Android[初级教程]第十章 AlertDialog控件

这次我们来学习AlertDialog控件,这次老妖怪们想了,不能让每个妖怪都能看到通辑令啊?得要有个认证权限啊,万一孙猴子变成小妖怪看到了多不好啊,呵呵,这次我们就用AlertDialog控件来做登录认证功能.先上图

还是来看main.xml

<?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">
    <TextView android:text="西游记各主人公通辑令" android:id="@+id/textView1"
        android:layout_width="wrap_content" android:layout_height="wrap_content"></TextView>
    <ListView android:id="@+id/listView" android:layout_height="wrap_content"
        android:layout_width="match_parent"></ListView>

    <TextView android:layout_height="wrap_content"
        android:layout_width="fill_parent" android:text="@string/hello"
        android:id="@+id/text"></TextView>
</LinearLayout>

很简单,里面就加了个ListView控件,为的是将师徙四人的名字显示出来

再创建一个login.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent" android:padding="10dp">
    <TextView android:text="账号" android:layout_width="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:layout_height="wrap_content" android:id="@+id/textView1"></TextView>
    <EditText android:id="@+id/user" android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <requestFocus></requestFocus>
    </EditText>
    <TextView android:text="密码" android:layout_width="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:layout_height="wrap_content" android:id="@+id/textView2"></TextView>
    <EditText android:id="@+id/pass" android:layout_width="match_parent"
        android:layout_height="wrap_content" android:inputType="textPassword"></EditText>

</LinearLayout>

这个界面是区配Dialog中的显示视图的

最后再创建一个image.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="wrap_content" android:weightSum="1">
    <ImageView android:id="@+id/imageView1" android:src="@drawable/bajie"
        android:layout_width="160dp" android:layout_gravity="center"
        android:scaleType="centerCrop" android:layout_height="155dp"></ImageView>
</LinearLayout>
OK,layout都创建好了,现在就主java代码了:

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class ButtonDemoActivity extends Activity
{
    private TextView text = null;
    private int[] image = { R.drawable.tangseng, R.drawable.wukong,
            R.drawable.bajie, R.drawable.shaseng };
    private String[] item = { "唐僧", "孙悟空 ", "猪八戒", "沙和尚" };
    private ListView listView;
    protected int position_int;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        // 通过ID查找到main.xml中的TextView控件
        text = (TextView) findViewById(R.id.text);

        // 通过ID查找到main.xml中的ListView控件
        listView = (ListView) findViewById(R.id.listView);

        // 设置ListView适配器
        ArrayAdapter adapter = new ArrayAdapter(this,
                android.R.layout.simple_list_item_1, item);

        listView.setAdapter(adapter);

        // 设置ListView单项选择监听器
        listView.setOnItemClickListener(new OnItemClickListener()
        {

            @Override

补充：移动开发 , Android ,