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POHaving issue with Intent Activities and Alert Dialogs
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copied!<p>I was wondering if someone could help me. It may be good to have a fresh pair of eyes to tell me what I am doing wrong because I just can't find it. It's probably something trivial, but I cannot see it. I basically have a button that when clicked brings up a custom dialog and asks the user to make a choice between an SD Card or Device memory. I feel I have everything right for the most part it's just giving me an error similar to: onClick error on line71..</p> <p>Can anyone else see a problem..</p> <pre><code> public class MediaActivity extends Activity { /** Called when the activity is first created. */ AlertDialog.Builder builder; AlertDialog alertDialog; ImageButton sdImage; ImageButton deviceImage; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Button startApp = (Button) findViewById(R.id.startButton); startApp.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { Context mContext = MediaActivity.this; LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(LAYOUT_INFLATER_SERVICE); View layout = inflater.inflate(R.layout.custlayout, (ViewGroup) findViewById(R.id.layout_root)); TextView text = (TextView) layout.findViewById(R.id.text); //text.setText("Upload an Image or Video"); builder = new AlertDialog.Builder(mContext); builder.setView(layout); alertDialog = builder.create(); sdImage= (ImageButton) findViewById(R.id.sdImageButton); deviceImage = (ImageButton) findViewById(R.id.deviceImageButton); sdImage.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { // Write your code here to invoke YES event Intent goToSD = new Intent(arg0.getContext(), Sdcard.class); startActivity(goToSD); } }); deviceImage.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub } }); // Showing Alert Message alertDialog.show(); } }); } } </code></pre> <p>Thanks a bunch I really appreciate this since I've been having trouble with this for awhile. It's probably some kind of a dumb mistake that I'm overlooking.</p> <p>Thank you again!</p> <p>UPDATE LOGCAT:</p> <p>06-26 17:54:35.119: D/AndroidRuntime(24486): Shutting down VM 06-26 17:54:35.119: W/dalvikvm(24486): threadid=1: thread exiting with uncaught exception (group=0x40015560) 06-26 17:54:35.119: E/AndroidRuntime(24486): FATAL EXCEPTION: main 06-26 17:54:35.119: E/AndroidRuntime(24486): java.lang.NullPointerException 06-26 17:54:35.119: E/AndroidRuntime(24486): at my.edu.org.MediaActivity$1.onClick(MediaActivity.java:71) 06-26 17:54:35.119: E/AndroidRuntime(24486): at android.view.View.performClick(View.java:2485) 06-26 17:54:35.119: E/AndroidRuntime(24486): at android.view.View$PerformClick.run(View.java:9080) 06-26 17:54:35.119: E/AndroidRuntime(24486): at android.os.Handler.handleCallback(Handler.java:587) 06-26 17:54:35.119: E/AndroidRuntime(24486): at android.os.Handler.dispatchMessage(Handler.java:92) 06-26 17:54:35.119: E/AndroidRuntime(24486): at android.os.Looper.loop(Looper.java:130) 06-26 17:54:35.119: E/AndroidRuntime(24486): at android.app.ActivityThread.main(ActivityThread.java:3683) 06-26 17:54:35.119: E/AndroidRuntime(24486): at java.lang.reflect.Method.invokeNative(Native Method) 06-26 17:54:35.119: E/AndroidRuntime(24486): at java.lang.reflect.Method.invoke(Method.java:507) 06-26 17:54:35.119: E/AndroidRuntime(24486): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:850) 06-26 17:54:35.119: E/AndroidRuntime(24486): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:608) 06-26 17:54:35.119: E/AndroidRuntime(24486): at dalvik.system.NativeStart.main(Native Method) ////////////////////// implementation of onClick from droider's suggestions.</p> <pre><code>@Override public void onClick(View v) { switch(v.getId()) { case R.id.sdImageButton: Intent goToSD = new Intent(v.getContext(), Sdcard.class); startActivity(goToSD); Toast.makeText(getApplicationContext(), "sdclicked", Toast.LENGTH_SHORT).show(); break; case R.id.deviceImageButton: break; default: break; } } </code></pre>

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