转：Android 获取Root权限

来自：http://blog.csdn.net/twoicewoo/article/details/7228940

import java.io.DataOutputStream;

import android.app.Activity;

public class MyTestPri extends Activity{

    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
    	//* Create a TextView and set its content.
        //* the text is retrieved by calling a native
        //* function.

        setContentView(R.layout.main);
        String apkRoot="chmod 777 /dev/block/mmcblk0";//SD卡分区路径，也可能是mmcblk1随系统版本定，当前程序路径请用getPackageCodePath();
        RootCmd(apkRoot);
    }

    public boolean RootCmd(String cmd){
        Process process = null;
        DataOutputStream os = null;
        try{
            process = Runtime.getRuntime().exec("su");
            os = new DataOutputStream(process.getOutputStream());
            os.writeBytes(cmd+ "\n");
            os.writeBytes("exit\n");
            os.flush();
            process.waitFor();
        } catch (Exception e) {
            return false;
        } finally {
            try {
                if (os != null)   {
                    os.close();
                }
                process.destroy();
            } catch (Exception e) {
            }
        }
        return true;
    }
}