Question

我需要了解当前哪个应用程序在屏幕上的信息。例如，我已经按Facebook和Facebook在屏幕上，我按下主页按钮，屏幕上没有任何内容。我已经按谷歌Chrome浏览器获取谷歌浏览器位于屏幕顶部的信息。更准确地获取应用程序的包名称。看到一些实现，但它们都给了我相同的结果。

public class MyService extends Service {

private static MyService sMyService;

private static String foregroundPackageName;

public IBinder onBind(Intent intent) {
    sMyService = this;
    ActivityManager am = (ActivityManager) this.getSystemService(ACTIVITY_SERVICE);
    List<ActivityManager.RunningTaskInfo> taskInfo = am.getRunningTasks(1);
    Log.d("topActivity", "CURRENT Activity ::" + taskInfo.get(0).topActivity.getClassName());
    ComponentName componentInfo = taskInfo.get(0).topActivity;
    foregroundPackageName = componentInfo.getPackageName();
    System.out.println("THIS IS THE FOREGROUND 
    ::::::::::::::::"+foregroundPackageName);
    return null;
}

public static String getForegroundPackageName() {
    return foregroundPackageName;
}

@Nullable
@Override
public IBinder onBind(Intent intent) {
    return null;
}
}

这只是一个测试，看看我是否会获得屏幕上的活动但是所有时间都只是打印：

com.sec.android.app.launcher.activities.LauncherActivity。

Answer 1

此代码可以帮助您

ActivityManager am = (ActivityManager) this.getSystemService(ACTIVITY_SERVICE);
        List<ActivityManager.RunningTaskInfo> taskInfo = am.getRunningTasks(1);
        Log.d("topActivity", "CURRENT Activity ::" + taskInfo.get(0).topActivity.getClassName());
        ComponentName componentInfo = taskInfo.get(0).topActivity;

        PackageManager packageManager = getApplicationContext().getPackageManager();
        ApplicationInfo appInfo;
        try {
            appInfo = packageManager.getApplicationInfo( componentInfo.getPackageName(), 0);
        } catch (final PackageManager.NameNotFoundException e) {
            appInfo = null;
        }
        String appName = (String) (appInfo != null ? packageManager.getApplicationLabel(appInfo) : "(unknown)");


        Log.e("App Name",""+appName);

Answer 2

import android.app.ActivityManager;
import android.app.Service;
import android.app.usage.UsageStats;
import android.app.usage.UsageStatsManager;
import android.content.Context;
import android.content.Intent;
import android.os.Handler;
import android.os.IBinder;
import android.util.Log;

import java.util.List;
import java.util.SortedMap;
import java.util.TreeMap;

public class MyBackGroundService extends Service {

    private static MyBackGroundService sMyService;
    private Handler handler;


    @Override
    public void onCreate() {
        super.onCreate();
        sMyService = this;
        handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                printCurrentTask();
                handler.postDelayed(this,60);
            }
        },60);

    }

    public IBinder onBind(Intent intent) {

        return null;
    }

    public static String getForegroundPackageName() {
        return foregroundPackageName;
    }

    private String printCurrentTask() {
        String currentApp = "NULL";
        if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
            UsageStatsManager usm = (UsageStatsManager)this.getSystemService("usagestats");
            long time = System.currentTimeMillis();
            List<UsageStats> appList = usm.queryUsageStats(UsageStatsManager.INTERVAL_DAILY,  time - 1000*1000, time);
            if (appList != null && appList.size() > 0) {
                SortedMap<Long, UsageStats> mySortedMap = new TreeMap<Long, UsageStats>();
                for (UsageStats usageStats : appList) {
                    mySortedMap.put(usageStats.getLastTimeUsed(), usageStats);
                }
                if (mySortedMap != null && !mySortedMap.isEmpty()) {
                    currentApp = mySortedMap.get(mySortedMap.lastKey()).getPackageName();
                }
            }
        } else {
            ActivityManager am = (ActivityManager)this.getSystemService(Context.ACTIVITY_SERVICE);
            List<ActivityManager.RunningAppProcessInfo> tasks = am.getRunningAppProcesses();
            currentApp = tasks.get(0).processName;
        }

        Log.d("Top App ******", "Current Top Running App is: " + currentApp);
        return currentApp;
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        handler.removeCallbacks(null);
    }
}

为使用情况统计信息添加此权限

<uses-permission
        android:name="android.permission.PACKAGE_USAGE_STATS"
        tools:ignore="ProtectedPermissions"/>

即使你要求用户启用permision，如果没有启用它也无法正常工作

import android.app.AppOpsManager;
import android.app.usage.UsageStatsManager;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.provider.Settings;
import android.support.annotation.RequiresApi;
import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.AppCompatActivity;
import android.view.View;

import java.util.List;

public class MainActivity extends AppCompatActivity {

    Intent backGroundService;

    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        backGroundService = new Intent(MainActivity.this, MyBackGroundService.class);
        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                checkIfAppUsageAccess();
            }
        });

    }


    @RequiresApi(api = Build.VERSION_CODES.KITKAT)
    void checkIfAppUsageAccess(){
        boolean granted = false;
        AppOpsManager appOps = (AppOpsManager) this
                .getSystemService(Context.APP_OPS_SERVICE);
        int mode = appOps.checkOpNoThrow(AppOpsManager.OPSTR_GET_USAGE_STATS,
                android.os.Process.myUid(), getPackageName());

        if (mode == AppOpsManager.MODE_DEFAULT) {
            granted = (checkCallingOrSelfPermission(android.Manifest.permission.PACKAGE_USAGE_STATS) == PackageManager.PERMISSION_GRANTED);
        } else {
            granted = (mode == AppOpsManager.MODE_ALLOWED);
        }
        if (Build.VERSION.SDK_INT >= 21 && !granted) {
            UsageStatsManager mUsageStatsManager = (UsageStatsManager) getSystemService(Context.USAGE_STATS_SERVICE);
            long time = System.currentTimeMillis();
            List stats = mUsageStatsManager.queryUsageStats(UsageStatsManager.INTERVAL_DAILY, time - 1000 * 10, time);

            if (stats == null || stats.isEmpty()) {
                Intent intent = new Intent();
                intent.setAction(Settings.ACTION_USAGE_ACCESS_SETTINGS);
                startActivity(intent);
            }
        } else {
            startService(backGroundService);
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        stopService(backGroundService);
    }
}

此代码适用于android lollipop以及以下版本

获得屏幕应用程序

2 个答案: