Android 旋转内部有动画的对话框时出现问题
我使用下面的类来创建一个可旋转的对话框,一切正常Android 旋转内部有动画的对话框时出现问题,android,animation,rotation,android-alertdialog,Android,Animation,Rotation,Android Alertdialog,我使用下面的类来创建一个可旋转的对话框,一切正常 import android.content.Context; import android.graphics.Canvas; import android.graphics.Matrix; import android.util.AttributeSet; import android.view.MotionEvent; import android.widget.LinearLayout; public class RotateLinea
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.LinearLayout;
public class RotateLinearLayout extends LinearLayout {
private Matrix mForward = new Matrix();
private Matrix mReverse = new Matrix();
private float[] mTemp = new float[2];
private float degree = 0;
public RotateLinearLayout(Context context) {
super(context);
}
public RotateLinearLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void dispatchDraw(Canvas canvas) {
if (degree == 0) {
super.dispatchDraw(canvas);
return;
}
canvas.rotate(degree, getWidth() / 2, getHeight() / 2);
mForward = canvas.getMatrix();
mForward.invert(mReverse);
canvas.save();
canvas.setMatrix(mForward); // This is the matrix we need to use for
// proper positioning of touch events
super.dispatchDraw(canvas);
canvas.restore();
}
@Override
public boolean dispatchTouchEvent(MotionEvent event) {
if (degree == 0) {
return super.dispatchTouchEvent(event);
}
final float[] temp = mTemp;
temp[0] = event.getX();
temp[1] = event.getY();
mReverse.mapPoints(temp);
event.setLocation(temp[0], temp[1]);
return super.dispatchTouchEvent(event);
}
public void rotate() {
if (degree == 0) {
degree = 180;
} else {
degree = 0;
}
}
}
我在这个对话框的左侧有一个ImageView,它配备了一个动画。对话框未旋转时,ImageView将正确设置动画。当我旋转对话框时,ImageView必须在对话框右侧设置动画,但它会将先前放置的ImageView的屏幕像素更改为丑陋状态。我的意思是,旋转后,ImageView的位置会正确更改,但其动画的位置保持不变
如何设置ImageView动画的新位置?我刚刚添加了一行
invalidate()代码>所有内容都已更正:
@Override
protected void dispatchDraw(Canvas canvas) {
if (degree == 0) {
super.dispatchDraw(canvas);
return;
}
canvas.rotate(degree, getWidth() / 2, getHeight() / 2);
mForward = canvas.getMatrix();
mForward.invert(mReverse);
canvas.save();
canvas.setMatrix(mForward); // This is the matrix we need to use for
// proper positioning of touch events
super.dispatchDraw(canvas);
canvas.restore();
// is needed
invalidate();
}