如何裁剪截图？

Question

您好我有一个代码来截取屏幕截图然后分享它的工作非常好但我想从顶部和底部裁剪这个截图。我希望能帮助我，因为我是编码新手。这是我使用它的代码：

share.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Bitmap bitmap = takeScreenshot();
        saveBitmap(bitmap);
        shareIt();
    }


    public Bitmap takeScreenshot() {
        View rootView = findViewById(android.R.id.content).getRootView();
        rootView.setDrawingCacheEnabled(true);
        return rootView.getDrawingCache();
    }

    private void saveBitmap(Bitmap bitmap) {
        imagePath = new File(Environment.getExternalStorageDirectory() + "/screenshot.png"); ////File imagePath
        FileOutputStream fos;
        try {
            fos = new FileOutputStream(imagePath);
            bitmap.compress(Bitmap.CompressFormat.PNG, 100, fos);
            fos.flush();
            fos.close();
        } catch (FileNotFoundException e) {
            Log.e("GREC", e.getMessage(), e);
        } catch (IOException e) {
            Log.e("GREC", e.getMessage(), e);
        }
    }

    private void shareIt() {
        Uri myUri = Uri.fromFile(imagePath);
        Intent sharingIntent = new Intent(Intent.ACTION_SEND);
        sharingIntent.setType("image/*");
        sharingIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        sharingIntent.putExtra(Intent.EXTRA_STREAM, myUri);
        startActivity(Intent.createChooser(sharingIntent, "Share via"));
    }
});


    displayResults();

}

Answer 1

如果你想使用一个库，你可以实现这个library。并遵循此代码

来自ArthurHub / Android-Image-Cropper

AndroidManifest.xml中

<activity android:name="com.theartofdev.edmodo.cropper.CropImageActivity"
android:theme="@style/Base.Theme.AppCompat"/> <!-- optional (needed if default theme has no action bar) -->

要启动CropImageActivity

// start picker to get image for cropping and then use the image in cropping 
activity
CropImage.activity()
         .setGuidelines(CropImageView.Guidelines.ON)
         .start(this);

// start cropping activity for pre-acquired image saved on the device
CropImage.activity(imageUri)
         .start(this);

// for fragment (DO NOT use `getActivity()`)
CropImage.activity()
         .start(getContext(), this);

覆盖onActivityResult

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE) {
        CropImage.ActivityResult result = CropImage.getActivityResult(data);
        if (resultCode == RESULT_OK) {
           Uri resultUri = result.getUri();
        } else if (resultCode == CropImage.CROP_IMAGE_ACTIVITY_RESULT_ERROR_CODE) {
          Exception error = result.getError();
        }
      }
    }