AppRunningInBackground.java

package com.jumige.android.ui.template.appRunning;

import android.app.ActivityManager;
import android.app.ActivityManager.RunningAppProcessInfo;
import android.app.ActivityManager.RunningTaskInfo;
import android.app.KeyguardManager;
import android.content.ComponentName;
import android.content.Context;


import java.util.List;

/**
 * 可判断是否在前后台运行
 */
public class AppRunningInBackground {

    public static boolean notifyShowing = false;
    public static boolean isSpecialSystem = false;
    private boolean isInstance = false;
    ActivityManager activityManager;
    KeyguardManager keyguardManager;
    private Context context = null;
    private static AppRunningInBackground appRunningInBackground = null;

    public static AppRunningInBackground getInstance(Context context) {
        if (appRunningInBackground == null) {
            synchronized (AppRunningInBackground.class) {
                if (appRunningInBackground == null) {
                    appRunningInBackground = new AppRunningInBackground(context.getApplicationContext());
                }

            }
        }
        return appRunningInBackground;
    }

    public AppRunningInBackground(Context context) {
        this.context = context;
    }

    public void onCreate() {
        if (!isInstance) {
            activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
            keyguardManager = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);
            isInstance = true;
        }

    }

    public void onStart() {
        if (notifyShowing && appRunningInBackground != null) {
            notifyShowing = false;
            appRunInForeground();
        }
    }

    public void onStop() {
        if (appRunningInBackground != null && !isAppOnForeground()) {
            notifyShowing = true;
            appRunInBackground();
        }
    }

    /**
     * 后台运行的操作
     */
    public void appRunInBackground() {
//        Intent  startIntent = new Intent(AppGlobalConfig.STOPACTIVITY);
//		  context.sendBroadcast(startIntent);

    }

    public void appRunInForeground() {


    }


    /**
     * 判断程序是否在前台
     *
     * @return true 在前台; false 在后台
     */
    private boolean isAppOnForeground() {
        if (!isSpecialSystem) {
            boolean isspecial = true;
            String packageName = context.getPackageName();
            List<RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses();
            if (appProcesses == null)
                return false;
            for (RunningAppProcessInfo appProcess : appProcesses) {
                if (appProcess.processName.equals(packageName)) {
                    if (appProcess.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND || appProcess.importance == RunningAppProcessInfo.IMPORTANCE_VISIBLE) {
                        return true;
                    }
                    if (keyguardManager.inKeyguardRestrictedInputMode()) return true;
                }
                if (isspecial) {
                    if (appProcess.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
                        isspecial = false;
                    }
                }
            }
            if (isspecial) {
                isSpecialSystem = true;
                return !isApplicationBroughtToBackgroundByTask();
            }
            return false;
        } else {
            return !isApplicationBroughtToBackgroundByTask();
        }
    }

    /**
     * 判断当前应用程序是否处于后台，通过getRunningTasks的方式
     *
     * @return true 在后台; false 在前台
     */
    public boolean isApplicationBroughtToBackgroundByTask() {
        List<RunningTaskInfo> tasks = activityManager.getRunningTasks(1);
        if (!tasks.isEmpty()) {
            ComponentName topActivity = tasks.get(0).topActivity;
            if (!topActivity.getPackageName().equals(context.getPackageName())) {
                return true;
            }
        }
        return false;
    }
}