android 设置系统屏幕亮度

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<span style="white-space:pre"></span>/** * 获得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 int getScreenMode(){    int screenMode=0;    try{    screenMode = Settings.System.getInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS_MODE);    }    catch (Exception localException){        }    return screenMode;  }   /** * 获得当前屏幕亮度值  0--255 */  private int getScreenBrightness(){    int screenBrightness=255;    try{    screenBrightness = Settings.System.getInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS);    }    catch (Exception localException){          }    return screenBrightness;  }/** * 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 saveScreenBrightness(int paramInt){    try{      Settings.System.putInt(getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, paramInt);    }    catch (Exception localException){      localException.printStackTrace();    }  }  /**   * 保存当前的屏幕亮度值，并使之生效   */  private void setScreenBrightness(int paramInt){    Window localWindow = getWindow();    WindowManager.LayoutParams localLayoutParams = localWindow.getAttributes();    float f = paramInt / 255.0F;    localLayoutParams.screenBrightness = f;    localWindow.setAttributes(localLayoutParams);  }
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