从Sd-Card加载声音的问题

时间:2012-11-04 18:50:49

标签: android audio sd-card

我有一个应用程序应该从SD卡加载声音,然后单击按钮播放它。当我单击按钮时,我在LogCat中收到这些消息:无法创建外部文件目录,SoundPool错误加载/sound1.mp3,样本0未准备好 这是我的代码:

import java.io.File;

import android.media.AudioManager;
import android.media.SoundPool;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.view.Menu;
import android.view.View;

public class MainActivity extends Activity {
SoundPool sp;
int mSoundId;
int mStreamId = 0;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        sp = new SoundPool(5, AudioManager.STREAM_MUSIC, 0);
        String path = getFullFilePath(getApplicationContext(), "sound1.mp3");
        mSoundId = sp.load(path, 1);

    }
    private String getFullFilePath(Context context, String filename) {  
        File directory = context.getExternalFilesDir(null);
        File file = new File(directory, filename);
        if (!file.canRead()) {
            // error handling
        }
        return file.getAbsolutePath();  
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
    public void button1(View view){


        if (mStreamId != 0) {
            sp.stop(mStreamId);
        }
        mStreamId = sp.play(mSoundId, 1, 1, 1, 0, 1f);
    }
}

我的LogCat错误:

11-04 18:56:34.499: D/dalvikvm(6547): GC_EXTERNAL_ALLOC freed 46K, 51% free 2686K/5379K, external 0K/0K, paused 57ms
11-04 18:56:34.539: W/ApplicationContext(6547): Unable to create external files directory
11-04 18:58:02.129: E/SoundPool(6644): error loading /sound1.mp3

添加WRITE_EXTERNAL_STORAGE Premission会出现此错误:

11-04 19:58:01.729: E/SoundPool(8022): error loading /mnt/sdcard/Android/data/com.example.idea/files/sound1.mp3

1 个答案:

答案 0 :(得分:0)

出现此错误:

11-04 19:58:01.729: E/SoundPool(8022): error loading /mnt/sdcard/Android/data/com.example.idea/files/sound1.mp3

你说:

  

文件存在且位于/ mnt / sdcard /文件夹中。应用程序应搜索外部存储器sound1.mp3并加载它(如果存在)。

但是,/mnt/sdcard/不是/mnt/sdcard/Android/data/com.example.idea/files/只是将您的sound1.mp3文件移动到您的应用程序默认sdcard文件夹,而SoundPool将能够加载它。