使用RippleDrawable和模拟屏幕点击实现下雨时水波纹效果。
布局文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_drawable"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="amorypepelu.github.io.drawabledemo.DrawableActivity">
<Button
android:id="@+id/RippleDrawableBtn"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/ripple"
android:text="" />
</LinearLayout>
Drawable：
<?xml version="1.0" encoding="utf-8"?>
<ripple xmlns:android="http://schemas.android.com/apk/res/android"
android:color="@android:color/holo_purple"></ripple>
java代码：
private int width;
private int height;
private Random random;
random = new Random();
width = getResources().getDisplayMetrics().widthPixels;
height = getResources().getDisplayMetrics().heightPixels;
Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
int x = (int) random.nextLong() % width;
int y = (int) random.nextLong() % height;
clickEvent(x, y);
sendEmptyMessageDelayed(0, 600);
}
};
handler.sendEmptyMessage(0);
handler.sendEmptyMessageDelayed(0,200);
handler.sendEmptyMessageDelayed(0,400);
模拟点击事件：
private void clickEvent(int x, int y) {
long downTime = SystemClock.uptimeMillis();
MotionEvent downEvent = MotionEvent.obtain(downTime, downTime,
MotionEvent.ACTION_DOWN, x, y, 0);
MotionEvent upEvent = MotionEvent.obtain(downTime, downTime,
MotionEvent.ACTION_UP, x, y, 0);
mRippleDrawableBtn.onTouchEvent(downEvent);
mRippleDrawableBtn.onTouchEvent(upEvent);
downEvent.recycle();
upEvent.recycle();
}
参考：
