如何在Android中获取图库图像路径?

时间:2015-08-03 09:45:40

标签: java android android-5.0-lollipop

通过使用以下代码,我在4.4.4中获取图像路径,但是当我在棒棒糖5.0.1中使用它时,它无效。

String[] proj = {
                MediaStore.Images.Thumbnails._ID,
                MediaStore.Images.Thumbnails.DATA,
        };

        CursorLoader cursorLoader = new CursorLoader(
        this,  MediaStore.Images.Media.EXTERNAL_CONTENT_URI, proj, null, null, null);        

        Cursor imageCursor = cursorLoader.loadInBackground();

1 个答案:

答案 0 :(得分:0)

在需要时调用getSupportLoaderManager启动加载程序管理器。

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_CODE) {
        if (resultCode == Activity.RESULT_OK) {
            imageUri = data.getData();
            getSupportLoaderManager().initLoader(0, null, this);
        } else if (resultCode == Activity.RESULT_CANCELED) {
            Toast.makeText(this, "Action canceled.", Toast.LENGTH_LONG).show();
        } else { 
            Toast.makeText(this, "Action failed!", Toast.LENGTH_LONG).show();
        } 
    } 
} 

然后创建一个用于检索图像路径的游标加载器。

@Override 
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
    String[] projection = {
            MediaStore.Images.Media.DATA
    }; 
    CursorLoader cursorLoader = new CursorLoader(this, imageUri, projection, null, null, null);

    return cursorLoader; 
} 

当光标加载器完成时,它使用检索到的数据来更新UI。

@Override 
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
    if (data != null) {
        int columnIndex = data.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);

        data.moveToFirst();
        imagePath = data.getString(columnIndex);
    } else { 
        imagePath = imageUri.getPath(); 
    } 

    setupImageView(); 
}