Android 编写使用root权限的android应用程序

package com.iaiai;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;

/**
 * 
 * <p>
 * Title: MainActivity.java
 * </p>
 * <p>
 * E-Mail: [e-mail]
 * </p>
 * <p>
 * QQ: 176291935
 * </p>
 * <p>
 * Http: iaiai.iteye.com
 * </p>
 * <p>
 * Create time: 2011-10-11
 * </p>
 * 
 * @author 丸子
 * @version 0.0.1
 */
public class MainActivity extends Activity {

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);

		runRootCommand("ls");
	}

	public static boolean runRootCommand(String command) {
		Process process = null;
		DataOutputStream os = null;
		try {
			process = Runtime.getRuntime().exec("su");

			os = new DataOutputStream(process.getOutputStream());
			os.writeBytes(command + "\n");

			os.writeBytes("exit\n");
			os.flush();
			process.waitFor();

			BufferedReader br = new BufferedReader(new InputStreamReader(
					process.getInputStream()));
			// BufferedReader br = new BufferedReader(new InputStreamReader(
			// process.getErrorStream())); //如果出错用这个输出一下看结果，一定要获取root权限才可以执行
			String line = null;
			while ((line = br.readLine()) != null) {
				Log.d("*********", line);
			}
			try {
				br.close();
			} catch (Exception e) {
				e.printStackTrace();
			}
		} catch (Exception e) {
			Log.d("*********",
					"the device is not rooted, error message: "
							+ e.getMessage());
			return false;
		} finally {
			try {
				if (os != null) {
					os.close();
				}
				if (process != null) {
					process.destroy();
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		return true;
	}

}