根据机器人周围光线亮度变化 [英] Change brightness according to surrounding light in android

问题描述

我要根据光线。要改变屏幕亮度

I want to change brightness of screen according to light..

我找到的链接获取亮度和设置亮度。

I found links for getting brightness level and setting up brightness..

<一个href="http://stackoverflow.com/questions/13212835/change-screen-brightness-onpause-android-app">Change屏幕亮度的onPause（Android应用程序）

<一个href="http://stackoverflow.com/questions/9339430/how-to-toggle-auto-brightness-on-and-off-not-a-repeat">How切换自动亮度和关闭？ （不重复）

<一个href="http://stackoverflow.com/questions/3737579/changing-screen-brightness-programmatically-in-android">changing屏幕亮度以编程方式在android的

<一个href="http://stackoverflow.com/questions/7646865/changing-screen-brightness-programmatically-as-with-the-power-widget">Changing屏幕亮度编程（与电源部件）

不过，我想改变亮度的根据周围的光线 .. 总之，我想做的事情一样自动亮度工程..

But I want to change brightness as per surrounding light.. In short, I want to do same as auto brightness works..

我如何检测周围光线的？或者我可以触发自动亮度功能??

How Can I detect surrounding light?? OR Can I trigger auto brightness functionality??

亮度是有值的范围从0到255。 我想设置亮度级别，根据周围的光照强度不能为0到255我怎样才能得到这两者之间的比值。

brightness is having value range between 0 to 255. I want to set brightness level according to surrounding light level which can not be 0 to 255. How can I get ratio between this two.

帮助是必要的。谢谢

推荐答案

这是我自己的解决方案：

Solution from myself:

我实现了从<用颤抖的监听器href="http://www.palmmedia.de/Blog/2010/10/28/android-yahtzee-application-with-shake-detection">here. 我用aboce链接也让它完成。

I implemented shaking listener from here. I used aboce links also to make it completed.

我在 ShakeBrightService.java

public class ShakeBrightService extends Service {

private ShakeDetector shakeBrightDetector = new ShakeDetector();

@Override
public void onCreate() {
    super.onCreate();

}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {

    shakeBrightDetector.stop();
    shakeBrightDetector.start(this, shakeBrightEventListener);

    return super.onStartCommand(intent, flags, startId);
}

private ShakeEventListener shakeBrightEventListener = new ShakeEventListener() {

    @Override
    public void onShake() {
        setAutoBrightness(true);
    }
};

@Override
public IBinder onBind(Intent intent) {
    return null;
}

private void setAutoBrightness(boolean value) {

    Toast.makeText(getApplicationContext(), "AutoBrightness : " + value,
            Toast.LENGTH_SHORT).show();

    if (value) {

        Settings.System.putInt(getContentResolver(),
                Settings.System.SCREEN_BRIGHTNESS_MODE,
                Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC);
    } else {

        Settings.System.putInt(getContentResolver(),
                Settings.System.SCREEN_BRIGHTNESS_MODE,
                Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL);
    }

    Intent i = new Intent(getApplicationContext(), MainActivity1.class);
    i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(i);   
}

}

假的令人耳目一新的观点
MainActivity1.java

Fake for refreshing view
MainActivity1.java

public class MainActivity1 extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setContentView(R.layout.activity_main1);

    refreshBrightness(getBrightnessLevel());

    Thread t = new Thread() {
        public void run() {
            try {
                sleep(10);
            } catch (InterruptedException e) {
            }
            finish();
        }
    };
    t.start();
}

private void refreshBrightness(float brightness) {

    WindowManager.LayoutParams lp = getWindow().getAttributes();
    if (brightness < 0) {
        lp.screenBrightness = WindowManager.LayoutParams.BRIGHTNESS_OVERRIDE_NONE;
    } else {
        lp.screenBrightness = brightness;
    }
    getWindow().setAttributes(lp);
}

int getBrightnessLevel() {
    try {
        int value = Settings.System.getInt(getContentResolver(),
                Settings.System.SCREEN_BRIGHTNESS);
        // convert brightness level to range 0..1
        value = value / 255;
        return value;
    } catch (SettingNotFoundException e) {
        return 0;
    }
}

FakeActivity是有主题安卓主题=@安卓风格/ Theme.Translucent.NoTitleBar，于是默默亮度改变

FakeActivity is having theme android:theme="@android:style/Theme.Translucent.NoTitleBar", so silently brightness is changed.

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