Countdown Android Example

Question

Any help for displaying this simple countdown on the progress bar?

new CountDownTimer(30000, 1000) { public void onTick(long millisUntilFinished) { mTextField.setText("seconds remaining: " + millisUntilFinished / 1000); } public void onFinish() { mTextField.setText("done!"); } }.start(); 

http://developer.android.com/reference/android/os/CountDownTimer.html

Answer 1

You can try this alternative method, I created it when I found out about the execution bar,

main.xml,

 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <Button android:text="@string/Button02Text" android:id="@+id/Button02" android:layout_width="fill_parent" android:layout_height="wrap_content"> </Button> </LinearLayout> 

Activities of the ProgressBar,

 public class ProgressBarExampleActivity extends Activity { ProgressThread progThread; ProgressDialog progDialog; Button button1, button2; int typeBar; // Determines type progress bar: 0 = spinner, 1 = horizontal int delay = 1000; // Milliseconds of delay in the update loop int maxBarValue = 30; // Maximum value of horizontal progress bar /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // Process button to start horizontal progress bar dialog with anonymous inner class button2 = (Button) findViewById(R.id.Button02); button2.setOnClickListener(new OnClickListener() { public void onClick(View v) { typeBar = 1; showDialog(typeBar); } }); } // Method to create a progress bar dialog of either spinner or horizontal type @Override protected Dialog onCreateDialog(int id) { switch(id) { case 1: // Horizontal progDialog = new ProgressDialog(this); progDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL); progDialog.setMax(maxBarValue); progDialog.setMessage("Dollars in checking account:"); progThread = new ProgressThread(handler); progThread.start(); return progDialog; default: return null; } } // Handler on the main (UI) thread that will receive messages from the // second thread and update the progress. final Handler handler = new Handler() { public void handleMessage(Message msg) { // Get the current value of the variable total from the message data // and update the progress bar. int total = msg.getData().getInt("total"); progDialog.setProgress(total); // if (total >= maxBarValue) if (total <= 0 ) { dismissDialog(typeBar); progThread.setState(ProgressThread.DONE); } } }; // Inner class that performs progress calculations on a second thread. Implement // the thread by subclassing Thread and overriding its run() method. Also provide // a setState(state) method to stop the thread gracefully. private class ProgressThread extends Thread { // Class constants defining state of the thread final static int DONE = 0; final static int RUNNING = 1; Handler mHandler; int mState; int total; // Constructor with an argument that specifies Handler on main thread // to which messages will be sent by this thread. ProgressThread(Handler h) { mHandler = h; } // Override the run() method that will be invoked automatically when // the Thread starts. Do the work required to update the progress bar on this // thread but send a message to the Handler on the main UI thread to actually // change the visual representation of the progress. In this example we count // the index total down to zero, so the horizontal progress bar will start full and // count down. @Override public void run() { mState = RUNNING; total = maxBarValue; while (mState == RUNNING) { // The method Thread.sleep throws an InterruptedException if Thread.interrupt() // were to be issued while thread is sleeping; the exception must be caught. try { // Control speed of update (but precision of delay not guaranteed) Thread.sleep(delay); } catch (InterruptedException e) { Log.e("ERROR", "Thread was Interrupted"); } // Send message (with current value of total as data) to Handler on UI thread // so that it can update the progress bar. Message msg = mHandler.obtainMessage(); Bundle b = new Bundle(); b.putInt("total", total); msg.setData(b); mHandler.sendMessage(msg); total--; // Count down } } // Set current state of thread (use state=ProgressThread.DONE to stop thread) public void setState(int state) { mState = state; } } }