我正在构建一个需要播放录制声音的录音机。我在播放音频时遇到了很多麻烦。我知道该文件存在,因为我将它隔离到我的 SD 卡上的一个文件夹中,但由于某种原因它无法播放它。
这是我的代码:
public class RecorderEditActivity extends SherlockActivity implements
DatabaseHelper.MetadataListener {
private long position;
private Button playButton = null;
private TextView date = null;
private EditText title = null;
private EditText notes = null;
private Button saveButton = null;
private MediaPlayer mediaPlayer = null;
private boolean isPlaying = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.edit_item);
position = getIntent().getExtras().getLong(DatabaseHelper.KEY_ROWID);
playButton = (Button) findViewById(R.id.play);
date = (TextView) findViewById(R.id.recording_date);
title = (EditText) findViewById(R.id.edit_title);
notes = (EditText) findViewById(R.id.edit_notes);
saveButton = (Button) findViewById(R.id.save_edit_button);
mediaPlayer = new MediaPlayer();
DatabaseHelper.getInstance(getApplicationContext()).getMetadataAsync(
position, this);
playButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (!isPlaying) {
playButton.setText(R.string.stop_text);
try {
mediaPlayer = new MediaPlayer();
mediaPlayer
.setDataSource("sdcard/test/"
+ date.toString() + ".3gp");
mediaPlayer.prepare();
mediaPlayer.start();
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
@Override
public void onCompletion(MediaPlayer mp) {
mp.stop();
}
});
} catch (Exception e) {
Log.e(e.getClass().getName(), e.getMessage(), e);
}
} else {
playButton.setText(R.string.play_text);
mediaPlayer.release();
}
isPlaying = !isPlaying;
}
});
以下是来自 LogCat 的错误:
03-20 00:33:40.963: E/MediaPlayer(21268): error (1, -2147483648)
03-20 00:33:40.963: E/java.io.IOException(21268): Prepare failed.: status=0x1
03-20 00:33:40.963: E/java.io.IOException(21268): java.io.IOException: Prepare failed.: status=0x1
03-20 00:33:40.963: E/java.io.IOException(21268): at android.media.MediaPlayer.prepare(Native Method)
03-20 00:33:40.963: E/java.io.IOException(21268): at com.packagename.soundrecorder.RecorderEditActivity$1.onClick(RecorderEditActivity.java:56)
03-20 00:33:40.963: E/java.io.IOException(21268): at android.view.View.performClick(View.java:4204)
03-20 00:33:40.963: E/java.io.IOException(21268): at android.view.View$PerformClick.run(View.java:17355)
03-20 00:33:40.963: E/java.io.IOException(21268): at android.os.Handler.handleCallback(Handler.java:725)
03-20 00:33:40.963: E/java.io.IOException(21268): at android.os.Handler.dispatchMessage(Handler.java:92)
03-20 00:33:40.963: E/java.io.IOException(21268): at android.os.Looper.loop(Looper.java:137)
03-20 00:33:40.963: E/java.io.IOException(21268): at android.app.ActivityThread.main(ActivityThread.java:5041)
03-20 00:33:40.963: E/java.io.IOException(21268): at java.lang.reflect.Method.invokeNative(Native Method)
03-20 00:33:40.963: E/java.io.IOException(21268): at java.lang.reflect.Method.invoke(Method.java:511)
03-20 00:33:40.963: E/java.io.IOException(21268): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
03-20 00:33:40.963: E/java.io.IOException(21268): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
03-20 00:33:40.963: E/java.io.IOException(21268): at dalvik.system.NativeStart.main(Native Method)
希望有人可以帮助我解释和解决这个问题。我做了很多研究,但我所做的没有任何帮助。谢谢 :)