Question

我想在右侧滑动旋转瓶子。它在 棒棒糖 中运行良好，但在 marshmallow 中运行不顺畅。图像的大小为100 * 100.

请让我知道错误，我该如何解决。

以下是我的代码：

            GestureDetector.OnGestureListener listener = new GestureDetector.SimpleOnGestureListener() {
                @Override
                public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {

                    // clearAnimation();
                    int sanctity = 50;
                    //
                    Speed = Math.round(velocityX / 1000);
                    if ((e2.getX() - e1.getX()) > sanctity) {
                        swipeLayout.setVisibility(View.GONE);
                        scroller.fling(0, 0, (int) Math.hypot(velocityX, velocityY), 0, 0, Integer.MAX_VALUE, 0, 0);
                        invalidate();


                    }


                    return true;
                }
            };


            @Override
            public void computeScroll() {
                if (scroller.computeScrollOffset()) {
                    firstime = false;
                    float current = scroller.getCurrX();
                    Log.d("computeScroll ", String.valueOf(current));

                    setRotation(current * FACTOR);

                    invalidate();




                        }

                    }

Answer 1

public class MainActivity extends Activity{
    Button buttonClick;
    ImageView img;
    Bitmap source;
    float angle=0;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main); 
       img= (ImageView) findViewById(R.id.imgView);
       // Create Bitmap object for the source image
       source=BitmapFactory.decodeFile(Environment.getExternalStorageDirectory()+"/Rose.jpg");

       img.setImageBitmap(source);
       buttonClick = (Button) findViewById(R.id.bt);
       buttonClick.setOnClickListener(new OnClickListener(){
          public void onClick(View view){
              angle+=90;
              Bitmap rotatedImage=rotateImage(source,angle);
              img.setImageBitmap(rotatedImage);
          }
       });


    }

    public static Bitmap rotateImage(Bitmap sourceImage, float angle)
    {
        Matrix matrix = new Matrix();
        matrix.postRotate(angle);
        return Bitmap.createBitmap(sourceImage, 0, 0, sourceImage.getWidth(), sourceImage.getHeight(), matrix, true);
    }

}

现在你只需创建一个图像视图和按钮来触发旋转事件。这在两个版本中都很好用

图像旋转在棒棒糖中起作用，但在棉花糖中起作用

1 个答案: