活动尚未开始

Question

Please have a look at the following code

Form.java

My main activity is Form.java. Inside that, I have an AlertDialog . When the user clicks on the "yes" button, the following class will be called

private class PositiveDialogBtnAction implements DialogInterface.OnClickListener
    {

        public PositiveDialogBtnAction()
        {
        }  
        @Override
        public void onClick(DialogInterface arg0, int arg1) {
            // TODO Auto-generated method stub
            //Toast.makeText(getApplicationContext(), databaseConnector.getStreetAddress(selectedBranch), Toast.LENGTH_LONG).show();

            Dialog dialog = new Dialog(context);
            dialog.setContentView(R.layout.activity_call_dialog);
            dialog.setTitle("Select a Phone Number");

            dialog.show();
        }

    }

Following are the XML file and the Java class, which is being set to a Dialog inside PositiveDialogBtnAction class mentioned above.

activity_call_dialog

<TextView
    android:id="@+id/callNumber1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:text="" />

<TextView
    android:id="@+id/callNumber2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerHorizontal="true"
    android:layout_centerVertical="true"
    android:text="" />

CallDialog.java

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.TextView;
import android.widget.Toast;

public class CallDialog extends Activity {

    private DatabaseConnector database = DatabaseHandler.getInstance();
    private TextView ph1,ph2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_call_dialog);

        Toast.makeText(this, "Activity Running", Toast.LENGTH_LONG).show();
        //String selectedBranch = Form.selectedBranch;

        //ph1 = (TextView)findViewById(R.id.callNumber1);
        //ph2 = (TextView)findViewById(R.id.callNumber2);

        //ph1.setText(database.getPhoneNumber1(selectedBranch));
        //ph2.setText(database.getPhoneNumber2(selectedBranch));

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_call_dialog, menu);
        return true;
    }


}

But, when the PositiveDialogBtnAction is fired, The Toast mentioned in CallDialog.java never get fired. It seems like it is not dealing with CallDIalog.java. Because of that, I am unable to set the values to the text fields in activity_call_dialog.xml as well. I have commented out those lines.

Why this Java file bundled with this activity is not getting called? Please help!

Answer 1

For creating the alert dialog you should use the AlertDialog.Builder. It has a beautiful fluent interface that makes it really easy to handle dialogs. Example:

new AlertDialog.Builder(this)
    .setMessage("Someone is calling you")
    .setPositiveButton("Positive", 
            new OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    startActivity(new Intent("com.example.CallDialogActivity"));
            }})
    .create()
    .show();

In order to start a new activity from inside the click listener, simply call startActivity() with the action registered in the AndroidManifest.xml for you CallDialog (I suggest you rename it to CallDialogActivity ). But anyway, you should determine where you use dialogs or activities. They have to be handled accordingly.