MyDialogDemo.java:
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
public class MyDialogDemo extends Activity {
private Button mybut = null ; // 定义按钮
private TextView mych = null ; // 定义文本
private TextView mytext = null ; // 定义文本
private String fruitData [] = new String[] { "苹果", "西瓜", "水蜜桃" };
private String fruitDesc [] = new String[] {
"苹果,植物类水果,多次花果,具有丰富的营养成分,有食疗、辅助治疗等功能。",
"西瓜(学名:Citrullus Lanatus,英文:Watermelon),属葫芦科,原产于非洲。",
"水蜜桃,在植物分类学上属于蔷薇科,梅属,桃亚属,为落叶小乔木。"} ;
private int chNum = 0 ; // 保存选项
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
super.setContentView(R.layout.main); // 调用布局管理器
this.mybut = (Button) super.findViewById(R.id.mybut) ; // 取得按钮
this.mych = (TextView) super.findViewById(R.id.mych) ; // 取得文本
this.mytext = (TextView) super.findViewById(R.id.mytext) ; // 取得文本
this.mybut.setOnClickListener(new OnClickListenerImpl()) ; // 设置事件类
}
private class OnClickListenerImpl implements OnClickListener {
@Override
public void onClick(View view) {
Dialog dialog = new AlertDialog.Builder(MyDialogDemo.this)
.setIcon(R.drawable.pic_m)
.setTitle("请选择你喜欢吃的水果?")
.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
MyDialogDemo.this.mych
.setText(MyDialogDemo.this.fruitData[MyDialogDemo.this.chNum]); // 设置选项的名称
}
})
.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
}
}).setSingleChoiceItems(MyDialogDemo.this.fruitData, 0, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
MyDialogDemo.this.mytext
.setText(MyDialogDemo.this.fruitDesc[which]);
MyDialogDemo.this.chNum = which ; // 保存选项的索引
}
}).create() ;
dialog.show() ;
}
}
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:id="@+id/mych"
android:text=""
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/mytext"
android:text=""
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<Button
android:id="@+id/mybut"
android:text="选择水果"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>