Android實現“是否退出”對話方塊和“帶表徵圖的列表”對話方塊

標籤：

今天我們學習的內容是實現兩種對話方塊(Dialog)，第一種是詢問是否退出對話方塊，另外一種是帶表徵圖的列表對話方塊，程式的執行效果是，我們點擊button1的時候，彈出第一種對話方塊，我們點擊button2的時候，彈出另外一種對話方塊。

(1)  首先是布局方面，有三個xml檔案，一個是Activity的布局檔案，一個是Dialog的布局檔案，一個是ListView的布局檔案，內容分別例如以下：

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="fill_parent"    android:layout_height="fill_parent"     android:orientation="vertical">    <Button android:id="@+id/exit_button"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:layout_gravity="center"       android:text="對話方塊1"/>        <Button android:id="@+id/list_button"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:layout_gravity="center"       android:text="對話方塊2"/></LinearLayout>

dialog_list.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical" >    <ListView        android:id="@+id/listview"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:cacheColorHint="#00000000" >    </ListView></LinearLayout>

items.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="horizontal" >    <ImageView        android:id="@+id/image"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:adjustViewBounds="true"        android:maxHeight="72px"        android:maxWidth="72px"        android:paddingBottom="20px"        android:paddingLeft="10px"        android:paddingTop="20px" />    <TextView        android:id="@+id/title"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center"        android:padding="10px" /></LinearLayout>

(2)然後就Java代碼部分，代碼部分關於dialog我已經具體凝視，具體請看：

package com.example.dialogdemo;import java.util.ArrayList;import java.util.HashMap;import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.os.Bundle;import android.view.LayoutInflater;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Button;import android.widget.ImageView;import android.widget.ListView;import android.widget.TextView;public class MainActivity extends Activity {//定義兩個靜態字串private static final String DIALOG_ICON = "icon";private static final String DIALOG_TITLE = "title";//聲明Button類型的變數button1private Button button1;//聲明Button類型的變數button2private Button button2;//聲明View類型的變數viewprivate View view;//聲明ListView類型的變數listViewprivate ListView listView;//聲明一個ArrayList變數mList，它裡面的item都是HashMap類型private ArrayList<HashMap<String, Object>> mList;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                initData();        setupViews();    }        /**     * 初始化資料     */    private void initData(){    //初始化mList    if(mList == null){    mList = new ArrayList<HashMap<String,Object>>();    }else{    mList.clear();    }        //向mList裡面加入資料    HashMap<String, Object> map  = new HashMap<String, Object>();    map.put(DIALOG_ICON, R.drawable.img01);    map.put(DIALOG_TITLE, "程式管理");    mList.add(map);        map = new HashMap<String, Object>();    map.put(DIALOG_ICON, R.drawable.img02);    map.put(DIALOG_TITLE, "保密設定");    mList.add(map);        map = new HashMap<String, Object>();    map.put(DIALOG_ICON, R.drawable.img03);    map.put(DIALOG_TITLE, "安全設定");    mList.add(map);        map = new HashMap<String, Object>();    map.put(DIALOG_ICON, R.drawable.img04);    map.put(DIALOG_TITLE, "郵件設定");    mList.add(map);        map = new HashMap<String, Object>();    map.put(DIALOG_ICON, R.drawable.img05);    map.put(DIALOG_TITLE, "鈴聲設定");    mList.add(map);    }        /**     * 初始化視圖     */    private void setupViews(){    LayoutInflater inflater = LayoutInflater.from(MainActivity.this);view = inflater.inflate(R.layout.dialog_list, null);listView = (ListView) view.findViewById(R.id.listview);DialogListViewAdapter adapter = new DialogListViewAdapter();listView.setAdapter(adapter);        //通過findviewbyid()擷取Button對象    button1 = (Button) findViewById(R.id.exit_button);    button2 = (Button) findViewById(R.id.list_button);        //為button1設定點擊監聽器    button1.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {//初始化一個AlertDialog對象AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create();//為dialog設定表徵圖alertDialog.setIcon(getResources().getDrawable(R.drawable.advise));//為dialog設定標題alertDialog.setTitle("退出？");//為dialog設定主體內容alertDialog.setMessage("是否真的要退出當前應用？");//為dialog設定一個按鈕alertDialog.setButton(DialogInterface.BUTTON_NEGATIVE, "不退出", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stub}});//為dialog設定還有一個按鈕alertDialog.setButton(DialogInterface.BUTTON_POSITIVE, "是的", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubMainActivity.this.finish();}});//顯示dialogalertDialog.show();}});        //為button2設定點擊監聽器    button2.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {//初始化一個AlertDialogAlertDialog alertDialog = new  AlertDialog.Builder(MainActivity.this).create();//為alertDialog設定視圖alertDialog.setView(view);//顯示alertDialogalertDialog.show();}});    }        /**     *定義ListView的Adapter，其作用是為ListView視圖提供資料     */    class DialogListViewAdapter extends BaseAdapter{@Overridepublic int getCount() {return mList.size();}@Overridepublic Object getItem(int position) {return mList.get(position);}@Overridepublic long getItemId(int position) {return position;}@Overridepublic View getView(int position, View convertView, ViewGroup parent) {ListViewItemHolder holder;if(convertView == null){convertView = LayoutInflater.from(MainActivity.this).inflate(R.layout.items, null);holder = new ListViewItemHolder();holder.imageView = (ImageView) convertView.findViewById(R.id.image);holder.textView = (TextView) convertView.findViewById(R.id.title);convertView.setTag(holder);}else{holder = (ListViewItemHolder) convertView.getTag();}HashMap<String, Object> map = mList.get(position);int iconId = (Integer) map.get(DIALOG_ICON);String title = (String) map.get(DIALOG_TITLE);holder.imageView.setImageResource(iconId);holder.textView.setText(title);return convertView;}        }        //兩個視圖控制項的一個封裝類    class ListViewItemHolder{    ImageView imageView;    TextView textView;    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.activity_main, menu);        return true;    }}

(3)執行一下android project，例如以下：

最後附上原始碼：

Android對話方塊(dialog)執行個體

Android實現“是否退出”對話方塊和“帶表徵圖的列表”對話方塊