导入图片到图片加以及搜索音乐

最新推荐文章于 2021-11-07 16:05:02 发布

最新推荐文章于 2021-11-07 16:05:02 发布 · 423 阅读

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#音乐 #Android

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本文介绍了如何在Android中进行图片保存及音频文件的查询与显示。具体包括使用ContentValues插入图片到系统相册，并通过ListActivity展示外部存储中所有音频文件的方法。

String filename = String.valueOf(System.currentTimeMillis()) ;

ContentValues values = new ContentValues();
values.put(Images.Media.TITLE, filename);
values.put(Images.Media.DATE_ADDED, System.currentTimeMillis());
values.put(Images.Media.MIME_TYPE, "image/jpeg");

Uri uri = context.getContentResolver().insert(Images.Media.EXTERNAL_CONTENT_URI, values);
try {
OutputStream outStream = context.getContentResolver().openOutputStream(uri);
mBitmap.compress(Bitmap.CompressFormat.JPEG, 90, outStream);
outStream.flush();
outStream.close();
Log.d("done","done");
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
2.

public class Main extends ListActivity {
private Cursor audioCursor;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    audioCursor = this.managedQuery(Audio.Media.EXTERNAL_CONTENT_URI,
        null, null, null, null);
    startManagingCursor(audioCursor);

    String[] columnsToMap = new String[] {Audio.Media.TITLE ,
                                          Audio.Media._ID};
    int[] mapTo = new int[] {android.R.id.text1,android.R.id.text2};

    ListAdapter mAdapter = new SimpleCursorAdapter(this,
        android.R.layout.two_line_list_item ,
        audioCursor, columnsToMap, mapTo);
    this.setListAdapter(mAdapter);
}
}