Android implements the system restart function
- 2020-05-19 05:44:04
- OfStack
First define the layout file:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.hzhi.restart"
android:versionCode="1"
android:versionName="1.0"
android:installLocation="preferExternal"
android:sharedUserId="android.uid.system">
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.hzhi.restart.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
The layout file is very simple, just one button. Note that android:sharedUserId=" android.uid.system ", this is for the application to share 1 system level UID, otherwise there will be an error of permission denial.
Class files:
package com.hzhi.restart;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
public void click(View view){
Intent intent = new Intent();
intent.setAction(Intent.ACTION_REBOOT);
intent.putExtra("nowait", 1);
intent.putExtra("interval", 1);
intent.putExtra("startTime", 1);
intent.putExtra("window", 0);
sendBroadcast(intent);
}
}
Errors occur when the program is run because the system's default signature is used instead of a system-level signature. The solution is to remove the default signature and replace it with a system-level signature.