安卓app开发项目-TestBrightness2(源码).zip

package cn.lkp; import android.app.Activity; import android.os.Bundle; import android.os.Vibrator; import android.util.Log; import android.view.GestureDetector; import android.view.MotionEvent; import android.view.WindowManager; import android.widget.MediaController; import android.widget.VideoView; public class MainActivity extends Activity { private VideoView myVideoView; private String path = "/mnt/sdcard/video/1_baofeng.3gp"; private String TAG = "MainActivity"; private GestureDetector mGestureDetector; private Vibrator vibrator; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); myVideoView = (VideoView) findViewById(R.id.myvideoview); myVideoView.setVideoPath(path); myVideoView.setMediaController(new MediaController(this)); myVideoView.requestFocus(); myVideoView.start(); } /* * * 设置屏幕亮度 lp = 0 全暗 ，lp= -1,根据系统设置， lp = 1; 最亮 */ public void setBrightness(float brightness) { WindowManager.LayoutParams lp = getWindow().getAttributes(); // if (lp.screenBrightness <= 0.1) { // return; // } lp.screenBrightness = lp.screenBrightness + brightness / 255.0f; if (lp.screenBrightness > 1) { lp.screenBrightness = 1; vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE); long[] pattern = { 10, 200 }; // OFF/ON/OFF/ON... vibrator.vibrate(pattern, -1); } else if (lp.screenBrightness < 0.2) { lp.screenBrightness = (float) 0.2; vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE); long[] pattern = { 10, 200 }; // OFF/ON/OFF/ON... vibrator.vibrate(pattern, -1); } Log.e(TAG, "lp.screenBrightness= " + lp.screenBrightness); getWindow().setAttributes(lp); } @Override protected void onResume() { mGestureDetector = new GestureDetector( new GestureDetector.OnGestureListener() { public boolean onSingleTapUp(MotionEvent e) { return false; } public boolean onDown(MotionEvent e) { return false; } public void onLongPress(MotionEvent e) { } public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { return true; } public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) { final double FLING_MIN_DISTANCE = 0.5; final double FLING_MIN_VELOCITY = 0.5; if (e1.getY() - e2.getY() > FLING_MIN_DISTANCE && Math.abs(distanceY) > FLING_MIN_VELOCITY) { Log.e(TAG, "up"); setBrightness(20); } if (e1.getY() - e2.getY() < FLING_MIN_DISTANCE && Math.abs(distanceY) > FLING_MIN_VELOCITY) { Log.e(TAG, "down"); setBrightness(-20); } return true; } public void onShowPress(MotionEvent e) { // TODO Auto-generated method stub } }); super.onResume(); } public boolean onTouchEvent(MotionEvent event) { boolean result = mGestureDetector.onTouchEvent(event); if (!result) { if (event.getAction() == MotionEvent.ACTION_UP) { // getVideoInfosfromPath(filePath); } result = super.onTouchEvent(event); } return result; } @Override protected void onStop() { if (null != vibrator) { vibrator.cancel(); } super.onStop(); } }