/**
* 自动根据参数选择判断前后台的方法
*
* @param context 上下文参数
* @return
*/
public static boolean isForeground(Context context) {
boolean runningTask = getRunningTask(context, context.getPackageName());
boolean runningAppProcesses = getRunningAppProcesses(context, context.getPackageName());
return runningTask && runningAppProcesses;
}
/**
* 方法1:通过getRunningTasks判断App是否位于前台,此方法在5.0以上失效
*
* @param context 上下文参数
* @param packageName 需要检查是否位于栈顶的App的包名
* @return
*/
public static boolean getRunningTask(Context context, String packageName) {
try{
ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningTaskInfo> runningTasks = am.getRunningTasks(1);
if (runningTasks != null && runningTasks.size() > 0) {
ComponentName cn = runningTasks.get(0).topActivity;
return !TextUtils.isEmpty(packageName) && packageName.equals(cn.getPackageName());
}
}catch (Exception e){
e.printStackTrace();
}
return false;
}
/**
* 方法2:通过getRunningAppProcesses的IMPORTANCE_FOREGROUND属性判断是否位于前台,当service需要常驻后台时候,此方法失效,
* 在小米 Note上此方法无效,在Nexus上正常
*
* @param context 上下文参数
* @param packageName 需要检查是否位于栈顶的App的包名
* @return
*/
public static boolean getRunningAppProcesses(Context context, String packageName) {
ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses();
if (appProcesses == null) {
return false;
}
for (ActivityManager.RunningAppProcessInfo appProcess : appProcesses) {
if (appProcess.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND && appProcess.processName.equals(packageName)) {
return true;
}
}
return false;
}
/**
* 判断Service是否正在运行
*
* @param context 上下文
* @param serviceName Service 类全名 如MyService.class.getName()
* @return true 表示正在运行,false 表示没有运行
*/
public static boolean isServiceRunning(Context context, String serviceName) {
ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningServiceInfo> serviceInfoList = manager.getRunningServices(30);
if (serviceInfoList == null || serviceInfoList.size() <= 0) {
return false;
}
for (ActivityManager.RunningServiceInfo info : serviceInfoList) {
if (info.service.getClassName().equals(serviceName)) {
return true;
}
}
return false;
}
Android判断App是否位于前台
發表評論
所有評論
還沒有人評論,想成為第一個評論的人麼? 請在上方評論欄輸入並且點擊發布.