontalScrollView and adding a child when going in a folder and removing last child when going back.

Button OnClickListener not working

I am new to Android. I am trying to get input from the EditText and displaying it in TextView with the help of button. When I click the button nothing happens. Please help, here is my MainActivity.java code -
package com.example.addname;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
Button b1;
TextView v1;
EditText t1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b1 = (Button) findViewById(R.id.button1);
t1 = (EditText) findViewById(R.id.editText1);
v1 = (TextView) findViewById(R.id.textView1);
b1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
if(t1.getText().toString()=="")
{
v1.setText(t1.getText().toString());
}
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
}
and here is my activity_main.xml
<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"
tools:context=".MainActivity" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:text="#string/hello_world" />
<EditText
android:id="#+id/editText1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:layout_marginTop="25dp"
android:ems="10" >
<requestFocus />
</EditText>
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="#+id/textView1"
android:layout_below="#+id/editText1"
android:layout_marginTop="48dp"
android:text="Button" />
</RelativeLayout>

Instead of
if(t1.getText().toString()=="")
{
v1.setText(t1.getText().toString());
}
You can use
if(t1.getText().isEmpty()) // isEmpty() is only available from API 9 and Above
{
v1.setText(t1.getText().toString());
}
or this
if(t1.getText().trim().length == 0)
{
v1.setText(t1.getText().toString());
}
Don't compare strings using ==. You're actually comparing reference of an object. To compare strings, use equals() method.

I'd recommend comparing strings with .equals() since Objects compared with == usually fails (== compares references, not Object content).
if(t1.getText().toString().equals("")))
in your case though,since you're comparing an empty String, you can also use
if (t1.getText().toString().length == 0)
Then note that once you set the text, you're setting v1's text to an empty string since your logic indicates that only upon an empty string you set v1's text. So I'd recommend getting rid of the if altogether:
#Override
public void onClick(View arg0) {
v1.setText(t1.getText().toString());
}

EditText.getText() returns text from different view in onPause after rotating device

I have a strange problem here with an EditText view. In onPause() after an orientation change, the EditText view returns text via getText() that was never assigned to it.
In fact, the EditText object in question is only assigned an empty string.
In the error situation, it returns part(!) of a text that was assigned to a different TextView.
This does however not happen if onPause is triggered by pressing the "back" key.
Can anybody give me a clue? I do not understand what is happening here:
My activity:
package com.example.rotationtest;
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
private final String LOG_TAG = "Test";
private EditText mEditText;
private TextView mTextView;
private EditOk mEditOk;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView) findViewById(R.id.title);
mEditText = (EditText) findViewById(R.id.editText);
mEditText.setText("");
mEditOk = new EditOk() {
#Override
public void ok(String result) {
mTextView.setText(result);
}
};
editTextDialog(R.string.dialog_title, (CharSequence)getString(R.string.dialog_title), mTextView.getText().toString(), mEditOk);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_main, menu);
return true;
}
abstract class EditOk {
abstract public void ok(String result);
}
void editTextDialog(int titleId, CharSequence message, String text,
final EditOk ok) {
LayoutInflater inflater = (LayoutInflater) this.getSystemService(LAYOUT_INFLATER_SERVICE);
View layout = inflater.inflate(R.layout.edittext_dialog,
(ViewGroup) findViewById(R.id.layout_root));
TextView messageView = (TextView) layout.findViewById(R.id.text);
messageView.setText(message);
final EditText input = (EditText) layout.findViewById(R.id.editTextDialog);
Log.d(LOG_TAG, "input = " + input);
input.setTransformationMethod(android.text.method.SingleLineTransformationMethod.getInstance());
input.setText(text);
new AlertDialog.Builder(this)
.setTitle(titleId)
.setView(layout)
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
String newName = input.getText().toString();
if (newName.length() != 0) {
ok.ok(newName);
}
}})
.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
setResult(RESULT_CANCELED);
finish();
}
})
.create().show();
}
#Override
protected void onPause() {
super.onPause();
Log.d(LOG_TAG, "onPause: editText is " + mEditText.getText());
}
}
and layout:
<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" >
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="false"
android:text="#string/hello_world"
tools:context=".MainActivity" />
<EditText
android:id="#+id/editText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/title"
android:layout_centerHorizontal="true"
android:layout_marginTop="22dp"
android:ems="10"
android:inputType="textMultiLine" />
</RelativeLayout>
There is an AlertDialog involved which's layout is this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/layout_root" android:orientation="vertical"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:paddingLeft="20dp" android:paddingRight="20dp" android:paddingBottom="20dp" android:paddingTop="15dp" android:layout_gravity="top">
<TextView android:id="#+id/text" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:textColor="#FFF"
android:gravity="top" android:textSize="16sp" android:paddingBottom="20dp"/>
<EditText
android:id="#+id/editTextDialog"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<requestFocus></requestFocus>
</EditText>
</LinearLayout>
Now the steps are these:
Start activity in portrait orientation. A dialog pops up containing an EditText, prefilled with "Hello World!"
Append "zzz" to "Hello world!"
Press OK. "Hello world!zzz" is now assigned to the TextView on the Activity.
Now rotate the device to landscape. In onPause, mEditText.getText() now returns "zzz" although mEditText was not touched at all.
Any ideas? My expectation is that mEditText.getText() always returns "". If you repeat these steps but trigger onPause() by pressing back instead of rotating the device, getText() indeed does return "" as expected. Why not when rotating the device?
Additional note: I noticed that the soft keyboard seems to be necessary for the issue to appear. On an emulator with "Keyboard support = yes", the issue doesn't show up.

I had the same kind of issue with EditText. Looking in forums, I found that setting android:inputType="textNoSuggestions" fixes the issue, I don't know exactly how it works but, it worked fine on the Motorola Et1 tablet(Android 2.3).

I need assistence with android app life cycle

I've created this simple example to illustrate what i am trying to accomplish.
This is my first layout:
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.*;
import android.widget.RadioGroup.OnCheckedChangeListener;
public class LifeCycleActivity extends Activity implements OnCheckedChangeListener {
/** Called when the activity is first created. */
private RadioButton rbR, rbG, rbB;
private RadioGroup rg;
private Button next;
int color=0;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
rbR = (RadioButton) findViewById(R.id.radio0);
rbB = (RadioButton) findViewById(R.id.radio1);
rbG = (RadioButton) findViewById(R.id.radio2);
rg = (RadioGroup) findViewById(R.id.radioGroup1);
next = (Button) findViewById(R.id.button1);
final Intent it = new Intent(this, next.class);
final Bundle b = new Bundle();
rg.setOnCheckedChangeListener(this);
next.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
b.putInt("color", color);
it.putExtras(b);
startActivity(it);
}
});
}
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
if (checkedId==rbR.getId()) color=1;
if (checkedId==rbB.getId()) color=2;
if (checkedId==rbG.getId()) color=3;
}
}
This is the second layout:
import android.app.Activity;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.widget.*;
public class next extends Activity {
private LinearLayout ll;
private ImageView im;
private TextView tv;
private Button save;
private Bundle extras;
private int color=0;
private String selColor="";
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.next);
ll = (LinearLayout) findViewById(R.id.mainll);
ll.setOrientation(LinearLayout.VERTICAL);
im = new ImageView(this);
tv = new TextView(this);
save = new Button(this);
save.setText("save");
extras = getIntent().getExtras();
color = extras.getInt("color");
im.setImageResource(R.drawable.ic_launcher);
ll.addView(im);
if (color == 1) selColor = "RED";
if (color == 2) selColor = "BLUE";
if (color == 3) selColor = "GREEN";
tv.setText(selColor);
tv.setGravity(Gravity.CENTER);
ll.addView(tv);
ll.addView(save);
save.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
// here i want to save and exit
// so i can call onPause(), then finish()
// do not know how exactly since i have to follow some goals
// that i need for this example
}
});
}
}
I also have main.xml
<?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:orientation="vertical" >
<RadioGroup
android:id="#+id/radioGroup1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<RadioButton
android:id="#+id/radio0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="red" />
<RadioButton
android:id="#+id/radio1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="blue" />
<RadioButton
android:id="#+id/radio2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="green" />
</RadioGroup>
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="next" />
</LinearLayout>
AND next.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/mainll"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
</LinearLayout>
As you can see, based on color selection in first layout I dynamically build the second layout.
This is what I want to do, help me please (add code if possible):
on the second layout if I press save, I want to save app state (whatever I built on that page) and exit.
If I add one more button to create other dynamic objects on that layout (EditText with name, or another layout with different objects) than if user saves, he/she will also save new objects (This part can be done later)
if user saved that page once then i want him to be able to get the same app state that he/she was in before exiting (of course if he/she selects the same radio button).
If he/she selects another button, i do not need to show that previous state, since the selection is different.

The trick with sharedpreferences did for me. I was finally able to same and retrieve my data onPause and onStart. Even though this worked fine, I appreciate the answer of Kevin_Dingo which is defiantly more professional way to go.