如何将图像从网格视图传递到 android 中的另一个 activity

Question

我有一个带有图像的网格视图，在图像上单击特定图像应该传递给下一个 activity.Now 如果使用单个可绘制图像，此步骤很简单，但是如何在处理图像时获得结果在网格中 view.Images 存储在客户端。这是我的带有网格视图的 activity1 代码

public class GridActivity extends AppCompatActivity {

GridView androidGridView;

Integer[] imageIDs = {
        R.drawable.alien, R.drawable.capt_spaulding, R.drawable.captain,
        R.drawable.stark, R.drawable.casper, R.drawable.captainamerica,
        R.drawable.spidey, R.drawable.abra, R.drawable.bulbasaur
};


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_grid);

    androidGridView = (GridView) findViewById(R.id.avatar_grid);
    androidGridView.setAdapter(new ImageAdapterGridView(this));

    androidGridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            Bitmap bmp = BitmapFactory.decodeResource(getResources(),R.drawable.captain);
            ByteArrayOutputStream stream = new ByteArrayOutputStream();
            bmp.compress(Bitmap.CompressFormat.PNG, 100, stream);
            byte[] byteArray = stream.toByteArray();

            Toast.makeText(getBaseContext(), "Grid Item " +
                    (position + 1) + " Selected", Toast.LENGTH_LONG).show();

            Intent intent = new Intent(GridActivity.this,FinalActivity.class);
            gosudo.putExtra("picture", byteArray);
            startActivity(intent);
        }
    });

}

public class ImageAdapterGridView extends BaseAdapter {
    private Context mContext;

    public ImageAdapterGridView(Context c) {
        mContext = c;
    }

    public int getCount() {
        return imageIDs.length;
    }

    public Object getItem(int position) {
        return null;
    }

    public long getItemId(int position) {
        return 0;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ImageView mImageView;

        if (convertView == null) {
            mImageView = new ImageView(mContext);
            mImageView.setLayoutParams(new GridView.LayoutParams(130, 130));
            mImageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
            mImageView.setPadding(16, 16, 16, 16);
        } else {
            mImageView = (ImageView) convertView;
        }
        mImageView.setImageResource(imageIDs[position]);
        return mImageView;
}
}
}

这是显示所选图像的 finalActivity

public class FinalActivity extends AppCompatActivity {


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_final);

    Bundle extras = getIntent().getExtras();
    byte[] byteArray = extras.getByteArray("picture");

    Bitmap bmp = BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length);
   //image view where the chosen image should set
    ImageView image = (ImageView) findViewById(R.id.selectedimageview);

    image.setImageBitmap(bmp);

}
}

我遇到过 stackquestions 之类的问题，但没有成功。

Answer 1

由于您正在使用资源，因此您可以传递 ID。

 Intent intent = new Intent(this, FinalActivity.class);
 intent.putExtra("imageId",imageId);

最后 Activity:

 int imageId = getIntent().getIntExtra("imageId");
 image.setImageResource(imageId);

Answer 2

@Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

           //get image resource based on adapter click position.
           int imageRes = imageIDs[position];

           //then pass it with the intent.
           Intent intent = new Intent(GridActivity.this,FinalActivity.class);
           intent.putExtra("IMAGE_RES", imageRes);
           startActivity(intent);
        }
    });

    //In FinalActivity.class
    //retrieve the resource clicked and set to the imageView.
    int imageRes = getIntent().getExtra("IMAGE_RES");
    image.setImageResource(imageRes);

Answer 3

所以这是解决方案，网格活动

 int imageRes = imageIDs[position];

            Intent intent = new Intent(GridActivity.this,FinalActivity.class);
            intent.putExtra("IMAGE_RES", imageRes);
            startActivity(intent);

在最后一幕

 ImageView image = (ImageView) findViewById(R.id.selectedimageview);

    Bundle extras = getIntent().getExtras();
    int imageRes = extras.getInt("IMAGE_RES");

    image.setImageResource(imageRes);

如何将图像从网格视图传递到 android 中的另一个 activity

how to pass the image from grid view to another activity in android

android

gridview

android-intent

android-drawable