android - 使用 Android 图库打开图像

Question

我需要在 Android Gallery 中打开一个特定的图像，但我尝试了一些代码但没有成功。这是我的代码：

Intent intent = new Intent();
intent.setAction(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse( "file:///Download/screenshot.jpg"), "image/*");
startActivity(intent);

Android Gallery 似乎已打开，但没有图像，它显示黑屏。

我正在使用 ICS 4.0 在 Samsung Galaxy Nexus 中尝试我的应用程序

希望任何人都可以帮助我。

谢谢，维克多。

Answer 1

Usew Button and EditID to "btnLoadPicture" and ImageView ID "imgView" 使用以下并重试

private static int RESULT_LOAD_IMAGE = 1;


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Button btnLoadPicture = (Button) findViewById(R.id.buttonLoadPicture);

    btnLoadPicture.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            Intent i = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

            startActivityForResult(i, RESULT_LOAD_IMAGE);

        }
    });
}


@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
        Uri selectedImage = data.getData();
        String[] filePathColumn = { MediaStore.Images.Media.DATA };

        Cursor cursor = getContentResolver().query(selectedImage,
                filePathColumn, null, null, null);
        cursor.moveToFirst();

        int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
        String picturePath = cursor.getString(columnIndex);
        cursor.close();
        // String picturePath contains the path of selected Image
        ImageView imageView = (ImageView) findViewById(R.id.imgView);
        imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
    }
}