Android8.0在Setting中添加Led指示灯闪烁开关

1.frameworks/base/core/java/android/provider/Settings.java中添加

/**
 *Control whether to enable led indicator mod.
 *@hide
 */
public static final String LED_INDICATOR_MODE=”led_indicator_mode”;
/**
 *LED_INDICATOR_MODE value for off mode.
 *@hide
 */
public static final int LED_INDICATOR_MODE=0;
/**
 *LED_INDICATOR_MODE value for on mode.
 *@hide
 */
public static final int LED_INDICATOR_MODE=1;

2.frameworks/base/packages/SettingsProvider/res/values/defaults.xml中添加

1

3.frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java中添加使led指示的键和键值存入数据库的操作

loadintegerSettings(stmt,Settings.System.LED_INDICATOR_MODE,
		R.integer.def_led_indicator_mode);

4.packages/apps/Settings/res/values/string.xml中添加

Led indicator

5.packages/apps/Settings/res/xml/display_settings.xml中添加

6.在packages/apps/Settings/src/com/android/settings/display/中添加一个新文件LedIndicatorPreferenceController.java

package com.android.settings.display;

import android.content.Context;
import android.provider.Settings;
import android.support.v7.preference.Preference;
import android.support..v14.preference.SwitchPreference;

import com.android.settings.core.PreferenceController;

import static android.provider.Settings.System.LED_INDICATOR_MODE;
import static android.provider.Settings.System.LED_INDICAATOR_MODE_OFF;
import static android.provider.Settings.System.LED_INDICAATOR_MODE_ON;

/**
 * Created by songyan on 2017/12/28.
 */

public class LedIndecatorPreferenceController extends PreferenceController implements
        Preference.OnPreferenceChangeListener{

    private static final String KEY_LED_INDICATOR="led_indicator";

    public LedIndecatorPreferenceController(Context context){
        super(context);
    }

    @Override
    public String getPreferenceKey(){
        return KEY_LED_INDICATOR;
    }

    @Override
    public void updateState(Preference preference){
        int ledMode=Settings.System.getInt(mContext.getContentResolver(),
                LED_INDICATOR_MODE,LED_INDICATOR_MODE_ON);
        ((SwitchPreference)preference).setChecked(ledMode==LED_INDICATOR_MODE_ON);
    }

    @Override
    public boolean isAvailable(){
        return true;
    }

    @Override
    public boolean onPreferenceChange(Preference preference,Object newValue){
        boolean isOn=(Boolean)newValue;
        Settings.System.putInt(mContext.getContentResolver(),LED_INDICATOR_MODE,
                isOn ? LED_INDICATOR_MODE_ON : LED_INDICATOR_MODE_OFF);
        return true;
    }

}

7.packages/apps/Settings/src/com/android/settings/DisplaySettings.java中添加

import com.android.settings.display.LedIndicatorPreferenceController;

private static final String KEY_LED_INDICATOR=”led_indicator”;  

   在buildPreferenceController方法中添加

controllers.add(new LedIndicatorPreferenceController(context));

8.frameworks/base/services/core/java/com/android/server/notification/NotificationManagerService.java中添加

import static android.provider.Settings.System.LED_INDICATOR_MODE;
import static android.provider.Settings.System.LED_INDICATOR_MODE_OFF;
import static android.provider.Settings.System.LED_INDICATOR_MODE_ON

   在updateLightsLocked()方法中添加

int ledMode=Settings.System.getInt(getContext().getContentResolver(),
        	LED_INDICATOR_MODE,LED_INDICATOR_MODE_ON);
if(ledNotification==null || mInCall || mScreenOn || ledMode==LED_INDICATOR_MODE_OFF){