android 判断App进程是否存在，处在前台，后台，前后台切换，service是否运行，设置为系统app

╰半橙微兮° 2022-05-12 13:50 1051阅读 0赞

### 1.判断进程是否存在 ###

//判断是否在主进程,这个方法判断进程名或者pid都可以,如果进程名一样那pid肯定也一样
    //true:当前进程是主进程 false:当前进程不是主进程
    public boolean isUIProcess() {
     ActivityManager am = ((ActivityManager) getSystemService(Context.ACTIVITY_SERVICE));
     List<ActivityManager.RunningAppProcessInfo> processInfos = am.getRunningAppProcesses();
     String mainProcessName = getPackageName();
     int myPid = android.os.Process.myPid();
     for (ActivityManager.RunningAppProcessInfo info : processInfos) {
      if (info.pid == myPid && mainProcessName.equals(info.processName)) {
       return true;
      }
     }
     return false;
    }

### 2.判断服务是否存在 ###

/**
     * 判断service是否已经运行
     * 必须判断uid,因为可能有重名的Service,所以要找自己程序的Service,不同进程只要是同一个程序就是同一个uid,个人理解android系统中一个程序就是一个用户
     * 用pid替换uid进行判断强烈不建议,因为如果是远程Service的话,主进程的pid和远程Service的pid不是一个值,在主进程调用该方法会导致Service即使已经运行也会认为没有运行
     * 如果Service和主进程是一个进程的话,用pid不会出错,但是这种方法强烈不建议,如果你后来把Service改成了远程Service,这时候判断就出错了
     *
     * @param className Service的全名,例如PushService.class.getName()
     * @return true:Service已运行 false:Service未运行
     */
    
    public boolean isServiceExisted(String className) {
     ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
     List<ActivityManager.RunningServiceInfo> serviceList = am.getRunningServices(Integer.MAX_VALUE);
     int myUid = android.os.Process.myUid();
     for (ActivityManager.RunningServiceInfo runningServiceInfo : serviceList) {
      if (runningServiceInfo.uid == myUid && runningServiceInfo.service.getClassName().equals(className)) {
       return true;
      }
     }
     return false;
    }

### 3.app是否在前台 ###

是否在前台
     private boolean isAppForeground(String packageName) {
            ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
            ComponentName cn = am.getRunningTasks(1).get(0).topActivity;
            String currentPackageName = cn.getPackageName();
            if (!TextUtils.isEmpty(currentPackageName) && currentPackageName.equals(packageName)) {
                return true;
            }
    
            return false;
        }
    
    把应用置为前台
    moveTaskToFront() 
    moveTaskToBack()
    
     private void bring2Front() {
            ActivityManager activtyManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
            List<ActivityManager.RunningTaskInfo> runningTaskInfos = activtyManager.getRunningTasks(3);
            for (ActivityManager.RunningTaskInfo runningTaskInfo : runningTaskInfos) {
                if (this.getPackageName().equals(runningTaskInfo.topActivity.getPackageName())) {
                    activtyManager.moveTaskToFront(runningTaskInfo.id, ActivityManager.MOVE_TASK_WITH_HOME);
                    return;
                }
            }
        }
    
    回到系统桌面
    private void back2Home() {
            Intent home = new Intent(Intent.ACTION_MAIN);
    
            home.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            home.addCategory(Intent.CATEGORY_HOME);
    
            startActivity(home);
        }

4.手机锁

系统是否在锁屏状态
     private boolean isScreenLocked() {
            KeyguardManager keyguardManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);
            return keyguardManager.inKeyguardRestrictedInputMode();
        }
    private void wakeAndUnlock() {
            //获取电源管理器对象
            PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
    
            //获取PowerManager.WakeLock对象，后面的参数|表示同时传入两个值，最后的是调试用的Tag
            PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.ACQUIRE_CAUSES_WAKEUP | PowerManager.SCREEN_BRIGHT_WAKE_LOCK, "bright");
    
            //点亮屏幕
            wl.acquire(1000);
    
            //得到键盘锁管理器对象
            KeyguardManager km = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE);
            kl = km.newKeyguardLock("unLock");
    
            //解锁
            kl.disableKeyguard();
    
        }
    
     private void release() {
            if (locked && kl != null) {
                android.util.Log.d("maptrix", "release the lock");
                //得到键盘锁管理器对象
                kl.reenableKeyguard();
                locked = false;
            }
        }

### 5.系统app ###

[参考][Link 1]

参考
    public void onclick(View view) {
    
            DataOutputStream dataOutputStream = null;
    
    
            BufferedReader err = null;
    
            try {
    
                //得到su权限
                Process process = Runtime.getRuntime().exec("su root");
                //输出命令
                dataOutputStream = new DataOutputStream(process.getOutputStream());
                //获取外部sd路径
                File externalStorageDirectory = Environment.getExternalStorageDirectory();
                //得到apk文件路径
                File apkFile = new File(externalStorageDirectory.getAbsoluteFile()+File.separator+"youjiayou.apk");
                //移动文件命令
                String command = "cp  " + apkFile.getAbsolutePath() + " system/app\n";
                //挂载为system可写 不然无法写入文件 = = 这些坑我是一点点 踩过的
                dataOutputStream.writeBytes("mount -o remount rw /system\n");
                //输出命令
                dataOutputStream.write(command.getBytes("UTF-8"));
                //挂载为可写不然无法生效
                dataOutputStream.writeBytes("chmod 777 /system/app/youjiayou.apk\n");
                //挂载为可读
                dataOutputStream.writeBytes("mount -o remount ro /system\n");
    
                //刷新输出
                dataOutputStream.flush();
                //重启
                dataOutputStream.writeBytes("reboot\n");
                //退出
                dataOutputStream.writeBytes("exit\n");
                //刷新输出
                dataOutputStream.flush();
                //等候命令结束
                process.waitFor();
    
                String line;
    
                String msg = "";
    
                //读取控制台返回的数据
                err = new BufferedReader(new InputStreamReader(process.getInputStream()));
    
                //读取数据
                while ((line = err.readLine()) != null) {
                    msg += line;
                }
    
                Log.e("Fmy", "结果 " +msg);
    
            } catch (Exception e) {
    //          e.printStackTrace();
    
                Log.e("Fmy", "发生异常" + e.getMessage());
            } finally {
                try {
                    if (dataOutputStream != null) {
                        dataOutputStream.close();
                    }
    
                    if (err != null) {
                        err.close();
                    }
    
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
    
    
        }

[Link 1]: https://blog.csdn.net/xx326664162/article/details/53406933