RK Android7.1 进入Camera2 亮度会增加

 

一.现象

Android7.1  进Camera2 背光亮度会增加到 brightness 229 ，退出之后Camera2 亮度会回到默认值，不正常退出Camera2 （不完成生命周期）则会保存到 brightness 229

adb shell settings get system screen_brightness

 二.RK OS 

ZK_RXXX_RK3399_ANDROID7.1\packages\apps\Camera2\src\com\android\camera\CameraActivity.java

       setScreenBrightAdjust  设置背光值

                     mScreenBrightAdjust

　　　　　　　　     restoreScreenBright　　

    private void setMaxScreenBright() {
        Window win = getWindow();
        WindowManager.LayoutParams winParams = win.getAttributes();
        Log.i(TAG, "screenBrightness = " + winParams.screenBrightness);
        winParams.screenBrightness = WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_FULL;
        win.setAttributes(winParams);
    }

    private int mOrignalScreenBrightMode = -1;
    private int mOrignalScreenBrightness = -1;
    private void setScreenBrightAdjust() {
        mOrignalScreenBrightMode = getScreenMode();
        mOrignalScreenBrightness = getScreenBrightness();
        Log.i(TAG, "mOrignalScreenBrightMode = " + mOrignalScreenBrightMode
                + ",mOrignalScreenBrightness = " + mOrignalScreenBrightness);
        if (mOrignalScreenBrightMode == Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC)
            setScreenMode(Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);
        if (mOrignalScreenBrightness < ((int) (255 * 0.9f)))
            saveScreenBrightness((int) (255 * 0.9f));
    }

    private Runnable mScreenBrightAdjust = new Runnable() {
        
        @Override
        public void run() {
            // TODO Auto-generated method stub
            setScreenBrightAdjust();
        }
    };

    private void restoreScreenBright() {
        mMainHandler.removeCallbacks(mScreenBrightAdjust);
        setScreenMode(mOrignalScreenBrightMode);
        saveScreenBrightness(mOrignalScreenBrightness);
    }

    /** 
     * getCurrentScreenBrightMode
     * SCREEN_BRIGHTNESS_MODE_AUTOMATIC=1 auto
     * SCREEN_BRIGHTNESS_MODE_MANUAL=0  manual
     */  
    private int getScreenMode() {
        int screenMode=0;
        try {
            screenMode = Settings.System.getInt(getContentResolver(),
                    Settings.System.SCREEN_BRIGHTNESS_MODE);
        }
        catch (Exception localException){
            Log.e(TAG, "getScreenMode error:" + localException);
        }
        return screenMode;  
    }  

    /** 
     * getScreenBrightness  0--255
     */  
    private int getScreenBrightness() {
        int screenBrightness = 255;
        try {
            screenBrightness = Settings.System.getInt(getContentResolver(),
                    Settings.System.SCREEN_BRIGHTNESS);
        }
        catch (Exception localException){
            Log.e(TAG, "getScreenBrightness error:" + localException);
        }
        return screenBrightness;  
    }

    /** 
     * setScreenMode
     * SCREEN_BRIGHTNESS_MODE_AUTOMATIC=1 auto 
     * SCREEN_BRIGHTNESS_MODE_MANUAL=0  manual 
     */
    private void setScreenMode(int paramInt){
        if (paramInt < 0) return;
        try{  
            Settings.System.putInt(getContentResolver(),
                    Settings.System.SCREEN_BRIGHTNESS_MODE, paramInt);
        }catch (Exception localException){
            Log.e(TAG, "setScreenMode error:" + localException);
        }
    }

    /** 
     * saveScreenBrightness  0--255
     */  
    private void saveScreenBrightness(int paramInt){
        if (paramInt < 0) return;
        try{  
            Settings.System.putInt(getContentResolver(),
                    Settings.System.SCREEN_BRIGHTNESS, paramInt);
        }
        catch (Exception localException) {
            Log.e(TAG, "saveScreenBrightness error:" + localException);
        }
    }

　把setScreenBrightAdjust  干掉就差不多了………