在安卓下拉状态栏的亮度进度条旁加一个自动亮度调节的开关_下拉状态栏新增自动调节亮度开关

<vector xmlns:android="http://schemas.android.com/apk/res/android"
        android:width="24dp"
        android:height="24dp"
        android:viewportWidth="24.0"
        android:viewportHeight="24.0">
    <path
        android:fillColor="#56C0E5"
        android:pathData="M19,3L5,3c-1.11,0 -2,0.9 -2,2v14c0,1.1 0.89,2 2,2h14c1.11,0 2,-0.9 2,-2L21,5c0,-1.1 -0.89,-2 -2,-2zM10,17l-5,-5 1.41,-1.41L10,14.17l7.59,-7.59L19,8l-9,9z"/>
</vector>

<?xml version="1.0" encoding="utf-8"?>
 
    <selector xmlns:android="http://schemas.android.com/apk/res/android">  
      
        <item android:drawable="@drawable/ic_check_box_select" android:state_checked="true"/>  
        <item android:drawable="@drawable/ic_check_box_normal" android:state_checked="false"/>  
      
    </selector> 

接着我们来看一下引用quick_settings_brightness_dialog的地方，frameworks/base/packages/SystemUI/src/com/android/systemui/qs/QSPanel.java文件我们来看一下QSPanel的构造方法

public QSPanel(Context context, AttributeSet attrs) {
        super(context, attrs);
        mContext = context;
 
        setOrientation(VERTICAL);
 
        mBrightnessView = LayoutInflater.from(context).inflate(
                R.layout.quick_settings_brightness_dialog, this, false);
        addView(mBrightnessView);
 
        setupTileLayout();
 
        mFooter = new QSFooter(this, context);
        addView(mFooter.getView());
 
        updateResources();
 
        mBrightnessController = new BrightnessController(getContext(),
                (ImageView) findViewById(R.id.brightness_icon),
                (ToggleSlider) findViewById(R.id.brightness_slider));
 
    }

这里我们可以看到通过LayoutInflater.from方法获取到了亮度进度条的View，然后添加到了QSPanel，QSPanel就是我们下拉状态栏看到的快捷设置面板，接下来我们可以看到创建了一个BrightnessController对象，对象的构造传入了(ImageView)findViewById(R.id.brightness_icon)和(ToggleSlider) findViewById(R.id.brightness_slider)这两个
控件对象，从这个对象的命名其实就可以看出来，亮度控制者，状态栏上亮度调节具体逻辑的实现全部是在这个类里面实现的，OK，我们可以在这里将CheckBox对象也传到这个类里面，代码如下

public QSPanel(Context context, AttributeSet attrs) {
        super(context, attrs);
        ...........
	...........
 
        mBrightnessController = new BrightnessController(getContext(),
                (ImageView) findViewById(R.id.brightness_icon),
                (ToggleSlider) findViewById(R.id.brightness_slider));
 
	mBrightnessController.setCheckBox((CheckBox)findViewById(R.id.brightness_check));
 
    }

上述步骤完成后，我们就可以在BrightnessController这个类里面来具体实现自动亮度控制的逻辑

import static android.provider.Settings.System.SCREEN_BRIGHTNESS_MODE;
import static android.provider.Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC;
import static android.provider.Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL;
 
  public void setCheckBox(CheckBox checkBox){
                  mCheckBox = checkBox;
        
        mCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
			
			@Override
			public void onCheckedChanged(CompoundButton arg0, boolean arg1) {
				// TODO Auto-generated method stub
				if (arg1) {
					Settings.System.putInt(mContext.getContentResolver(), SCREEN_BRIGHTNESS_MODE,
							SCREEN_BRIGHTNESS_MODE_AUTOMATIC);
				} else {
					Settings.System.putInt(mContext.getContentResolver(), SCREEN_BRIGHTNESS_MODE,
							SCREEN_BRIGHTNESS_MODE_MANUAL);
				}
				Intent intent = new Intent();
				intent.setAction("com.android.autobrightness");
				mContext.sendBroadcast(intent);
			}
		});
    }

通过改变SCREEN_BRIGHTNESS_MODE的值，便可以控制打开关闭自动亮度调节，此方法是我从Settings代码中找到的，亲试有效，这里发送了个广播是为了刷新设置的自动调节亮度界面显示问题，不用深究，这里还有一个问题，就是自动亮度调节的默认，或者在设置中改变了自动亮度调节按钮，怎么来刷新我们的CheckBox的显示，很好解决，BrightnessController这个类里面其实已经有了这个方法，叫做updateIcon方法，我们在这个类里可以直接设置CheckBox的显示

private void updateIcon(boolean automatic) {
        if (mIcon != null) {
            mIcon.setImageResource(automatic && SHOW_AUTOMATIC_ICON ?
                    com.android.systemui.R.drawable.ic_qs_brightness_auto_on :
                    com.android.systemui.R.drawable.ic_qs_brightness_auto_off);
        }
        
        if (mCheckBox != null) {
			mCheckBox.setChecked(automatic);
		}
    }

这里还有最后一个要解决的问题，点击设置-显示-亮度，这里会弹出一个亮度控制条dialog，这个dialog其实也是quick_settings_brightness_dialog，所以我们需要把这个dialog中的CheckBox也传给BrightnessController，具体实现如下

  @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
 
        ...........
 
        final ImageView icon = (ImageView) findViewById(R.id.brightness_icon);
        final ToggleSlider slider = (ToggleSlider) findViewById(R.id.brightness_slider);
        mBrightnessController = new BrightnessController(this, icon, slider);
	CheckBox checkBox = (CheckBox) findViewById(R.id.brightness_check);
        mBrightnessController.setCheckBox(checkBox);
    }

OK,以上就是在状态栏添加自动亮度调节开关的全部过程，按照如上方法，就可以实现全部功能，可能需要注意的就是layout布局的调节，这方面需要大家自己来调整，大家看了文章，觉得不错就点个赞吧