Android 执行Linux命令工具类

最新推荐文章于 2021-05-25 20:26:47 发布

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本文介绍了ShellUtil类，展示了如何使用Java运行普通Linux命令和需要root权限的命令，包括命令执行、输入输出流处理及错误捕获。

package com.example.testmemenoughshell;

import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import android.util.Log;

public class ShellUtil {
	private static String TAG = "ShellUtil";

	public static String runCommand(String command) {// 运行普通linux命令
		Process process = null;
		String result = "false";
		try {
			process = Runtime.getRuntime().exec(command);
			process.waitFor();
			result = inputStreamToString(process.getInputStream());
			Log.e(TAG, result);
		} catch (Exception e) {
			return result;
		} finally {
			try {
				process.destroy();
			} catch (Exception e) {
			}
		}
		return result;
	}

	public static String runRootCmd(String cmd) {// 运行需要root权限的命令
		Process process = null;
		DataOutputStream os = null;
		String result = "false";
		try {
			process = Runtime.getRuntime().exec("su");
			OutputStream outstream = process.getOutputStream();
			DataOutputStream dataOutputStream = new DataOutputStream(outstream);
			String temp = cmd + "\n";
			dataOutputStream.writeBytes(temp);
			dataOutputStream.flush();
			dataOutputStream.writeBytes("exit\n");
			dataOutputStream.flush();
			process.waitFor();
			result = inputStreamToString(process.getInputStream());
			Log.e(TAG, result);

		} catch (Exception e) {
			return result;
		} finally {

			try {
				if (os != null) {
					os.close();
				}
				process.destroy();
			} catch (Exception e) {
			}
		}
		return result;
	}

	// inputStream转换成String
	public static String inputStreamToString(InputStream in) throws IOException {
		StringBuffer out = new StringBuffer();
		byte[] b = new byte[4096];
		for (int n; (n = in.read(b)) != -1;) {
			out.append(new String(b, 0, n));
		}
		return out.toString();
	}
}