[英]Problems with loading sounds from Sd-Card
我有一個應從SD卡加載聲音的應用程序,然后單擊按鈕播放它。 當我單擊按鈕時,我在LogCat中得到這些消息:無法創建外部文件目錄,SoundPool錯誤加載/sound1.mp3,示例0未就緒,這是我的代碼:
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錯誤:
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權限會出現以下錯誤:
11-04 19:58:01.729: E/SoundPool(8022): error loading /mnt/sdcard/Android/data/com.example.idea/files/sound1.mp3
出現此錯誤:
11-04 19:58:01.729: E/SoundPool(8022): error loading /mnt/sdcard/Android/data/com.example.idea/files/sound1.mp3
您說:
文件存在,並且在/ mnt / sdcard /文件夾中。 應用程序應在外部存儲中搜索sound1.mp3並將其加載(如果存在)。
但是, /mnt/sdcard/
不是/mnt/sdcard/Android/data/com.example.idea/files/
只需將您的sound1.mp3
文件移動到應用程序默認的sdcard文件夾中,SoundPool將能夠加載它。
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