java - 如何使 getRunningAppProcesses() 在 Android L 及更高版本中工作

Question

我正在尝试开发一个 Android 应用程序，当用户打开 WhatsApp 应用程序时，它只会显示一条 Toast 消息，显示“WhatsApp 正在运行”。

我正在使用以下代码来完成这项工作，但它不起作用。有什么方法可以让它在所有设备上运行，包括Android L和M

我查了很多资料，也没有找到正确的答案。

public void WhatsApp() {

        final String str = "";
        int whatsapplaunched = 0;
        int whatsappclosed =0;
        int whatsapplaunches = 1;

        ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
        List<ActivityManager.RunningAppProcessInfo> runningAppProcessInfo = am.getRunningAppProcesses();

        for ( ActivityManager.RunningAppProcessInfo appProcess: runningAppProcessInfo ) {
            Log.d(appProcess.processName.toString(),"is running");
            if (appProcess.processName.equals("com.whatsapp")) {
                if (appProcess.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND){
                    if (whatsapplaunched == 0 ){
                        whatsapplaunched = 1;
                        Log.d(str,"WhatsApp has been launched");
                        Toast.makeText(getApplicationContext(), "WhatsApp is running", Toast.LENGTH_LONG).show();
                    } // Last If Ends
                    else if (whatsappclosed == 1){
                        whatsapplaunches++;
                        whatsappclosed = 0;
                        Log.d(String.valueOf(whatsapplaunches),"counter");
                    } // Else If Ends
                } // 2 IF Ends
                else {
                    whatsappclosed = 1;
                    Log.d(str,"WhatsApp has been closed");
                } // Else Ends
            } // Main If Ends
        } // For Ends
}

提前致谢

Answer 1

您可以尝试此代码

  ActivityManager manager=(ActivityManager)this.getSystemService(Context.ACTIVITY_SERVICE);
    List<ActivityManager.RunningAppProcessInfo> processes=manager.getRunningAppProcesses();
    int i=0;
    for(ActivityManager.RunningAppProcessInfo process:processes)
    {
       if(process.processName.contains("com.whatsapp"))
                {
                   Toast.makeText(getBaseContext(), "Whatsapp running", Toast.LENGTH_SHORT).show();
                }
                break;
    }