2018-09-03
cat file1 > file2 //读取/复制file1为file2
echo "string" > file //覆盖写入string到file
echo "string" >> file //追加写入string到file
//注意引号里面的内容string要replaceAll("\\n", "\\\\n")，replaceAll("\"", "\\\\\"");
下面是一个执行多条命令的方法
public static CommandResultexecCommand(String[] commands, boolean isRoot) {
CommandResult commandResult =new CommandResult();
if (commands ==null || commands.length ==0)return commandResult;
Process process =null;
DataOutputStream os =null;
BufferedReader successResult =null;
BufferedReader errorResult =null;
StringBuilder successMsg =null;
StringBuilder errorMsg =null;
try {
process = Runtime.getRuntime().exec(isRoot ?COMMAND_SU :COMMAND_SH);
os =new DataOutputStream(process.getOutputStream());
for (String command : commands) {
if (command !=null) {
os.write(command.getBytes());
os.writeBytes(COMMAND_LINE_END);
os.flush();
}
}
os.writeBytes(COMMAND_EXIT);
os.flush();
commandResult.result = process.waitFor();
//获取错误信息
successMsg =new StringBuilder();
errorMsg =new StringBuilder();
successResult =new BufferedReader(new InputStreamReader(process.getInputStream()));
errorResult =new BufferedReader(new InputStreamReader(process.getErrorStream()));
String s;
while ((s = successResult.readLine()) !=null) successMsg.append(s);
while ((s = errorResult.readLine()) !=null) errorMsg.append(s);
commandResult.successMsg = successMsg.toString();
commandResult.errorMsg = errorMsg.toString();
}catch (IOException e) {
String errmsg = e.getMessage();
if (errmsg !=null) {
Log.e(TAG, errmsg);
}else {
e.printStackTrace();
}
}catch (Exception e) {
String errmsg = e.getMessage();
if (errmsg !=null) {
Log.e(TAG, errmsg);
}else {
e.printStackTrace();
}
}finally {
try {
if (os !=null) os.close();
if (successResult !=null) successResult.close();
if (errorResult !=null) errorResult.close();
}catch (IOException e) {
String errmsg = e.getMessage();
if (errmsg !=null) {
Log.e(TAG, errmsg);
}else {
e.printStackTrace();
}
}
if (process !=null) process.destroy();
}
return commandResult;
}
修改Packages.xml文件权限
String path ="/storage/emulated/0/temp.xml";
CommandExecution.execCommand("cat /data/system/packages.xml > " + path, true);
File file =new File(path);
if (!file.exists()) {
Log.d("File", path +"不存在");
}else {
StringBuffer sb =new StringBuffer();
try {
InputStream is =new FileInputStream(file);
if (is !=null) {
InputStreamReader isr =new InputStreamReader(is);
BufferedReader br =new BufferedReader(isr);
String line;
while ((line = br.readLine()) !=null) {
sb.append(line);
sb.append("\n");
}
CommandExecution.execCommand("echo \"" +
sb.toString().replaceAll("granted=\"false\"", "granted=\"true\"")
.replaceAll("\\n", "\\\\n")
.replaceAll("\"", "\\\\\"") +
"\" > /data/system/packages.xml", true);
Log.i("setPermission", "Success");
}
}catch (FileNotFoundException e) {
Log.d("FileNotFoundException", file.getAbsolutePath() +" doesn't found\n" + e.getMessage());
}catch (IOException e) {
Log.d("File", "read exception: " + e.getMessage());
}
}
网友评论