android - 以编程方式重启设备

Question

我正在构建仅供我使用的后台服务。我需要根据特定条件重启我的设备。

1. 我了解要重启设备的应用程序/服务，它需要是系统应用程序。

2. 既然我只会使用这个应用程序，有没有办法为我的设备签名并将其用于所述目的(根据条件重新启动)

3. 如果是，请指点如何对一个应用进行签名，使其成为一个系统应用，如果.apk可以像其他apk一样正常安装

4. 如果条件 2 满足，任何重启的代码引用也将帮助我启动项目

我用的是小米手机，Android 6.0。我想在不对我的设备进行 root 的情况下实现这一目标。

添加代码

        if (ContextCompat.checkSelfPermission(MainActivity.this,
            Manifest.permission.REBOOT)
            != PackageManager.PERMISSION_GRANTED) {


        System.out.println("Permission Ask");

        if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this,
                Manifest.permission.REBOOT)) {
            // Show an explanation to the user *asynchronously* -- don't block
            // this thread waiting for the user's response! After the user
            // sees the explanation, try again to request the permission.
            Toast.makeText(MainActivity.this,"Explain",Toast.LENGTH_LONG).show();
        } else {

            ActivityCompat.requestPermissions(MainActivity.this,
                    new String[]{Manifest.permission.REBOOT},
                    MY_PERMISSIONS_REQUEST_REBOOT);
        }

    } else {
        // Permission has already been granted
        Toast.makeText(MainActivity.this,"You have been granter permission",Toast.LENGTH_LONG).show();
    }

@Override
    public void onRequestPermissionsResult(int requestCode,
                                           String permissions[], int[] grantResults) {

       if (requestCode == MY_PERMISSIONS_REQUEST_REBOOT) {
                // If request is cancelled, the result arrays are empty.
                if (grantResults.length > 0
                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    // permission was granted, yay! Do the
                    // contacts-related task you need to do.

                    Toast.makeText(MainActivity.this,"Permission Done",Toast.LENGTH_LONG).show();
                } else {
                    // permission denied, boo! Disable the
                    // functionality that depends on this permission.

                    Toast.makeText(MainActivity.this, "Permission Not Done", Toast.LENGTH_LONG).show();

                }
            }

            // other 'case' lines to check for other
            // permissions this app might request.
        }

Answer 1

如果你想让设备重启(关机再开机)，试试PowerManager.reboot()

PowerManager powerManager = (PowerManager)getSystemService(Context.POWER_SERVICE);
powerManager.reboot(null);

android.os.PowerManager:

  /**
 * Reboot the device.  Will not return if the reboot is successful.
 * <p>
 * Requires the {@link android.Manifest.permission#REBOOT} permission.
 * </p>
 *
 * @param reason code to pass to the kernel (e.g., "recovery") to
 *               request special boot modes, or null.
 */
public void reboot(String reason) {
    try {
        mService.reboot(false, reason, true);
    } catch (RemoteException e) {
    }
}

如果您想完全关闭设备，请使用 PowerManagerService.shutdown()

  IPowerManager powerManager = IPowerManager.Stub.asInterface(
        ServiceManager.getService(Context.POWER_SERVICE));
try {
    powerManager.shutdown(false, false);
} catch (RemoteException e) {
}




   /**
 * Shuts down the device.
 *
 * @param confirm If true, shows a shutdown confirmation dialog.
 * @param wait If true, this call waits for the shutdown to complete and does not return.
 */
@Override // Binder call
public void shutdown(boolean confirm, boolean wait) {
    mContext.enforceCallingOrSelfPermission(android.Manifest.permission.REBOOT, null);

    final long ident = Binder.clearCallingIdentity();
    try {
        shutdownOrRebootInternal(true, confirm, null, wait);
    } finally {
        Binder.restoreCallingIdentity(ident);
    }
}