MediaStore用法示例

MediaStore类向存储在设备上（无论是内部存储器还是外部存储器中）的媒体提供了一接口。MediaStore还提供了API来操作媒体。

这些API中包含在设备上搜索特定类型的媒体的机制，用于将音频和视频录制到存储器的Intent，以及建立播放列表的方式。

MediaStore便于简化操作。

下面是使用Intent来录制音频和拍照的简单示例。

public class MediaStoreTest extends Activity { private static final String TAG = "MediaStoreTest"; private static final int RECORD_SOUND = 0; private static final int IMAGE_CAPTURE = 1; private Button btnRecord; private Button btnPhoto; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); btnRecord = (Button)findViewById(R.id.btnRecord); btnRecord.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub startRecording(); } }); btnPhoto = (Button)findViewById(R.id.btnPhoto); btnPhoto.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub takePhoto(); } }); } public void startRecording() { Intent intent = new Intent("android.provider.MediaStore.RECORD_SOUND"); startActivityForResult(intent, RECORD_SOUND); } public void takePhoto() { Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); String strFilePath = Environment.getExternalStorageDirectory() + "/take_photo/" + getDate() + ".jpeg"; Log.d(TAG, "strFilePath:" + strFilePath); Uri uri = Uri.fromFile(new File(strFilePath)); intent.putExtra(MediaStore.EXTRA_OUTPUT, uri); // 设置照片的保存位置 startActivityForResult(intent, IMAGE_CAPTURE); } /** * 获取系统时间 * @return */ public static String getDate(){ Calendar ca = Calendar.getInstance(); int year = ca.get(Calendar.YEAR); // 获取年份 int month = ca.get(Calendar.MONTH); // 获取月份 int day = ca.get(Calendar.DATE); // 获取日 int minute = ca.get(Calendar.MINUTE); // 分 int hour = ca.get(Calendar.HOUR); // 小时 int second = ca.get(Calendar.SECOND); // 秒 int millisecond = ca.get(Calendar.MILLISECOND); // 毫秒 String date = "" + year + (month + 1 ) + day + hour + minute + second + millisecond; return date; } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { // TODO Auto-generated method stub switch(requestCode) { case RECORD_SOUND: if (resultCode == RESULT_OK) { Uri recordAudioPath = data.getData(); Log.d(TAG, "recordAudioPath:" + recordAudioPath); } break; case IMAGE_CAPTURE: // if (resultCode == RESULT_OK) { // Bitmap bmp = (Bitmap)data.getExtras().get("data"); // Log.d(TAG, "bmp width:" + bmp.getWidth() + ", height:" + bmp.getHeight()); // } break; default: break; } super.onActivityResult(requestCode, resultCode, data); } }