Android sub-thread UI Update Summary

Android sub-thread UI Update Summary

Package com. jrhcode. morethreadtest; import java. util. concurrent. executors; import android. OS. asyncTask; import android. OS. bundle; import android. OS. handler; import android. app. activity; import android. view. menu; import android. widget. textView; import android. widget. toast;/*** main function: to change the display content of TextView in a child thread ** android multi-thread programming 1: update the UI component handler in a newly started thread through Handler. post (new Runnable (); 2: handler. postdelayed (new Runnable, delay); 3: Activity. runOnUiThread (); 4: AsyncTask 5: thread pool ** @ author Administrator **/public class MainActivity extends Activity {TextView TV; private Handler mHandler; private String TAG = MainActivity. class. getSimpleName (); int I = 0; @ Overrideprotected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); TV = (TextView) findViewById (R. id. TV); mHandler = new Handler (); // initHandler (); // initHandler2 (); // initHandler3 (); // updateTv (); // updateTVV (); threedPool ();} private void threedPool () {// TODO Auto-generated method stubExecutors. newSingleThreadExecutor (). submit (new Runnable () {@ Overridepublic void run () {// TODO Auto-generated method stubSystem. out. println (Thread. currentThread (). getName (); TV. setText (TAG); mHandler. post (new Runnable () {@ Overridepublic void run () {// TODO Auto-generated method stubtv. setText ("this is handler post") ;}}}}) ;}/ *****/private void updateTVV () {// TODO Auto-generated method stubnew mytask(cmd.exe cute ();}/*** method 3 */private void updateTv () {// TODO Auto-generated method stubnew Thread (new Runnable () {@ Overridepublic void run () {// TODO Auto-generated method stubMainActivity. this. runOnUiThread (new Runnable () {@ Overridepublic void run () {// TODO Auto-generated method stubtv. setText (TAG );}});}}). start ();}/*** delay of 3 seconds */private void initHandler3 () {// TODO Auto-generated method stubnew Thread (new Runnable () {@ Overridepublic void run () {// TODO Auto-generated method stubmHandler. postDelayed (new Runnable () {@ Overridepublic void run () {// TODO Auto-generated method stubtv. setText (TAG) ;}}, 3000 );}}). start ();}/*** method in the Child Thread */private void initHandler2 () {// TODO Auto-generated method stubnew Thread (new Runnable () {@ Overridepublic void run () {// TODO Auto-generated method stubmHandler. post (new Runnable () {@ Overridepublic void run () {System. out. println (Thread. currentThread (). getName (); TV. setText (TAG );}});}}). start ();}/*** Mothod 1; this method operates the UI in the injection thread; */private void initHandler () {// TODO Auto-generated method stubmHandler. post (new Runnable () {@ Overridepublic void run () {Toast. makeText (MainActivity. this, Thread. currentThread (). getName (), 0 ). show (); TV. setText (TAG) ;}});} class MyTask extends AsyncTask
 
  
{@ Overrideprotected String doInBackground (String... params) {// TODO Auto-generated method stubtry {Thread. sleep (3000);} catch (InterruptedException e) {// TODO Auto-generated catch blocke. printStackTrace ();} return null;} @ Overrideprotected void onPostExecute (String result) {// TODO Auto-generated method stubsuper. onPostExecute (result); TV. setText (TAG );}}}