Android 如何停止ImageView上的每个动画
我正在创建一个铃声动画(一个图像视图旋转10度,然后-10度)。我正在设置两个RotateAnimations和AnimationListeners,在这两个的onAnimationEnd中,我在ImageView上启动另一个动画。以下是方法: 一旦创建:Android 如何停止ImageView上的每个动画,android,animation,android-animation,Android,Animation,Android Animation,我正在创建一个铃声动画(一个图像视图旋转10度,然后-10度)。我正在设置两个RotateAnimations和AnimationListeners,在这两个的onAnimationEnd中,我在ImageView上启动另一个动画。以下是方法: 一旦创建: final RotateAnimation rotateAnimationLeft = new RotateAnimation(-10, 10, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELA
final RotateAnimation rotateAnimationLeft = new RotateAnimation(-10, 10, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
final RotateAnimation rotateAnimationRight = new RotateAnimation(10, -10, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
rotateAnimationLeft.setDuration(150);
rotateAnimationRight.setDuration(150);
rotateAnimationLeft.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
ivBell.startAnimation(rotateAnimationRight);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
rotateAnimationRight.setAnimationListener(new Animation.AnimationListener() {
@Override
public void onAnimationStart(Animation animation) {
}
@Override
public void onAnimationEnd(Animation animation) {
ivBell.startAnimation(rotateAnimationLeft);
}
@Override
public void onAnimationRepeat(Animation animation) {
}
});
ivBell.startAnimation(rotateAnimationRight);
我设置了一个onTouchListener,希望在其中停止动画
ivBell.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
final int X = (int) event.getRawX();
switch (event.getAction() & MotionEvent.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
ivBell.clearAnimation();
break;
}
}
}
它不起作用。它需要停止什么
(或者,如果这是一个错误的方法,我会很感激一些建议,我应该如何敲响警钟:)谢谢!) 这里的问题是,在清除当前正在运行的动画时,动画结束会触发下一个动画(开始新的循环)。您需要删除动画侦听器(将其设置为null),然后清除动画
if(ivBell.getAnimation() != null) {
ivBell.getAnimation().setAnimationListener(null);
ivBell.clearAnimation();
}
但是在这种情况下,您需要将侦听器存储在一个单独的变量中(以防您想再次使用它)。也许更简单的替代方法是只使用一个布尔标志,该标志可用于确定是否应在动画侦听器中启动“后续”动画
public class Main2Activity extends AppCompatActivity {
boolean shouldAnimateFlag = true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
final ImageView ivBell = findViewById(R.id.ivBell);
final RotateAnimation rotateAnimationLeft = new RotateAnimation(-10, 10, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
final RotateAnimation rotateAnimationRight = new RotateAnimation(10, -10, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
rotateAnimationLeft.setDuration(150);
rotateAnimationRight.setDuration(150);
rotateAnimationLeft.setAnimationListener(new Animation.AnimationListener() {
@Override public void onAnimationStart(Animation animation) { }
@Override
public void onAnimationEnd(Animation animation) {
if(shouldAnimateFlag) {
ivBell.startAnimation(rotateAnimationRight);
}
}
@Override public void onAnimationRepeat(Animation animation) { }
});
rotateAnimationRight.setAnimationListener(new Animation.AnimationListener() {
@Override public void onAnimationStart(Animation animation) { }
@Override
public void onAnimationEnd(Animation animation) {
if (shouldAnimateFlag) {
ivBell.startAnimation(rotateAnimationLeft);
}
}
@Override public void onAnimationRepeat(Animation animation) { }
});
ivBell.startAnimation(rotateAnimationRight);
ivBell.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//The following line will just stop the animation
// shouldAnimateFlag = false;
//You can start/stop using the following lines
if(shouldAnimateFlag) {
shouldAnimateFlag = false;
} else {
shouldAnimateFlag = true;
ivBell.startAnimation(rotateAnimationRight);
}
}
});
}
}