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POThe application has stpped unexpectedly
 

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  1. POThe application has stpped unexpectedly
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    <p>When I start the following app in Android emulator the app stops with the following error message : "The application Player (process kilbo.net) has stpped unexpectedly. Please try again." There are no errors, warnings and I can't find anything in debugger related to the problem. This is a common problem I have, not just with this app.</p> <pre><code> package kilbo.net; import java.io.IOException; import android.app.Activity; import android.media.MediaPlayer; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.ProgressBar; import android.widget.TextView; public class Player extends Activity implements Runnable, OnClickListener{ private TextView Status; private ProgressBar progressBar; private Button StartMedia; private Button Stop; private MediaPlayer mp; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Status = (TextView) findViewById(R.id.Status); progressBar = (ProgressBar) findViewById(R.id.progressBar); StartMedia = (Button) findViewById(R.id.StartMedia); Stop = (Button) findViewById(R.id.Stop); //Removing this two lines "fixes" the problem. So the error is probably related to this StartMedia.setOnClickListener(this); Stop.setOnClickListener(this); } @Override public void onClick(View v) { if(v.equals(StartMedia)){ if(mp != null &amp;&amp; mp.isPlaying()) return; MediaPlayer mp = new MediaPlayer(); try { mp.setDataSource("http://kilbo.net/musik/Norrskenet.mp3"); } catch (IllegalArgumentException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IllegalStateException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } mp.start(); Status.setText("playingMedia"); progressBar.setVisibility(ProgressBar.VISIBLE); progressBar.setProgress(0); progressBar.setMax(mp.getDuration()); new Thread(this).start(); } if(v.equals(Stop) &amp;&amp; mp!=null){ mp.stop(); mp = null; Status.setText("Stop"); progressBar.setVisibility(ProgressBar.GONE); } } @Override public void run() { int CurrentPosition= 0; int total = mp.getDuration(); while(mp!=null &amp;&amp; CurrentPosition&lt;total){ try { Thread.sleep(1000); CurrentPosition= mp.getCurrentPosition(); } catch (InterruptedException e) { return; } catch (Exception e){ return; } progressBar.setProgress(CurrentPosition); } } } &lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" &gt; &lt;Button id="@+id/Stop" android:layout_width="125px" android:layout_height="50px" android:background="#FF222222" android:text="Start" /&gt; &lt;Button id="@+id/StartMedia" android:layout_width="125px" android:layout_height="50px" android:background="#FF222222" android:text="Start" /&gt; &lt;ProgressBar id="@+id/progressBar" android:layout_width="125px" android:layout_height="50px" android:background="#FF222222" android:text="Start" style="?android:attr/progressBarStyleHorizontal" /&gt; &lt;TextView id="@+id/Status" android:layout_width="125px" android:layout_height="50px" android:background="#FF222222" android:text="Start" /&gt; &lt;/LinearLayout&gt; </code></pre>
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    1. COFind Logcat. Use it. Then fix the missing android:id attributes in layout/main.xml
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      1. USReuben Scratton
    2. CODoes StartMedia.setOnClickListener(this); need a separate id in main.xml, or should I add something to <Button id="@+id/StartMedia" android:layout_width="125px" android:layout_height="50px" android:background="#FF222222" android:text="Start" />? I have found the onClick attribute, but what am I supposed to put there? android:onClick="onClick"
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