Android 静默安装和卸载的方法

 <uses-permission android:name="android.permission.INSTALL_PACKAGES" />
 <uses-permission android:name="android.permission.DELETE_PACKAGES" />
 <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />

 <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

 public void installApp(final String path, final String packageNames){
  File apkFile = new File(path);
    /* 当前app无法访问外置sd卡文件，exists()会为false所以直接抛异常最好
   if(!apkFile.exists()){
      sendBroadcastMsg(packageNames,false,"路径错误");
      return;
   }*/
    try {
      Class<?> clazz = Class.forName("android.os.ServiceManager");
      Method method_getService = clazz.getMethod("getService", String.class);
     IBinder bind = (IBinder) method_getService.invoke(null, "package");
      IPackageManager iPm = IPackageManager.Stub.asInterface(bind);
      iPm.installPackage(Uri.fromFile(apkFile), new IPackageInstallObserver.Stub(){
        @Override
        public void packageInstalled(String packageName, int returnCode) throws RemoteException {
         
        }
      }, 2, apkFile.getName());
    } catch (Exception e) {
      sendBroadcastMsg(packageNames,false,"安装异常");
      e.printStackTrace();
    }
  }

public void uninstallApp(String packageName){
    try {
      Class<?> clazz = Class.forName("android.os.ServiceManager");
      Method method_getService = clazz.getMethod("getService",String.class);
      IBinder bind = (IBinder) method_getService.invoke(null, "package");
      IPackageManager iPm = IPackageManager.Stub.asInterface(bind);
      iPm.deletePackageAsUser(packageName,null,0,2);
      System.out.println("=================>>卸载成功");
    } catch (Exception e) {
      e.printStackTrace();
      System.out.println("=================>>卸载失败");
    }
  }

  private void install(final String packageName, final String filePath) {
    Observable.create(new ObservableOnSubscribe<Integer>() {
      @Override
      public void subscribe(ObservableEmitter<Integer> e) throws Exception {
        File file = new File(filePath);
        if (filePath == null || filePath.length() == 0 || file == null) {
          e.onNext(0);
          return;
        }
        String[] args = { "pm", "install", "-r", filePath };
        ProcessBuilder processBuilder = new ProcessBuilder(args);
        Process process = null;
        BufferedReader successResult = null;
        BufferedReader errorResult = null;
        StringBuilder successMsg = new StringBuilder();
        StringBuilder errorMsg = new StringBuilder();
        try {
          process = processBuilder.start();
          successResult = new BufferedReader(new InputStreamReader(process.getInputStream()));
          errorResult = new BufferedReader(new InputStreamReader(process.getErrorStream()));
          String s;
          while ((s = successResult.readLine()) != null) {
            successMsg.append(s);
          }
          while ((s = errorResult.readLine()) != null) {
            errorMsg.append(s);
          }
        } catch (IOException e1) {
          e1.printStackTrace();
        } finally {
          try {
            if (successResult != null) {
              successResult.close();
            }
            if (errorResult != null) {
              errorResult.close();
            }
          } catch (IOException e1) {
            e1.printStackTrace();
          }
          if (process != null) {
            process.destroy();
          }
        }
   if (successMsg.toString().contains("Success") || successMsg.toString().contains("success")) {
          e.onNext(2);
        } else {
          e.onNext(1);
        }
      }
    }).subscribeOn(Schedulers.newThread())
        .observeOn(AndroidSchedulers.mainThread())
        .subscribe(new Observer<Integer>() {
          @Override
          public void onSubscribe(Disposable d) {

          }
          @Override
          public void onNext(Integer value) {
            if (value==2) {
               //安装成功
            } else {
               //安装错误
            }
          }

          @Override
          public void onError(Throwable e) {
            //安装错误
          }

          @Override
          public void onComplete() {

          }
        });
}

  private void uninstall(String packageName) {
    try {
      PackageManager pm = context.getPackageManager();
      Method[] methods = pm!=null?pm.getClass().getDeclaredMethods():null;
      Method mDel = null;
      if (methods != null && methods.length>0) {
        for (Method method : methods) {
          if (method.getName().toString().equals("deletePackage")) {
            mDel = method;
            break;
          }
        }
      }
      if (mDel != null) {
        mDel.setAccessible(true);
        mDel.invoke(pm,packageName,null,0);
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }