Showing ProgressDialog while a Service is being started

android, progressdialog, service

Solution

The problem is that you are not running ProgressDialog in a UI thread.

Add a handler that will handle messages in your UI thread.

private static final int UPDATE_STARTED = 0;
private static final int UPDATE_FINISHED = 1;

private Handler handler = new Handler(){
  @Override public void handleMessage(Message msg) {
    switch (msg.what) {
     case UPDATE_STARTED:
       progressDialog = ProgressDialog.show(ConnectActivity.this, "",
            "Loading. Please wait...", true, false);                
     break;  
     case UPDATE_FINISHED:
       if(progressDialog.isShowing()){
         progressDialog.dismiss();    
       }            
     break;
    }
  }
};


private void processThread() {
  Message m = new Message();
  m.what = UPDATE_STARTED;
  handler.sendMessage(m);

  //Your working code

  m = new Message();
  m.what = UPDATE_FINISHED;
  handler.sendMessage(m);
}

good luck!

Problem

I'm having serious problems when showing a ProgressDialog while a service is getting ready... The service takes time to get ready as it's a bit heavy, so I want to show the ProgressDialog meanwhile it's started. The thing is that it shows the ProgressDialog right before the next activity starts... I really don't find what it is... ``` package org.pfc; import android.app.Activity; import android.app.ProgressDialog; import android.content.BroadcastReceiver; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.ServiceConnection; import android.os.Bundle; import android.os.IBinder; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; public class ConnectActivity extends Activity { // FIELDS------------------------------------------------------------------ protected LocalService mSmeppService; private ProgressDialog progressDialog; private Thread tt; private ServiceConnection mConnection = new ServiceConnection() { public void onServiceConnected(ComponentName className, IBinder service) { // Gets the object to interact with the service mSmeppService = ((LocalService.LocalBinder) service).getService(); } public void onServiceDisconnected(ComponentName className) { // This is called when the connection with the service has been // unexpectedly disconnected -- that is, its process crashed. // Because it is running in our same process, we should never // see this happen. mSmeppService = null; } }; // For getting confirmation from the service private BroadcastReceiver serviceReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { Log.i(TAG, "receiver onReceive..."); if (progressDialog.isShowing()) progressDialog.dismiss(); // Change activity Intent groupsActivityIntent = new Intent(ConnectActivity.this, GroupsActivity.class); startActivity(groupsActivityIntent); } }; // METHODS ---------------------------------------------------------------- @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (LocalService.isRunning) { // TODO start ListActivity Log.i(TAG, "Starting GroupsScreen"); Intent i = new Intent(ConnectActivity.this, GroupsActivity.class); startActivity(i); } else { setContentView(R.layout.connect_screen); // Add listener to the button Button buttonConnect = (Button) findViewById(R.id.button_connect); buttonConnect.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { processThread(); } }); } } // PRIVATE METHODS -------------------------------------------------------- private void processThread() { progressDialog = ProgressDialog.show(ConnectActivity.this, "", "Loading. Please wait...", true, false); tt = new Thread() { public void run() { // Register broadcastReceiver to know when the service finished // its creation ConnectActivity.this.registerReceiver(serviceReceiver, new IntentFilter(Intent.ACTION_VIEW)); // Starts the service startService(new Intent(ConnectActivity.this, LocalService.class)); Log.i(TAG, "Receiver registered..."); } }; tt.start(); } } ``` The service executes by the end of the onStart method this: ``` // Send broadcast so activities take it Intent i = new Intent(Intent.ACTION_VIEW); sendOrderedBroadcast(i, null); ``` So the onReceive method runs and we go to the next activity

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