获得root权限安装系统软件

package com.sfer.install;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.InputStream;
import java.io.OutputStream;

public final class RootCmd {
    // 执行linux命令并且输出结果
    protected static String execRootCmd(String paramString) {
        String result = "result : ";
        try {
            Process localProcess = Runtime.getRuntime().exec("su ");// 经过Root处理的android系统即有su命令
            OutputStream localOutputStream = localProcess.getOutputStream();
            DataOutputStream localDataOutputStream = new DataOutputStream(
                    localOutputStream);
            InputStream localInputStream = localProcess.getInputStream();
            DataInputStream localDataInputStream = new DataInputStream(
                    localInputStream);
            String str1 = String.valueOf(paramString);
            String str2 = str1 + "\n";
            localDataOutputStream.writeBytes(str2);
            localDataOutputStream.flush();
            String str3 = null;
//            while ((str3 = localDataInputStream.readLine()) != null) {
//                Log.d("result", str3);
//            }
            localDataOutputStream.writeBytes("exit\n");
            localDataOutputStream.flush();
            localProcess.waitFor();
            return result;
        } catch (Exception localException) {
            localException.printStackTrace();
            return result;
        }
    }

    // 执行linux命令但不关注结果输出
    protected static int execRootCmdSilent(String paramString) {
        try {
            Process localProcess = Runtime.getRuntime().exec("su");
            Object localObject = localProcess.getOutputStream();
            DataOutputStream localDataOutputStream = new DataOutputStream(
                    (OutputStream) localObject);
            String str = String.valueOf(paramString);
            localObject = str + "\n";
            localDataOutputStream.writeBytes((String) localObject);
            localDataOutputStream.flush();
            localDataOutputStream.writeBytes("exit\n");
            localDataOutputStream.flush();
            localProcess.waitFor();
            int result = localProcess.exitValue();
            return (Integer) result;
        } catch (Exception localException) {
            localException.printStackTrace();
            return -1;
        }
    }

    // 判断机器Android是否已经root，即是否获取root权限
    protected static boolean haveRoot() {

        int i = execRootCmdSilent("echo test"); // 通过执行测试命令来检测
        if (i != -1) {
            return true;
        }
        return false;
    }

}

package com.sfer.install;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;

public class InstallActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        String paramString= "$ adb push MySMS.apk /sdcard/" +"\n"+
                "$ adb shell" +"\n"+
                "$ su" +"\n"+
                "# mount -o remount,rw -t yaffs2 /dev/block/mtdblock3 /system" +"\n"+
                "# cat /sdcard/MySMS.apk > /system/app/MySMS.apk" +"\n"+
                "# mount -o remount,ro -t yaffs2 /dev/block/mtdblock3 /system" +"\n"+
                "# exit" +"\n"+
                "$ exit";        
        if(RootCmd.haveRoot()){
            if(RootCmd.execRootCmdSilent(paramString)==-1){
                Toast.makeText(this, "安装不成功", Toast.LENGTH_LONG).show();
            }else{
                Toast.makeText(this, "安装成功", Toast.LENGTH_LONG).show();
            }
        }else{
            Toast.makeText(this, "没有root权限", Toast.LENGTH_LONG).show();
        }
        
        
    }
}

另外参照:http://chongye89.iteye.com/blog/1412488

 

<1> : 获得root权限:su

<2> : mount -o rw,remount /system

<3> : cp /sdcard/Settings.apk /system/app