Android之普通对话框

main.xml布局文件

<?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="显示普通对话框" 
        android:id="@+id/button"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

AlertDialog类

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) {
                // 显示对话框
                showDialog(DIALOG);
            }
        });
    }
    
    /**
     * 创建普通对话框
     */
    @Override
    protected Dialog onCreateDialog(int id) {
        Dialog dialog=null;
        switch (id) {
        case DIALOG:
            Builder builder=new android.app.AlertDialog.Builder(this);
            //设置对话框的图标
            builder.setIcon(R.drawable.header);
            //设置对话框的标题
            builder.setTitle("普通对话框");
            //设置对话框的显示内容
            builder.setMessage("这是普通对话框中的内容！！");
            //添加按钮，android.content.DialogInterface.OnClickListener.OnClickListener
            builder.setPositiveButton(" 确 定 ", new OnClickListener(){
                public void onClick(DialogInterface dialog, int which) {
                    editText.setText("这是普通对话框中的内容！！");
                }
            });
            //创建一个普通对话框
            dialog=builder.create();
            break;
        }
        return dialog;
    }
    
}

运行结果