如何在android程序中执行adb shell命令

2025-03-23 13:53:53
推荐回答(2个)
回答1:

一、方法

代码如下:

/**
* 执行一个shell命令,并返回字符串值
*
* @param cmd
* 命令名称&参数组成的数组(例如:{"/system/bin/cat", "/proc/version"})
* @param workdirectory
* 命令执行路径(例如:"system/bin/")
* @return 执行结果组成的字符串
* @throws IOException
*/
public static synchronized String run(String[] cmd, String workdirectory)
throws IOException {
StringBuffer result = new StringBuffer();
try {
// 创建操作系统进程(也可以由Runtime.exec()启动)
// Runtime runtime = Runtime.getRuntime();
// Process proc = runtime.exec(cmd);
// InputStream inputstream = proc.getInputStream();
ProcessBuilder builder = new ProcessBuilder(cmd);
InputStream in = null;
// 设置一个路径(绝对路径了就不一定需要)
if (workdirectory != null) {
// 设置工作目录(同上)
builder.directory(new File(workdirectory));
// 合并标准错误和标准输出
builder.redirectErrorStream(true);
// 启动一个新进程
Process process = builder.start();
// 读取进程标准输出流
in = process.getInputStream();
byte[] re = new byte[1024];
while (in.read(re) != -1) {
result = result.append(new String(re));
}
}
// 关闭输入流
if (in != null) {
in.close();
}
} catch (Exception ex) {
ex.printStackTrace();
}
return result.toString();
}

二、用途
执行Linux下的top、ps等命令,这些命令你也通过adb可以执行查看效果。
1)top命令如下:

复制代码 代码如下:

adb shell
$ top -h
top -h
Usage: top [-m max_procs] [-n iterations] [-d delay] [-s sort_column] [-t] [-h]
-m num Maximum number of processes to display. // 最多显示多少个进程
-n num Updates to show before exiting. // 刷新次数
-d num Seconds to wait between updates. // 刷新间隔时间(默认5秒)
-s col Column to sort by // 按哪列排序
-t Show threads instead of processes. // 显示线程信息而不是进程
-h Display this help screen. // 显示帮助文档
$ top -n 1
top -n 1

就不把执行效果放上来了,总之结果表述如下:

代码如下:

User 35%, System 13%, IOW 0%, IRQ 0% // CPU占用率
User 109 + Nice 0 + Sys 40 + Idle 156 + IOW 0 + IRQ 0 + SIRQ 1 = 306 // CPU使用情况
PID CPU% S #THR VSS RSS PCY UID Name // 进程属性
xx xx% x xx xx xx xx xx xx
CPU占用率:
User 用户进程
System 系统进程
IOW IO等待时间
IRQ 硬中断时间
CPU使用情况(指一个最小时间片内所占时间,单位jiffies。或者指所占进程数):
User 处于用户态的运行时间,不包含优先值为负进程
Nice 优先值为负的进程所占用的CPU时间
Sys 处于核心态的运行时间
Idle 除IO等待时间以外的其它等待时间
IOW IO等待时间
IRQ 硬中断时间
SIRQ 软中断时间
进程属性:
PID 进程在系统中的ID
CPU% 当前瞬时所以使用CPU占用率
S 进程的状态,其中S表示休眠,R表示正在运行,Z表示僵死状态,N表示该进程优先值是负数。
#THR 程序当前所用的线程数
VSS Virtual Set Size 虚拟耗用内存(包含共享库占用的内存)
RSS Resident Set Size 实际使用物理内存(包含共享库占用的内存)
PCY OOXX,不知道什么东东
UID 运行当前进程的用户id
Name 程序名称android.process.media
// ps:内存占用大小有如下规律:VSS >= RSS >= PSS >= USS
// PSS Proportional Set Size 实际使用的物理内存(比例分配共享库占用的内存)
// USS Unique Set Size 进程独自占用的物理内存(不包含共享库占用的内存)

在附件Android系统->android top.txt文件内,自个总结的。
2)执行代码

代码如下:

// top命令
public static final String[] TOP = { "/system/bin/top", "-n", "1" };
// 现在执行top -n 1,我们只需要第二行(用第二行求得CPU占用率,精确数据)
// 第一行:User 35%, System 13%, IOW 0%, IRQ 0% // CPU占用率
// 第二行:User 109 + Nice 0 + Sys 40 + Idle 156 + IOW 0 + IRQ 0 + SIRQ 1 = 306
// // CPU使用情况
public static synchronized String run(String[] cmd) {
String line = "";
InputStream is = null;
try {
Runtime runtime = Runtime.getRuntime();
Process proc = runtime.exec(cmd);
is = proc.getInputStream();
// 换成BufferedReader
BufferedReader buf = new BufferedReader(new InputStreamReader(is));
do {
line = buf.readLine();
// 前面有几个空行
if (line.startsWith("User")) {
// 读到第一行时,我们再读取下一行
line = buf.readLine();
break;
}
} while (true);
if (is != null) {
buf.close();
is.close();
}
} catch (IOException e) {
e.printStackTrace();
}
return line;
}
// 获取指定应用的top命令获取的信息
// PID CPU% S #THR VSS RSS PCY UID Name // 进程属性
// 如果当前应用不在运行则返回null
public static synchronized String run(String[] cmd, String pkgName) {
String line = null;
InputStream is = null;
try {
Runtime runtime = Runtime.getRuntime();
Process proc = runtime.exec(cmd);
is = proc.getInputStream();
// 换成BufferedReader
BufferedReader buf = new BufferedReader(new InputStreamReader(is));
do {
line = buf.readLine();
// 读取到相应pkgName跳出循环(或者未找到)
if (null == line || line.endsWith(pkgName)) {
break;
}
} while (true);
if (is != null) {
buf.close();
is.close();
}
} catch (IOException e) {
e.printStackTrace();
}
return line;
}

回答2:

package net.gimite.nativeexe;

import java.io.BufferedReader;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

import net.gimite.nativeexe.R;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.*;

public class MainActivity extends Activity {

private TextView outputView;
private Button localRunButton;
private EditText localPathEdit;
private Handler handler = new Handler();
private EditText urlEdit;
private Button remoteRunButton;

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

outputView = (TextView)findViewById(R.id.outputView);
localPathEdit = (EditText)findViewById(R.id.localPathEdit);
localRunButton = (Button)findViewById(R.id.localRunButton);
localRunButton.setOnClickListener(onLocalRunButtonClick);

}

private OnClickListener onLocalRunButtonClick = new OnClickListener() {
public void onClick(View v) {
String output = exec(localPathEdit.getText().toString());
output(output);
// try {
//
// // Process process = Runtime.getRuntime().exec(localPathEdit.getText().toString());
//
// } catch (IOException e) {
// // TODO Auto-generated catch block
// e.printStackTrace();
// }
}
};

// Executes UNIX command.
private String exec(String command) {
try {
Process process = Runtime.getRuntime().exec(command);
BufferedReader reader = new BufferedReader(
new InputStreamReader(process.getInputStream()));
int read;
char[] buffer = new char[4096];
StringBuffer output = new StringBuffer();
while ((read = reader.read(buffer)) > 0) {
output.append(buffer, 0, read);
}
reader.close();
process.waitFor();
return output.toString();
} catch (IOException e) {
throw new RuntimeException(e);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}

private void download(String urlStr, String localPath) {
try {
URL url = new URL(urlStr);
HttpURLConnection urlconn = (HttpURLConnection)url.openConnection();
urlconn.setRequestMethod("GET");
urlconn.setInstanceFollowRedirects(true);
urlconn.connect();
InputStream in = urlconn.getInputStream();
FileOutputStream out = new FileOutputStream(localPath);
int read;
byte[] buffer = new byte[4096];
while ((read = in.read(buffer)) > 0) {
out.write(buffer, 0, read);
}
out.close();
in.close();
urlconn.disconnect();
} catch (MalformedURLException e) {
throw new RuntimeException(e);
} catch (IOException e) {
throw new RuntimeException(e);
}
}

private void output(final String str) {
Runnable proc = new Runnable() {
public void run() {
outputView.setText(str);
}
};
handler.post(proc);
}

}

要加入权限

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