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分享android4.2中用程序调用shell命令不成功？
单位平台要升级成MTK4.2的方案，移植以前2.3的一堆遗老程序，发现个问题：Runtime.getRuntime().exec(command)在4.2中无效了，挺有趣的，大家探讨一下呗
结果：
public static void execCommand(String command) {
Process process = null;
DataOutputStream os = null;
try {
Log.e("*** DEBUG ***", "111111111111111111");
process = Runtime.getRuntime().exec("su");
Log.e("*** DEBUG ***", "222222222222222222");
InputStream inputstream = process.getInputStream();
InputStreamReader inputstreamreader = new InputStreamReader(inputstream);
BufferedReader bufferedreader = new BufferedReader(inputstreamreader);
Log.e("*** DEBUG ***", "3333333333333333331");
os = new DataOutputStream(process.getOutputStream());
//os.writeBytes(command+"\n");
os.writeBytes("ls \n");
os.writeBytes("exit\n");
os.flush();
Log.e("*** DEBUG ***", "444444444444444444444");
String line = "";
StringBuilder sb= new StringBuilder(line);
while ((line = bufferedreader.readLine()) != null) {
sb.append(line);
sb.append('\n');
}
//////////////
process.waitFor();
Log.e("*** DEBUG ***", "555555555555555 - " + sb.toString());
} catch (Exception e) {
Log.d("*** DEBUG ***", "Unexpected error - Here is what I know: "+e.getMessage());
//return false;
}
}结果：
05-29 00:50:56.967: E/*** DEBUG ***(6244): 111111111111111111
05-29 00:50:57.060: E/*** DEBUG ***(6244): 222222222222222222
05-29 00:50:57.061: E/*** DEBUG ***(6244): 3333333333333333331
05-29 00:50:57.062: E/*** DEBUG ***(6244): 444444444444444444444
05-29 00:50:57.065: E/*** DEBUG ***(6244): 555555555555555 -
...全文
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echoJiang 2014-06-03
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辛苦了，谢谢大哥，在shell下手动执行su，确实看到没有返回success/fail，恐怕是su命令有问题
echoJiang 2014-06-03
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少个回车符么?我试一下[/quote]
加了回车符没有效果，在shell下手动执行su，确实看到没有返回success/fail，恐怕是su命令有问题
韩曙亮 2014-06-03
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我修改了下 : 不用加 "\n"
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
public class Demo {
public static void main(String[] args) {
execCommand("ping www.baidu.com");
}
public static void execCommand(String command) {
Process process = null;
DataOutputStream os = null;
try {
process = Runtime.getRuntime().exec(command);
InputStream inputstream = process.getInputStream();
InputStreamReader inputstreamreader = new InputStreamReader(
inputstream);
BufferedReader bufferedreader = new BufferedReader(
inputstreamreader);
os = new DataOutputStream(process.getOutputStream());
// os.writeBytes(command+"\n");
os.writeBytes("ls \n");
os.writeBytes("exit\n");
os.flush();
String line = "";
StringBuilder sb = new StringBuilder(line);
while ((line = bufferedreader.readLine()) != null) {
sb.append(line);
System.out.println(line);
sb.append('\n');
}
process.waitFor();
} catch (Exception e) {
}
}
}
PING www.a.shifen.com (61.135.169.125) 56(84) bytes of data.
64 bytes from 61.135.169.125: icmp_req=1 ttl=56 time=12.8 ms
64 bytes from 61.135.169.125: icmp_req=2 ttl=56 time=157 ms
64 bytes from 61.135.169.125: icmp_req=3 ttl=56 time=12.2 ms
64 bytes from 61.135.169.125: icmp_req=4 ttl=56 time=12.6 ms
64 bytes from 61.135.169.125: icmp_req=5 ttl=56 time=281 ms
64 bytes from 61.135.169.125: icmp_req=6 ttl=56 time=972 ms
64 bytes from 61.135.169.125: icmp_req=7 ttl=56 time=35.0 ms
64 bytes from 61.135.169.125: icmp_req=8 ttl=56 time=59.5 ms
64 bytes from 61.135.169.125: icmp_req=9 ttl=56 time=393 ms
64 bytes from 61.135.169.125: icmp_req=10 ttl=56 time=138 ms
64 bytes from 61.135.169.125: icmp_req=11 ttl=56 time=954 msechoJiang 2014-06-03
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少个回车符么?我试一下
echoJiang 2014-06-03
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确实没有考虑到这个问题，app获得的是systemUID，root权限要怎么获得呢..
Linux-Torvalds 2014-06-02
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process = Runtime.getRuntime().exec("su\n");
echoJiang 2014-05-30
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是真机 已经root过来
荒颜 2014-05-30
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不知道你想表达什么 你机器root了你的应用没有root权限啊
不信你把执行su之后的inputstream输出看看
风吹得好舒服 2014-05-30
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http://bbs.csdn.net/topics/390329421
看一下这个帖子吧。。
风吹得好舒服 2014-05-29
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没有权限？等大神。。
