如何在后台获取运行个应用程序名称？

Question

例如，Instagram 在后台运行。我想在 java.

中的 background 运行 application 上获取运行应用程序名称

Answer 1

没有默认方法可以执行此操作，您将需要外部库来实现此功能。我通过使用 jaredrummler android 库在我的应用程序中实现了一次。一个简单的用法如下图

Add to gradle

dependencies {
    ...
    compile 'com.jaredrummler:android-processes:1.1.1'
}

Create a wrapper Class Model

如果您想存储有关运行进程的基本信息以便在列表视图或其他地方使用它，您可以创建如下所示的包装器模型

...
import android.graphics.drawable.Drawable;

public class RunningApplication {
     public String processName, pid = "" ;
     public long startTime = 0 ;
     public Drawable processIcon = null ;

     public RunningApplication(String name, long start, String pid, Drawable icon) {
        this.processName = name ;
        this.startTime = start ;
        this.pid = pid ;
        this.processIcon = icon ;
     }

     public getProcessName() {
        return processname ;
     }

     ...

}

Use in you class

...
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;

import com.jaredrummler.android.processes.AndroidProcesses;
import com.jaredrummler.android.processes.models.AndroidAppProcess;
import com.jaredrummler.android.processes.models.Stat;
import com.jaredrummler.android.processes.models.Statm;

class YourClass extends Activity {
    List<RunningApplication> runningApplicationList = new ArrayList<>();

    ...
    public void getRunningApps() {
        List<AndroidAppProcess> processes = AndroidProcesses.getRunningAppProcesses();
        PackageManager pm = getPackageManager();
        for (AndroidAppProcess pro : processes) {
           try {
                String proccessname = pro.name;
                Stat stat = pro.stat();
                int pid = stat.getPid();
                int parentProccessId = stat.ppid();
                long startTime = stat.stime();
                int policy = stat.policy();
                char state = stat.state();

                Statm statm = pro.statm();
                long totalSizeofProccess = statm.getSize();
                long residentSetSize = statm.getResidentSetSize();

                PackageInfo packageInfo = pro.getPackageInfo(basecontext, 0);

                //get the app name
                String appName = packageInfo.applicationInfo.loadLabel(pm).toString();
                //Get the app icon
                Drawable appIcon = packageInfo.applicationInfo.loadIcon(pm);
                //Add it to your list of running app
                RunningApplication ra = new RunningApplication(appName,startTime,pid,appIcon);
                runningApplicationList.add(ra);
           } catch (Exception ex) {
                Log.e("APPNAME.CONTEXT",e.getMessage());
           }
        }
    }

}
...

注意： 我使用上面的代码已经一年多了，但当时它工作得很好，而且没有经过测试。您可以搜索 jaredrummler 库以获取更多信息和可能的更新

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如何在后台获取运行个应用程序名称？