应用获取Root权限的原理:让应用的代码执行目录获取最高权限。在Linux中通过chmod 777 [代码执行目录]
//请求root权限
public static boolean upgradeRootPermission(String pkgCodePath) {
Process process = null;
DataOutputStream os = null;
Boolean resBoolean;
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 + "
");
os.writeBytes("exit
"); //退出root 账号,不执行会卡住机器
os.flush();
resBoolean= process.waitFor()==0;
} catch (Exception e) {
return false;
} finally {
try {
if (os != null) {
os.close();
}
process.destroy();
} catch (Exception e) {
}
}
return resBoolean;
}
//调用函数
if(upgradeRootPermission(getPackageCodePath()))
{
Toast.makeText(MainActivity.this, "Root 权限请求成功", Toast.LENGTH_SHORT).show();
}
else{
Toast.makeText(MainActivity.this, "Root 权限请求失败,无法使用!程序将自动退出!", Toast.LENGTH_SHORT).show();
finish();
}