Android之普通對話方塊

main.xml布局檔案

<?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">
<EditText android:text="" 
        android:id="@+id/editText"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" 
        android:editable="false"
        android:cursorVisible="false" />
<Button android:text="顯示普通對話方塊" 
        android:id="@+id/button"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

AlertDialog類

package com.ljq.dialog;

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

public class AlertDialog extends Activity {
private EditText editText;
private final static int DIALOG=1;

    @Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        editText=(EditText)findViewById(R.id.editText);
        Button button = (Button) findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// 顯示對話方塊
                showDialog(DIALOG);
            }
        });
    }

/**
     * 建立普通對話方塊
*/
    @Override
protected Dialog onCreateDialog(int id) {
        Dialog dialog=null;
switch (id) {
case DIALOG:
            Builder builder=new android.app.AlertDialog.Builder(this);
//設定對話方塊的表徵圖
            builder.setIcon(R.drawable.header);
//設定對話方塊的標題
            builder.setTitle("普通對話方塊");
//設定對話方塊的顯示內容
            builder.setMessage("這是普通對話方塊中的內容！！");
//添加按鈕，android.content.DialogInterface.OnClickListener.OnClickListener
            builder.setPositiveButton(" 確 定 ", new OnClickListener(){
public void onClick(DialogInterface dialog, int which) {
                    editText.setText("這是普通對話方塊中的內容！！");
                }
            });
//建立一個普通對話方塊
            dialog=builder.create();
break;
        }
return dialog;
    }

}

運行結果