Android(安卓)AlertDialog example

package com.cjp.alertdialog;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class AlertDialogDemoActivity extends Activity {
final Context context = this;
private Button button;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
setContentView(R.layout.main);

button = (Button) findViewById(R.id.buttonAlert);

// add button listener
button.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View arg0) {

AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
context);

// set title
alertDialogBuilder.setTitle("Your Title");

// set dialog message
alertDialogBuilder
.setMessage("Click yes to exit!")
.setCancelable(false)
.setPositiveButton("Yes",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, close
// current activity
AlertDialogDemoActivity.this.finish();
}
})
.setNegativeButton("No",new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,int id) {
// if this button is clicked, just close
// the dialog box and do nothing
dialog.cancel();
}
});

// create alert dialog
AlertDialog alertDialog = alertDialogBuilder.create();

// show it
alertDialog.show();
}
});
}

}

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