I'm trying to do this application: http://developer.android.com/guide/topics/media/audio-capture.html
My problem is that when I comment the line setContentView(ll); everything is ok, but the app doesn't do anything. When I discomment that line, it appears the two buttoms but when I push one of them, the app crashes.
I'm using an Android 2.1 AVD, API 7 and I've added the sdcard, audioOutput and audioInput.
I've added the lines: in the manifest file.
Another observation that I've made is: I don't know exactly where the audio file is storaged but I'm not sure if there is any problem with this.
Thank you in advance!
My code is:
package com.example.helloandroid; import java.io.IOException; import android.app.Activity; import android.media.MediaPlayer; import android.media.MediaRecorder; import android.os.Bundle; import android.os.Environment; import android.widget.Button; import android.widget.LinearLayout; import android.view.View; import android.view.ViewGroup; import android.content.Context; import android.util.Log; /** * @author Natalia * */ public class HelloAndroidActivity extends Activity { private static final String LOG_TAG = "AudioRecordTest"; private static String mFileName = null; private RecordButton mRecordButton = null; private MediaRecorder mRecorder = null; private PlayButton mPlayButton = null; private MediaPlayer mPlayer = null; public static final int MODE_WORLD_WRITEABLE=0x00000002; //path = "/sdcard/hola.3gp"; private void onRecord(boolean start) { if (start) { startRecording(); } else { stopRecording(); } } private void onPlay(boolean start) { if (start) { startPlaying(); } else { stopPlaying(); } } private void startPlaying() { mPlayer = new MediaPlayer(); try { mPlayer.setDataSource(mFileName); mPlayer.prepare(); mPlayer.start(); } catch (IOException e) { Log.e(LOG_TAG, "prepare() failed"); } } private void stopPlaying() { mPlayer.release(); mPlayer = null; } private void startRecording() { mRecorder = new MediaRecorder(); mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC); mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); mRecorder.setOutputFile(mFileName); try { mRecorder.prepare(); } catch (IOException e) { Log.e(LOG_TAG, "prepare() failed"); } mRecorder.start(); } private void stopRecording() { mRecorder.stop(); mRecorder.release(); mRecorder = null; } class RecordButton extends Button { boolean mStartRecording = true; OnClickListener clicker = new OnClickListener() { public void onClick(View v) { onRecord(mStartRecording); if (mStartRecording) { setText("Stop recording"); } else { setText("Start recording"); } mStartRecording = !mStartRecording; } }; public RecordButton(Context ctx) { super(ctx); setText("Start recording"); setOnClickListener(clicker); } } class PlayButton extends Button { boolean mStartPlaying = true; OnClickListener clicker = new OnClickListener() { public void onClick(View v) { onPlay(mStartPlaying); if (mStartPlaying) { setText("Stop playing"); } else { setText("Start playing"); } mStartPlaying = !mStartPlaying; } }; public PlayButton(Context ctx) { super(ctx); setText("Start playing"); setOnClickListener(clicker); } } public void HelloAndroidActivity() { mFileName = Environment.getExternalStorageDirectory().getAbsolutePath(); mFileName += "/sdcard/hola.3gp"; } @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); LinearLayout ll = new LinearLayout(this); mRecordButton = new RecordButton(this); ll.addView(mRecordButton, new LinearLayout.LayoutParams( ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT, 0)); mPlayButton = new PlayButton(this); ll.addView(mPlayButton, new LinearLayout.LayoutParams( ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT, 0)); //setContentView(ll); } @Override public void onPause() { super.onPause(); if (mRecorder != null) { mRecorder.release(); mRecorder = null; } if (mPlayer != null) { mPlayer.release(); mPlayer = null; } } } I'm sorry because it is a little disaster!
These are my errors (I've just created a new Activity with the same code):
12-27 12:04:55.456: E/AndroidRuntime(411): FATAL EXCEPTION: main
12-27 12:04:55.456: E/AndroidRuntime(411): java.lang.IllegalStateException
12-27 12:04:55.456: E/AndroidRuntime(411): at android.media.MediaRecorder.start(Native Method)
12-27 12:04:55.456: E/AndroidRuntime(411): at Radar.packageRadar.app.Radar2Activity.startRecording(Radar2Activity.java:60)
12-27 12:04:55.456: E/AndroidRuntime(411): at Radar.packageRadar.app.Radar2Activity.onRecord(Radar2Activity.java:30)
12-27 12:04:55.456: E/AndroidRuntime(411): at Radar.packageRadar.app.Radar2Activity.access$0(Radar2Activity.java:28)
12-27 12:04:55.456: E/AndroidRuntime(411): at Radar.packageRadar.app.Radar2Activity$RecordButton$1.onClick(Radar2Activity.java:71)
12-27 12:04:55.456: E/AndroidRuntime(411): at android.view.View.performClick(View.java:2408)
12-27 12:04:55.456: E/AndroidRuntime(411): at android.view.View$PerformClick.run(View.java:8816)
12-27 12:04:55.456: E/AndroidRuntime(411): at android.os.Handler.handleCallback(Handler.java:587)
12-27 12:04:55.456: E/AndroidRuntime(411): at android.os.Handler.dispatchMessage(Handler.java:92)
12-27 12:04:55.456: E/AndroidRuntime(411): at android.os.Looper.loop(Looper.java:123)
12-27 12:04:55.456: E/AndroidRuntime(411): at android.app.ActivityThread.main(ActivityThread.java:4627)
12-27 12:04:55.456: E/AndroidRuntime(411): at java.lang.reflect.Method.invokeNative(Native Method)
12-27 12:04:55.456: E/AndroidRuntime(411): at java.lang.reflect.Method.invoke(Method.java:521)
12-27 12:04:55.456: E/AndroidRuntime(411): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-27 12:04:55.456: E/AndroidRuntime(411): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-27 12:04:55.456: E/AndroidRuntime(411): at dalvik.system.NativeStart.main(Native Method)
