Am using the following code:---------------------
package com.CallRecorder;
import java.io.IOException;
import android.app.Activity;
import android.media.MediaPlayer;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
public class CallRecorder extends Activity {
Button start=(Button) findViewById(R.id.start);
Button stop = (Button) findViewById(R.id.stop);
Button play=(Button) findViewById(R.id.play);
String PATH="/mnt/sdcard/aaa.3gp";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
final MediaRecorder recorder=new MediaRecorder();
start.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile(PATH);
try {
recorder.prepare();
} catch (IllegalStateException e) {
Log.i("Start Recording", "prepare failed 1");
e.printStackTrace();
} catch (IOException e) {
Log.i("Start Recording", "prepare failed 2");
e.printStackTrace();
}
recorder.start();
}
});
stop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
recorder.stop();
recorder.reset();
recorder.release();
}
});
play.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
MediaPlayer mp=new MediaPlayer();
try {
mp.setDataSource(PATH);
} 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();
}
try {
mp.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mp.start();
}
});
}
}
When am running the code the application is "force closing"
The Log-report is:
05-26 21:45:35.041: WARN/dalvikvm(18659): threadid=1: thread exiting with
uncaught exception (group=0x4001d800)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): FATAL EXCEPTION: main
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): java.lang.RuntimeException:
Unable to instantiate activity
ComponentInfo{com.CallRecorder/com.CallRecorder.CallRecorder}:
java.lang.NullPointerException
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
android.app.ActivityThread.access$2300(ActivityThread.java:125)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
android.os.Handler.dispatchMessage(Handler.java:99)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
android.os.Looper.loop(Looper.java:123)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
android.app.ActivityThread.main(ActivityThread.java:4627)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
java.lang.reflect.Method.invokeNative(Native Method)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
java.lang.reflect.Method.invoke(Method.java:521)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
dalvik.system.NativeStart.main(Native Method)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): Caused by:
java.lang.NullPointerException
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
android.app.Activity.findViewById(Activity.java:1637)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
com.CallRecorder.CallRecorder.<init>(CallRecorder.java:15)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
java.lang.Class.newInstanceImpl(Native Method)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
java.lang.Class.newInstance(Class.java:1429)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
android.app.Instrumentation.newActivity(Instrumentation.java:1021)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
05-26 21:45:35.140: ERROR/AndroidRuntime(18659): ... 11 more
05-26 21:45:35.259: WARN/ActivityManager(74): Force finishing activity
com.CallRecorder/.CallRecorder
05-26 21:45:36.029: WARN/ActivityManager(74): Activity pause timeout for
HistoryRecord{44f3c178 com.CallRecorder/.CallRecorder}
Thanks, for any help in advance.
--
Regards,
Bikkanati Prabhakar.
E-Mail: [email protected]
Blog: http://LetsXploreIT.blogspot.com
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