3 4 5 import com.dh.shoudiantong.screendatils.VerticalSeekBar; 6 7 import android.app.Activity; 8 import android.content.Context; 9 import android.os.Bundle; 10 import android.view.MotionEvent; 11 import android.view.Window; 12 import android.view.WindowManager; 13 import android.widget.RelativeLayout; 14 import android.widget.SeekBar; 15 import android.widget.SeekBar.OnSeekBarChangeListener; 16 17 18 19 public class ScreenActivity extends Activity{ 20 21 private RelativeLayout mylayout;//布局 22 Context context; 23 private int Max_Brightness = 255;//进度条的最大值 24 private VerticalSeekBar vSeekBar = null;//调节亮度的进度条 25 private float fBrightness = 0.0f;//亮度值 26 private WindowManager.LayoutParams lp = null;//窗口处理器的参数类 27 @Override 28 protected void onCreate(Bundle savedInstanceState) { 29 // TODO Auto-generated method stub 30 super.onCreate(savedInstanceState); 31 HideStatusBase(); 32 setContentView(R.layout.screen_activity); 33 mylayout=(RelativeLayout)findViewById(R.id.mylayout); 34 35 vSeekBar = (VerticalSeekBar) findViewById(R.id.verticalSeekBar); 36 vSeekBar.setMax(Max_Brightness); 37 vSeekBar.setProgress(Max_Brightness);//默认进度值为最大 38 39 vSeekBar.setOnSeekBarChangeListener(new SeekBarChangedListener()); 40 //默认屏幕为最大亮度 41 lp = getWindow().getAttributes(); 42 fBrightness = (float) vSeekBar.getProgress() / (float)Max_Brightness; 43 lp.screenBrightness =fBrightness; 44 getWindow().setAttributes(lp);
45 lp.flags |= WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON; 46 47 } 48 class SeekBarChangedListener implements OnSeekBarChangeListener{ 49 @Override 50 public void onProgressChanged(SeekBar seekBar, int progress, 51 boolean fromUser) { 52 // TODO Auto-generated method stub 53 if(progress<1) progress=1;//此处是为了避免screenbrightness=0，从而导致屏幕自动休眠锁屏 54 fBrightness = (float) progress/ (float)Max_Brightness; 55 lp.screenBrightness =fBrightness; 56 getWindow().setAttributes(lp); 57 } 58 59 @Override 60 public void onStartTrackingTouch(SeekBar seekBar) { 61 // TODO Auto-generated method stub 62 63 } 64 65 @Override 66 public void onStopTrackingTouch(SeekBar seekBar) { 67 // TODO Auto-generated method stub 68 69 } 70 71 } 72 /** 73 * 屏幕点击事件显示菜单 74 */ 75 @Override 76 public boolean onTouchEvent(MotionEvent event){ 77 78 return false; 79 } 80 /** 81 * 全屏设置 82 */ 83 private void HideStatusBase() 84 { 85 requestWindowFeature(Window.FEATURE_NO_TITLE); 86 int flag=WindowManager.LayoutParams.FLAG_FULLSCREEN; 87 Window myWindow=this.getWindow(); 88 myWindow.setFlags(flag,flag); 89 } 90 91 } 92 93
效果图：
lp.flags |= WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
是为了避免屏幕进入休眠状态
注意：当SeekBrightness=0时，屏幕会自动休眠锁屏；为了解决这个问题，我将progress小于1时设为1；
以上仅为本人为了记录，方便以后查略；若有错误，请不吝指正。