Android获取系统文件目录，让程序访问其他程序的/data/data下的私有文件

package com.example.rootexploretest;

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

import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

ListView lvFile = (ListView) findViewById(R.id.listFile);
String[] content = getRootFileContent("/data/data"); //获取/data/data目录下的文件(夹)

lvFile.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, content));
}

public static String[] getRootFileContent(String strPath) {
Process process = null;
DataOutputStream os = null;
String allList = "";
String strItems[] = null;
try {
process = Runtime.getRuntime().exec("su"); // 切换到root帐号
os = new DataOutputStream(process.getOutputStream());
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream()), 1024);

os.writeBytes("ls " + strPath + "\n");
os.writeBytes("exit\n");

String strTmp = "";
while ((strTmp = bufferedReader.readLine()) != null) {
allList += strTmp + "<";
}
strItems = allList.split("<");

os.flush();
process.waitFor();
} catch (Exception e) {
return null;
} finally {
try {
if (os != null) {
os.close();
}
process.destroy();
} catch (Exception e) {
}
}
return strItems;
}
}

/**
* 应用程序运行命令获取 Root权限，设备必须已破解(获得ROOT权限)
* @return 应用程序是/否获取Root权限
*/
public static boolean upgradeRootPermission(String pkgCodePath) {
Process process = null;
DataOutputStream os = null;
try {
String cmd="chmod 777 " + pkgCodePath;
process = Runtime.getRuntime().exec("su"); //切换到root帐号
os = new DataOutputStream(process.getOutputStream());
os.writeBytes(cmd + "\n");
os.writeBytes("exit\n");
os.flush();
process.waitFor();
} catch (Exception e) {
return false;
} finally {
try {
if (os != null) {
os.close();
}
process.destroy();
} catch (Exception e) {
}
}
return true;
}