Error In Thread And not Showing my toast

Question

I am new here to Android. My application is crashing with errors after sleep runs (5000) and then my toast is not showing in my finally block. What is causing these errors in my code?

public class LoginActivity extends ActionBarActivity {

TextView textview;
Toast toast;

@Override
protected void onCreate(Bundle ThisisLoginActivity) {
    super.onCreate(ThisisLoginActivity);
    setContentView(R.layout.activity_login);

    textview = (TextView) findViewById(R.id.textView1);

    Thread thread = new Thread() {
        public void run() {
            try{
                sleep(5000);
            } catch(InterruptedException e) {
                e.printStackTrace();
            }
            finally {
                toast = Toast.makeText(getApplicationContext(), "Sleep Runing", Toast.LENGTH_SHORT);
                toast.show();
            }
        }
    };
    thread.start();
}
}

Here is my LogCat:

01-08 22:30:32.782: E/Trace(3503): error opening trace file: No such file or directory (2)
01-08 22:30:33.322: I/Choreographer(3503): Skipped 47 frames!  The application may be doing too                     much work on its main thread.
01-08 22:30:33.402: D/gralloc_goldfish(3503): Emulator without GPU emulation detected.
01-08 22:30:33.531: I/Choreographer(3503): Skipped 62 frames!  The application may be doing too      much work on its main thread.
01-08 22:30:39.122: I/Choreographer(3503): Skipped 31 frames!  The application may be doing too much work on its main thread.
01-08 22:30:39.272: I/Choreographer(3503): Skipped 43 frames!  The application may be doing too much work on its main thread.
01-08 22:30:45.772: W/dalvikvm(3503): threadid=11: thread exiting with uncaught exception (group=0x40a71930)
01-08 22:30:45.792: E/AndroidRuntime(3503): FATAL EXCEPTION: Thread-153
01-08 22:30:45.792: E/AndroidRuntime(3503): java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
01-08 22:30:45.792: E/AndroidRuntime(3503):     at android.os.Handler.<init>(Handler.java:197)
01-08 22:30:45.792: E/AndroidRuntime(3503):     at android.os.Handler.<init>(Handler.java:111)
01-08 22:30:45.792: E/AndroidRuntime(3503):     at android.widget.Toast$TN.<init>(Toast.java:324)
01-08 22:30:45.792: E/AndroidRuntime(3503):     at android.widget.Toast.<init>(Toast.java:91)
01-08 22:30:45.792: E/AndroidRuntime(3503):     at android.widget.Toast.makeText(Toast.java:238)
01-08 22:30:45.792: E/AndroidRuntime(3503):     at com.example.incrementdecrement.LoginActivity$1.run(LoginActivity.java:48)
01-08 22:30:46.462: I/Choreographer(3503): Skipped 34 frames!  The application may be doing too much work on its main thread.

score 1 · Answer 1 · edited May 23 '17 at 10:30

1

You cannot directly manipulate the user interface from another thread. The main thread is responsible for all UI changes.

For a solution to a similiar problem see: Android: Toast in a thread

edited May 23 '17 at 10:30

Community

1
1

answered Jan 08 '15 at 22:29

Bastis Programming Corner

447
2
5

score 0 · Answer 2 · answered Mar 23 '17 at 20:04

0

Just use Activity's runOnUiThread method from your thread:

runOnUiThread(new Runnable() {
    public void run()
    {
        Toast.makeText(LoginActivity.this, "Sleep Runing", Toast.LENGTH_SHORT).show();
    }
});

answered Mar 23 '17 at 20:04

Ferdous Ahamed

21,438
5
52
61

score 0 · Answer 3 · answered Sep 28 '22 at 03:52

Method in onCreate :

private void toastPublic(final String message){
    Handler handler = new Handler(Looper.getMainLooper());
    handler.post(new Runnable() {
       public void run() {
          Toast.makeText(getBaseContext(),""+message, 
             4 /*Toast.LENGTH_SHORT*/).show();
    }});
}

Next : use in inside Thread

Error In Thread And not Showing my toast

3 Answers3