How to obtain root permissions for Android applications (basic)

To use the root permission in an Android Application, the device that runs the program must have the root permission.

　　public static boolean runRootCommand（String command） {　　Process process = null；　　DataOutputStream os = null；　　try {　　process = Runtime.getRuntime（）.exec（"su"）；　　os = new DataOutputStream（process.getOutputStream（））；　　os.writeBytes（command+"\n"）；　　os.writeBytes（"exit\n"）；　　os.flush（）；　　process.waitFor（）；　　} catch （Exception e） {　　Log.d（TAG， "the device is not rooted， error message： " + e.getMessage（））；　　return false；　　} finally {　　try {　　if （os ！= null） {　　os.close（）；　　}　　if（process ！= null） {　　process.destroy（）；　　}　　} catch （Exception e） {　　e.printStackTrace（）；　　}　　}　　return true；　　}

If the device has the root permission, the user will be prompted to authorize when the program executes the su command,

 

 

To write a small program, you need to obtain the root permission. After searching for it online for a long time, we found that this method is feasible,The device must have been cracked! Able to execute the su command.
1. Create a method: the code is as follows:

Package CN. ycmoon. utility; import Java. io. dataoutputstream; import android. app. activity; import android. util. log; public class systemmanager extends activity {/*** the application program run command to obtain the root permission. The device must have cracked (get the root permission) * @ Param command: string apkroot = "chmod 777" + getpackagecodepath (); rootcommand (apkroot); * @ return application Yes/No get root permission */public static Boolean rootcommand (string command) {Process = NULL; dataout Putstream OS = NULL; try {process = runtime.getruntime(cmd.exe C ("Su"); OS = new dataoutputstream (process. getoutputstream (); OS. writebytes (command + "\ n"); OS. writebytes ("Exit \ n"); OS. flush (); process. waitfor ();} catch (exception e) {log. D ("*** debug ***", "root REE" + E. getmessage (); Return false;} finally {try {If (OS! = NULL) {OS. close ();} process. destroy ();} catch (exception e) {}} log. D ("*** debug ***", "root suc"); Return true ;}}

2. In the mainactivity method of the application: 2. In the mainactivity method of the application:

 

public class MainActivity extends Activity{    public void onCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        String apkRoot="chmod 777 "+getPackageCodePath();        SystemManager.RootCommand(apkRoot);    }}

 

In this way, when the application is running, the message dialog box "the application has obtained the root permission" appears"