android中的智能应用程序锁定应用程序如何检测应用程序启动？ [英] How does the smart app lock application in android detects application launch ?

问题描述

如何在Android应用程序中检测应用程序启动？

android中的Smart App Lock应用程序如何检测应用程序的启动？

 import android.app.ActivityManager; 
 import android.content.pm.ApplicationInfo; 
 import android.content.pm.PackageManager; 
 import android.support.v7.app.AppCompatActivity; 
 import android.os.Bundle; 
 import android.util.Log; 
 
 import java.util.Iterator; 
 import java.util.List; 
 
公共类MainActivity扩展AppCompatActivity 
 {
 public static final String TAG =MainActivity; 
 
 @Override 
 protected void onCreate（Bundle savedInstanceState）
 {
 super.onCreate（savedInstanceState）; 
 setContentView（R.layout.activity_main）; 
 
 final PackageManager packageManager = getPackageManager（）; 
 //获取已安装应用的列表。 
 List< ApplicationInfo> packages = packageManager.getInstalledApplications（PackageManager.GET_META_DATA）; 
 for（ApplicationInfo packageInfo：packages）{
 Log.d（TAG，Installed package：+ packageInfo.packageName）; 
 Log.d（TAG，Source dir：+ packageInfo.sourceDir）; 
 Log.d（TAG，启动活动：+ packageManager.getLaunchIntentForPackage（packageInfo.packageName））; 
} 
 
 ActivityManager activityManager =（ActivityManager）this.getSystemService（ACTIVITY_SERVICE）; 
 List l = activityManager.getRecentTasks（1，ActivityManager.RECENT_WITH_EXCLUDED）; 
 Iterator i = l.iterator（）; 
 
 while（i.hasNext（））{
 ActivityManager.RunningAppProcessInfo info =（ActivityManager.RunningAppProcessInfo）i.next（）; 
 try 
 {
 CharSequence c = packageManager.getApplicationLabel（packageManager.getApplicationInfo（
 info.processName，PackageManager.GET_META_DATA））; 
 Log.w（LABEL，c.toString（））; 
} catch（例外e）
 {} 
} 
} 
} 

我尝试了什么：



我尝试使用此代码片段来检测至少当前正在运行的应用程序。但这会抛出一个 Class Cast异常：

 android.app.ActivityManager $ RecentTaskInfo无法强制转换为android.app.ActivityManager $ RunningAppProcessInfo 

解决方案

RecentTaskInfo无法强制转换为android.app.ActivityManager

RunningAppProcessInfo

How to detect the application launch in android application ?
How does the Smart App Lock applications in android detect the launch of an application ?

import android.app.ActivityManager;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;

import java.util.Iterator;
import java.util.List;

public class MainActivity extends AppCompatActivity
{
public  static  final String TAG ="MainActivity";

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final PackageManager packageManager = getPackageManager();
        //get a list of installed apps.
        List<ApplicationInfo> packages = packageManager.getInstalledApplications(PackageManager.GET_META_DATA);
        for (ApplicationInfo packageInfo : packages) {
            Log.d(TAG, "Installed package :" + packageInfo.packageName);
            Log.d(TAG, "Source dir : " + packageInfo.sourceDir);
            Log.d(TAG, "Launch Activity :" + packageManager.getLaunchIntentForPackage(packageInfo.packageName));
        }

        ActivityManager activityManager = (ActivityManager) this.getSystemService(ACTIVITY_SERVICE);
        List l = activityManager.getRecentTasks(1, ActivityManager.RECENT_WITH_EXCLUDED);
        Iterator i = l.iterator();
        
        while (i.hasNext()) {
            ActivityManager.RunningAppProcessInfo info = (ActivityManager.RunningAppProcessInfo) i.next();
            try
            {
                CharSequence c = packageManager.getApplicationLabel(packageManager.getApplicationInfo(
                        info.processName, PackageManager.GET_META_DATA));
                Log.w("LABEL", c.toString());
            } catch (Exception e)
            {}
        }
    }
}

What I have tried:

I tried this snippet to detect atleast, the applications currently running. But this throws me a Class Cast Exception :

android.app.ActivityManager$RecentTaskInfo cannot be cast to android.app.ActivityManager$RunningAppProcessInfo

解决方案

RecentTaskInfo cannot be cast to android.app.ActivityManager

RunningAppProcessInfo

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