Force close error expecting irregulary
===

I have problem. I created an application which loads random layour from resources and I have problem because program shows random layout and closes , sometimes after 2 times and sometimes after a dozen, and I dont know where is a problem, I tried to run it on my phone and I added in the manifest write_external_storage permission, and still the same error.Please help me, and try to resolve this problem.

here is my code in :

java :
    
    package ka.ka.ka;

    import java.util.Random;

    import android.app.Activity;
    import android.os.Bundle;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.widget.Button;
 
    public class KAMASActivity extends Activity implements OnClickListener {
	Button button1;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
      button1 = (Button) findViewById(R.id.button1) ;
      button1.setOnClickListener(this);
    
    }
	@Override
	public void onClick(View v) {
		
		   int min = 1;
			int max = 6;
			int i1=0;		
			Random r = new Random();
			i1 = r.nextInt(max - min + 1) + min;
			if(i1==1){setContentView(R.layout.image1);
			button1 = (Button) findViewById(R.id.button1) ;
			button1.setOnClickListener(this);}
			if(i1==2){setContentView(R.layout.image2);
			button1 = (Button) findViewById(R.id.button1) ;
			button1.setOnClickListener(this);}
			if(i1==3){setContentView(R.layout.image3);
			button1 = (Button) findViewById(R.id.button1) ;
			button1.setOnClickListener(this);}
			if(i1==4){setContentView(R.layout.image4);
			button1 = (Button) findViewById(R.id.button1) ;
			button1.setOnClickListener(this);}
			if(i1==5){setContentView(R.layout.image5);
			button1 = (Button) findViewById(R.id.button1) ;
			button1.setOnClickListener(this);}
			if(i1==6){setContentView(R.layout.image6);
			button1 = (Button) findViewById(R.id.button1) ;
			button1.setOnClickListener(this);
			}
			}
			
Android Manifest :


    <?xml version="1.0" encoding="utf-8"?>
    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="ka.ka.ka"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="7" />
	 <uses-permission android:name="android.permission.ACCESS_CHECKIN_PROPERTIES" />
   	 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 
           
      <application
        android:icon="@drawable/ikona"
        android:label="@string/app_name" >
        <activity
            android:name=".KAMASActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

    </manifest>

And he is logcat :

    07-10 10:58:51.062: D/ddm-heap(218): Got feature list request
    07-10 10:58:51.311: D/dalvikvm(218): GC freed 506 objects / 46032 bytes in 122ms
    07-10 10:59:30.081: D/AndroidRuntime(218): Shutting down VM
    07-10 10:59:30.081: W/dalvikvm(218): threadid=3: thread exiting with uncaught exception     (group=0x4001b188)
    07-10 10:59:30.081: E/AndroidRuntime(218): Uncaught handler: thread main exiting due to uncaught exception
    07-10 10:59:30.102: E/AndroidRuntime(218): java.lang.NullPointerException
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at   ka.ka.ka.KAMASActivity.onClick(KAMASActivity.java:32)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at android.view.View.performClick(View.java:2364)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at android.view.View.onTouchEvent(View.java:4179)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at  android.widget.TextView.onTouchEvent(TextView.java:6541)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at android.view.View.dispatchTouchEvent(View.java:3709)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at    android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
    0 7-10 10:59:30.102: E/AndroidRuntime(218): 	at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:884)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at  com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow. java:1659)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at   com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at android.app.Activity.dispatchTouchEvent(Activity.java:2061)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at android.view.ViewRoot.handleMessage(ViewRoot.java:1691)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at android.os.Handler.dispatchMessage(Handler.java:99)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at android.os.Looper.loop(Looper.java:123)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at android.app.ActivityThread.main(ActivityThread.java:4363)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at java.lang.reflect.Method.invokeNative(Native Method)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at java.lang.reflect.Method.invoke(Method.java:521)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
    07-10 10:59:30.102: E/AndroidRuntime(218): 	at dalvik.system.NativeStart.main(Native Method)
    07-10 10:59:30.121: I/dalvikvm(218): threadid=7: reacting to signal 3
    07-10 10:59:30.121: E/dalvikvm(218): Unable to open stack trace file '/data/anr/traces.txt': Permission denied
    07-10 10:59:32.562: I/Process(218): Sending signal. PID: 218 SIG: 9


