Android中调节Activity变亮变暗（屏幕亮度）

import android.os.Bundle;import android.animation.ValueAnimator;import android.animation.ValueAnimator.AnimatorUpdateListener;import android.annotation.SuppressLint;import android.app.Activity;import android.view.Menu;import android.view.View;import android.view.Window;import android.view.WindowManager;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}public void click(View view){switch (view.getId()) {case R.id.button1:dimBackground(1.0f,0.0f);break;case R.id.button2:dimBackground(0.5f,1.0f);break;default:break;}}@SuppressLint("NewApi")private void dimBackground(final float from, final float to) {    final Window window = getWindow();    ValueAnimator valueAnimator = ValueAnimator.ofFloat(from, to);    valueAnimator.setDuration(500);    valueAnimator.addUpdateListener(new AnimatorUpdateListener() {        @Override        public void onAnimationUpdate(ValueAnimator animation) {            WindowManager.LayoutParams params = window.getAttributes();            params.alpha = (Float) animation.getAnimatedValue();            window.setAttributes(params);        }    });    valueAnimator.start();}}

更多相关文章

随机推荐