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我一直在試圖播放MP3文件。它只是不會工作。Android音樂播放器準備方法失敗
我確實設法播放它，並在幾天前使用相同/相似的代碼向其添加各種功能。只是試圖讓它再次完成，現在這些錯誤...
有人可以指出錯誤，爲什麼會發生這種情況。
爲了說明我使用了不同格式的URI，它們都不起作用。也許想到它的準備方法。
package com.player.phoneagent.gui;
import java.io.IOException;
import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;
public class AndroidClientActivity extends Activity {
/** Called when the activity is first created. */
private MediaPlayer mp;
String path = "android.resource://com.player.phoneagent/raw/test";
ImageButton btn_prev;
ImageButton btn_play;
ImageButton btn_pause;
ImageButton btn_next;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btn_prev = (ImageButton) findViewById(R.id.ImageButton01);
btn_pause = (ImageButton) findViewById(R.id.ImageButton02);
btn_play = (ImageButton) findViewById(R.id.ImageButton03);
btn_next = (ImageButton) findViewById(R.id.ImageButton04);
mp = new MediaPlayer();
mp.setAudioStreamType(AudioManager.STREAM_MUSIC);
btn_play.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
try {
mp.setDataSource(path);
} catch (IllegalArgumentException e) {
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();
}
});
}
}
08-01 07:06:00.142: W/KeyCharacterMap(407): No keyboard for id 0
08-01 07:06:00.142: W/KeyCharacterMap(407): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
08-01 07:06:05.821: D/dalvikvm(407): GC_EXPLICIT freed 21K, 53% free 2568K/5379K, external 3207K/3962K, paused 55ms
08-01 07:06:20.311: D/dalvikvm(444): GC_EXTERNAL_ALLOC freed 52K, 53% free 2552K/5379K, external 1969K/2137K, paused 58ms
08-01 07:06:43.171: E/MediaPlayer(444): error (1, -2147483648)
08-01 07:06:43.171: W/System.err(444): java.io.IOException: Prepare failed.: status=0x1
08-01 07:06:43.171: W/System.err(444): at android.media.MediaPlayer.prepare(Native Method)
08-01 07:06:43.171: W/System.err(444): at com.player.phoneagent.gui.AndroidClientActivity$1.onClick(AndroidClientActivity.java:60)
08-01 07:06:43.171: W/System.err(444): at android.view.View.performClick(View.java:2485)
08-01 07:06:43.171: W/System.err(444): at android.view.View$PerformClick.run(View.java:9080)
08-01 07:06:43.181: W/System.err(444): at android.os.Handler.handleCallback(Handler.java:587)
08-01 07:06:43.181: W/System.err(444): at android.os.Handler.dispatchMessage(Handler.java:92)
08-01 07:06:43.181: W/System.err(444): at android.os.Looper.loop(Looper.java:123)
08-01 07:06:43.181: W/System.err(444): at android.app.ActivityThread.main(ActivityThread.java:3683)
08-01 07:06:43.181: W/System.err(444): at java.lang.reflect.Method.invokeNative(Native Method)
08-01 07:06:43.181: W/System.err(444): at java.lang.reflect.Method.invoke(Method.java:507)
08-01 07:06:43.181: W/System.err(444): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
08-01 07:06:43.181: W/System.err(444): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
08-01 07:06:43.181: W/System.err(444): at dalvik.system.NativeStart.main(Native Method)
08-01 07:06:43.181: E/MediaPlayer(444): start called in state 0
08-01 07:06:43.181: E/MediaPlayer(444): error (-38, 0)
08-01 07:06:43.181: E/MediaPlayer(444): Error (-38,0)
可能的重複：http://stackoverflow.com/questions/9008770/media-player-called-in-state-0-error-38-0 – Eric 2012-08-01 06:24:53
我看到了這個問題，但那個建議使用某種OnListener ......讓我感到懊惱的是，這曾經是完美的工作，我做了很少的改變，現在它拒絕工作 – Achilles 2012-08-01 06:33:33
也許回頭看看你的改變，讓他們單獨看看哪一個導致問題？ – Eric 2012-08-01 06:35:33