DialogFragment 的使用

package com.whj.ntwb;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

@SuppressLint("NewApi") public class MainActivity extends Activity{
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout_linearlayout);
         View tv = findViewById(R.id.text);
            ((TextView)tv).setText("Example of displaying an alert dialog with a DialogFragment");

            // Watch for button clicks.
            Button button = (Button)findViewById(R.id.show);
            button.setOnClickListener(new OnClickListener() {
                public void onClick(View v) {
                    showDialog();
                }
            });
    }

    void showDialog() {
        DialogFragment newFragment = MyAlertDialogFragment.newInstance(
                R.string.alert_dialog_two_buttons_title);
        newFragment.show(getFragmentManager(), "dialog");
    }

    public void doPositiveClick() {
        // Do stuff here.
        Log.i("FragmentAlertDialog", "Positive click!");
    }
    
    public void doNegativeClick() {
        // Do stuff here.
        Log.i("FragmentAlertDialog", "Negative click!");
    }

    

    public static class MyAlertDialogFragment extends DialogFragment {

        public static MyAlertDialogFragment newInstance(int title) {
            MyAlertDialogFragment frag = new MyAlertDialogFragment();
            Bundle args = new Bundle();
            args.putInt("title", title);
            frag.setArguments(args);
            return frag;
        }
        
        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            int title = getArguments().getInt("title");
            
            return new AlertDialog.Builder(getActivity())
                    .setIcon(R.drawable.ic_launcher)
                    .setTitle(title)
                    .setMessage("ddddddddddd")
                    .setPositiveButton(R.string.alert_dialog_ok,
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {
                                ((MainActivity)getActivity()).doPositiveClick();
                            }
                        }
                    )
                    .setNegativeButton(R.string.alert_dialog_cancel,
                        new DialogInterface.OnClickListener() {
                            public void onClick(DialogInterface dialog, int whichButton) {
                                ((MainActivity)getActivity()).doNegativeClick();
                            }
                        }
                    )
                    .create();
        }
    }
}