Android 设置屏幕亮度

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setScreenMode(Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL); // 手动调节屏幕亮度

final String[] bgLight = new String[] {"暗","稍暗","标准","稍亮","亮"};                    Dialog alertDialog3 = new AlertDialog.Builder(MainActivity.this)            .setTitle("调整屏幕亮度")            .setSingleChoiceItems(bgLight, 0, new DialogInterface.OnClickListener() {                     @Override                public void onClick(DialogInterface dialog, int which) {                selectedBrightness = which;                    }                }).                setPositiveButton("确认", new DialogInterface.OnClickListener() {                    @Override                    public void onClick(DialogInterface dialog, int which) {                                        int brightness = 0;                                            switch(selectedBrightness)                     {                         case 0:brightness = 10; break;                         case 1:brightness = 40; break;                         case 2:brightness = 75; break;                        case 3:brightness = 110; break;                         case 4:brightness = 140; break;                         default:brightness = 75;                      }                         setScreenBrightness(brightness);                        saveScreenBrightness(brightness);                    }                 }).               setNegativeButton("取消", new DialogInterface.OnClickListener() {                @Override                public void onClick(DialogInterface dialog, int which) {                    // TODO Auto-generated method stub                    }                }).               create();           alertDialog3.show();

/** * 设置当前屏幕亮度的模式     * SCREEN_BRIGHTNESS_MODE_AUTOMATIC=1 为自动调节屏幕亮度 * SCREEN_BRIGHTNESS_MODE_MANUAL=0  为手动调节屏幕亮度 */  private void setScreenMode(int paramInt){    try{      Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE, paramInt);    }catch (Exception localException){      localException.printStackTrace();    }  }  /**   * 设置当前屏幕亮度值  0--255   */   private void setScreenBrightness(int paramInt){       //Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, paramInt);    //paramInt = Settings.System.getInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, -1);    WindowManager.LayoutParams localLayoutParams =  getWindow().getAttributes();    float f = paramInt / 255.0F;    localLayoutParams.screenBrightness = f;    getWindow().setAttributes(localLayoutParams);      }   /**   * 保存当前屏幕亮度值  0--255   */   private void saveScreenBrightness(int paramInt){          try{            Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, paramInt);          }          catch (Exception localException){            localException.printStackTrace();          }     }

参考链接：

http://daikainan.iteye.com/blog/1455323