Android: 通过Runtime.getRuntime().exec调用底层Linux下的程序或脚本

Android Runtime使得直接调用底层Linux下的可执行程序或脚本成为可能

比如Linux下写个测试工具，直接编译后apk中通过Runtime来调用

或者写个脚本，apk中直接调用，省去中间层或者JNI

这个至少效率应该比较高吧










代码:

[java] view
plaincopy

public class test extends Activity {

TextView text;



/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);



text = (TextView) findViewById(R.id.text);



Button btn_ls = (Button) findViewById(R.id.btn_ls);

btn_ls.setOnClickListener(new OnClickListener() {

public void onClick(View v) {

do_exec("ls /mnt/sdcard");

}

});

Button btn_cat = (Button) findViewById(R.id.btn_cat);

btn_cat.setOnClickListener(new OnClickListener() {

public void onClick(View v) {

do_exec("cat /proc/version");

}

});

Button btn_rm = (Button) findViewById(R.id.btn_rm);

btn_rm.setOnClickListener(new OnClickListener() {

public void onClick(View v) {

do_exec("rm /mnt/sdcard/1.jpg");

}

});

Button btn_sh = (Button) findViewById(R.id.btn_sh);

btn_sh.setOnClickListener(new OnClickListener() {

public void onClick(View v) {

do_exec("/system/bin/sh /mnt/sdcard/test.sh 123");

}

});

}



String do_exec(String cmd) {

String s = "/n";

try {

Process p = Runtime.getRuntime().exec(cmd);

BufferedReader in = new BufferedReader(

new InputStreamReader(p.getInputStream()));

String line = null;

while ((line = in.readLine()) != null) {

s += line + "/n";

}

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

text.setText(s);

return cmd;

}

}



test.sh:

echo test.sh

echo $1



需要注意:

1. exec不等于console命令

2. exec的输入输出流需要自己处理

3. exec执行时阻塞、非阻塞，返回结果问题

4. 注意权限问题



有个文章讲的比较深入，贴出来研究:

http://blog.csdn.net/zmyde2010/archive/2011/01/12/6130895.aspx

http://kuangbaoxu.javaeye.com/blog/210291