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POAndroid: How to have list of checkbox with image in AlertDialog
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copied!<p><img src="https://i.stack.imgur.com/Zpvtm.png" alt="enter image description here"></p> <p>I need my AlertDialog like the above image but <strong>WITH Checkbox</strong></p> <p>I had checked this <a href="https://stackoverflow.com/questions/3211927/android-image-inside-single-select/3281239#3281239">Post</a> and i had created the following codes</p> <p><strong>animal_text.xml</strong></p> <pre><code><?xml version="1.0" encoding="utf-8"?> <LinearLayout android:padding="10dp" android:layout_height="fill_parent" android:layout_width="fill_parent" android:orientation="horizontal" android:id="@+id/layout_root" xmlns:android="http://schemas.android.com/apk/res/android"> <CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/miastorow_text" android:layout_width="fill_parent" android:layout_height="?android:attr/listPreferredItemHeight" android:textAppearance="?android:attr/textAppearanceLarge" android:gravity="center_vertical" android:checkMark="?android:attr/listChoiceIndicatorMultiple" android:paddingLeft="6dip" android:paddingRight="6dip" android:textColor="#000"/> </LinearLayout> </code></pre> <p><strong>main.xml</strong></p> <pre><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:orientation="vertical" > <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Button" /> </LinearLayout> </code></pre> <p><strong>ImageActivity.java</strong></p> <pre><code>package com.imagetest; import android.app.Activity; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.DialogInterface.OnClickListener; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.CheckedTextView; import android.widget.ListAdapter; public class ImageActivity extends Activity { /** Called when the activity is first created. */ private static final String TAG = "HelloWorld"; Animal[] _animals; Button btnStart; public static int count =0; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); System.out.println("on create"); setContentView(R.layout.main); loadAnimals(); btnStart = (Button)findViewById(R.id.button1); final Button button = (Button) findViewById(R.id.button1); button.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { System.out.println("##########"); handlePush(v); } }); //btnStart.setOnClickListener((android.view.View.OnClickListener) btnStartListener); System.out.println("on create after main"); System.out.println("on create before load animals"); } private void loadAnimals() { System.out.println("########## 1 "); _animals = new Animal[3]; // define the display string, the image, and the value to use // when the choice is selected _animals[0] = new Animal( "dog", getImg( R.drawable.dog),"dog_sitting" ); _animals[1] = new Animal( "cat", getImg( R.drawable.cat),"cat_sitting" ); _animals[1] = new Animal( "bird", getImg( R.drawable.bird),"bird_sitting" ); } private Drawable getImg( int res ) { System.out.println("########## 3 "); Drawable img = getResources().getDrawable( res ); img.setBounds( 0, 0, 48, 48 ); return img; } public void handlePush( View target ) { System.out.println("########## button clicked handle push"); // define the list adapter with the choices ListAdapter adapter = new AnimalAdapter( this, _animals ); final AlertDialog.Builder ad = new AlertDialog.Builder(this); // define the alert dialog with the choices and the action to take // when one of the choices is selected ad.setSingleChoiceItems( adapter, -1, new OnClickListener() { public void onClick(DialogInterface dialog, int which) { // a choice has been made! String selectedVal = _animals[which].getVal(); Log.d(TAG, "chosen " + selectedVal ); dialog.dismiss(); } }); ad.show(); } static class AnimalAdapter extends ArrayAdapter<Animal> { private static final int RESOURCE = R.layout.animal_text; private LayoutInflater inflater; static class ViewHolder { CheckedTextView nameTxVw; } //@SuppressWarnings("unchecked") public AnimalAdapter(Context context, Animal[] objects) { super(context, RESOURCE, objects); inflater = LayoutInflater.from(context); } @Override public View getView(int position, View convertView, ViewGroup parent) { count=count+1; System.out.println("################ "+count+" position "+position+" parent "+parent); ViewHolder holder; System.out.println("########## getview outside if 1 "+count); if ( convertView == null ) { System.out.println("########## getview if 1 "+count); // inflate a new view and setup the view holder for future use convertView = inflater.inflate( RESOURCE, null ); holder = new ViewHolder(); holder.nameTxVw = (CheckedTextView) convertView.findViewById(R.id.miastorow_text); convertView.setTag( holder ); } else { System.out.println("########## getview else 1 "+count+" convert "+convertView.toString()); // view already defined, retrieve view holder holder = (ViewHolder) convertView.getTag(); } Animal cat = (Animal) getItem( position ); if ( cat == null ) { System.out.println("########## getview if 2"); //Log.e( TAG, “Invalid category for position: ”+position); } holder.nameTxVw.setText( cat.getName() ); holder.nameTxVw.setCompoundDrawables( cat.getImg(), null, null, null ); return convertView; } } class Animal { private String _name; private Drawable _img; private String _val; public Animal( String name, Drawable img, String val ) { System.out.println("########## 2"); _name = name; _img = img; _val = val; } public String getName() { return _name; } public Drawable getImg() { return _img; } public String getVal() { return _val; } } } </code></pre> <p>I am getting a <strong>Null Pointer Exception</strong> .. I dont know how to resolve it, as iam new to Android.. PLZ Help me as soon as possible.</p> <p>And My logcat details are as follows</p> <pre><code>07-26 12:14:12.436: DEBUG/AndroidRuntime(13275): Shutting down VM 07-26 12:14:12.436: WARN/dalvikvm(13275): threadid=1: thread exiting with uncaught exception (group=0x400205a0) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): FATAL EXCEPTION: main 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): java.lang.NullPointerException 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at com.imagetest.ImageActivity$AnimalAdapter.getView(ImageActivity.java:130) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.widget.AbsListView.obtainView(AbsListView.java:1409) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.widget.ListView.measureHeightOfChildren(ListView.java:1264) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.widget.ListView.onMeasure(ListView.java:1127) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.view.View.measure(View.java:8526) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3228) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.widget.LinearLayout.measureVertical(LinearLayout.java:386) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.widget.LinearLayout.onMeasure(LinearLayout.java:309) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.view.View.measure(View.java:8526) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3228) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1017) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.widget.LinearLayout.measureVertical(LinearLayout.java:386) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.widget.LinearLayout.onMeasure(LinearLayout.java:309) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at com.android.internal.widget.WeightedLinearLayout.onMeasure(WeightedLinearLayout.java:60) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.view.View.measure(View.java:8526) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3228) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.view.View.measure(View.java:8526) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3228) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.widget.FrameLayout.onMeasure(FrameLayout.java:250) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.view.View.measure(View.java:8526) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.view.ViewRoot.performTraversals(ViewRoot.java:902) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.view.ViewRoot.handleMessage(ViewRoot.java:1957) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.os.Handler.dispatchMessage(Handler.java:99) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.os.Looper.loop(Looper.java:150) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at android.app.ActivityThread.main(ActivityThread.java:4277) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at java.lang.reflect.Method.invokeNative(Native Method) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at java.lang.reflect.Method.invoke(Method.java:507) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 07-26 12:14:12.456: ERROR/AndroidRuntime(13275): at dalvik.system.NativeStart.main(Native Method) 07-26 12:14:12.476: WARN/ActivityManager(124): Force finishing activity com.imagetest/.ImageActivity 07-26 12:14:12.976: WARN/ActivityManager(124): Activity pause timeout for HistoryRecord{4081ff48 com.imagetest/.ImageActivity} 07-26 12:14:13.056: INFO/CarouselTimeLog(259): onStart() finish: 1343285053068 </code></pre>

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