Android下的CMD命令之关机重启及重启recovery

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="clip_vertical"
android:orientation="vertical"
android:padding="15dp" >
<Button
android:id="@+id/btn_reboot"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:background="@drawable/btn_bg"
android:text="重启" />
<Button
android:id="@+id/btn_power"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:background="@drawable/btn_bg"
android:text="关机" />
<Button
android:id="@+id/btn_recovery"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:background="@drawable/btn_bg"
android:text="recovery" />
<Button
android:id="@+id/btn_finish"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="15dp"
android:background="@drawable/btn_bg"
android:text="退出" />
</LinearLayout>

package com.lgl.power;
import java.io.DataOutputStream;
import java.io.IOException;
import android.app.Activity;
import android.app.AlertDialog;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity implements OnClickListener {
private Button btn_reboot, btn_power, btn_recovery, btn_finish;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}
private void initView() {
btn_reboot = (Button) findViewById(R.id.btn_reboot);
btn_reboot.setOnClickListener(this);
btn_power = (Button) findViewById(R.id.btn_power);
btn_power.setOnClickListener(this);
btn_recovery = (Button) findViewById(R.id.btn_recovery);
btn_recovery.setOnClickListener(this);
btn_finish = (Button) findViewById(R.id.btn_finish);
btn_finish.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
// 重启
case R.id.btn_reboot:
// cmd命令
String cmd = "su -c reboot";
try {
// 发送请求
Runtime.getRuntime().exec(cmd);
} catch (IOException e) {
new AlertDialog.Builder(MainActivity.this).setTitle("很抱歉")
.setMessage("你的手机未ROOT，无法实现该功能！")
.setPositiveButton("OK", null).show();
}
break;
// 关机
case R.id.btn_power:
try {
// 获取管理员权限su
Process process = Runtime.getRuntime().exec("su");
// 输入命令
DataOutputStream out = new DataOutputStream(
process.getOutputStream());
out.writeBytes("reboot -p\n");
// 结束
out.writeBytes("exit\n");
out.flush();
} catch (IOException e) {
new AlertDialog.Builder(MainActivity.this).setTitle("很抱歉")
.setMessage("你的手机未ROOT，无法实现该功能！")
.setPositiveButton("OK", null).show();
}
break;
// recovery
case R.id.btn_recovery:
try {
// 同关机原理
Process process = Runtime.getRuntime().exec("su");
DataOutputStream out = new DataOutputStream(
process.getOutputStream());
out.writeBytes("reboot recovery\n");
out.writeBytes("exit\n");
out.flush();
} catch (IOException e) {
new AlertDialog.Builder(MainActivity.this).setTitle("很抱歉")
.setMessage("你的手机未ROOT，无法实现该功能！")
.setPositiveButton("OK", null).show();
}
break;
// 退出
case R.id.btn_finish:
finish();
break;
}
}
}