title: Unfortunately, androiddemo(project name) has stopped
body: <p>I am new with android this is my 1st demo app. I am trying to navigate from one page to another. But i am not able to navigate to another page i have a button in may main xml file and on licking it is moving to an another xml nextpage. I have 2 java class : 1st MianAcitvity, nextpagejava. 2 xml : activity_main, nextpage</p>
  
  <p>My code : manifest</p>
  
  <pre><code>      &lt;activity
        android:name="com.example.androiddemo.MainActivity"
        android:label="@string/app_name" &gt;
        &lt;intent-filter&gt;
            &lt;action android:name="android.intent.action.MAIN" /&gt;
  
              &lt;category android:name="android.intent.category.LAUNCHER" /&gt;
           &lt;/intent-filter&gt;
       &lt;/activity&gt;
          &lt;activity android:name="nextpagejava" &gt;&lt;/activity&gt;
  </code></pre>
  
  <p>MainActivity.java</p>
  
  <pre><code>package com.example.androiddemo;
    import android.os.Bundle; 
     import android.app.Activity; 
     import android.content.Intent; 
     import android.drm.DrmStore.Action;
    import android.view.Menu; 
     import android.view.View; 
    import android.view.View.OnClickListener; 
      import android.widget.Button;
  
      public class MainActivity extends Activity implements OnClickListener {
  
        @Override
       protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
  
            Button bt = (Button)findViewById(R.id.bnt);
             bt.setOnClickListener(new View.OnClickListener() {
  
             @Override
             public void onClick(View v) {
                  / / TODO Auto-generated method stub
  
               }
              }); 
              }
  
               @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;
              }
  
               @Override
              public void onClick(View v) {
                // TODO Auto-generated method stub
              switch(v.getId()){
                case R.id.bnt:
                       Intent in = new Intent(this, nextpagejava.class);
                       startActivity(in);
                 break;
  
  
                }
             }
            }
  </code></pre>
  
  <p>acitivity_main.xml</p>
  
  <pre><code>           &lt;LinearLayout  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" &gt;
  
                 &lt;TextView 
             android:id="@+id/clicktxt"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="Click"        
           /&gt;
  
             &lt;Button
             android:id="@+id/bnt"
              android:layout_height="wrap_content"
              android:layout_width="wrap_content"
             android:text="Click Me"
            /&gt;
  </code></pre>
  
  <p>nextpage.xml</p>
  
  <pre><code>           &lt;TextView 
               android:layout_width="match_parent"
                android:layout_height="wrap_content"
                 android:text="I am i a next page..."
               /&gt;
  
              &lt;Button 
                android:id="@+id/btn1"
                 android:layout_width="match_parent"
                  android:layout_height="wrap_content"
                android:text="Back"
               /&gt;
  </code></pre>
  
  <p>nextpagejava.java</p>
  
  <pre><code>         package com.example.androiddemo;
  
            import android.app.Activity;
            import android.os.Bundle;
            import android.view.View;
            import android.view.View.OnClickListener;
              import android.widget.Button;
  
             public class nextpagejava extends Activity implements OnClickListener{
  
         @Override
          protected void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);
                setContentView(R.layout.activity_main);
  
              Button bt = (Button)findViewById(R.id.btn1);
              bt.setOnClickListener(this);
              }
  
            @Override
             public void onClick(View v) {
              // TODO Auto-generated method stub
  
          }
           }
  </code></pre>
  
  <p>i am getting message that "Unfortunately, androiddemo has stopped" this message as a popup.</p>
  
  <p>can anybody tell me why this error is coming and please tell me from where i can find line by line debug logs. </p>