ArrayAdapter使用

ArrayAdapter将數組中的每個元素綁定到布局資源中定義的簡單View控件。

1.定義textview.xml

<?xml version="1.0" encoding="utf-8"?>

<TextView

    xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:textSize="20sp" />

2.定義界面

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="@string/main_menu" 

        android:textSize="30sp"/>

    <ListView android:id="@android:id/list"

        android:layout_width="fill_parent"

        android:layout_height="0dip"

        android:layout_weight="1"

        android:drawSelectorOnTop="false"/>

</LinearLayout>

3.在代碼中加載資料源及點選事件

package com.introtoandroid.advancedlayouts;

import android.app.ListActivity;

import android.content.Intent;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.widget.ArrayAdapter;

import android.widget.ListView;

import android.widget.TextView;

public class MyListActivity extends ListActivity {

private String[] items= { "Basic Layout", 

"List Layout", 

"Grid View" };

@Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.menu_layout);

        setListAdapter(new ArrayAdapter<String>(this, R.layout.textview, items));

    }

@Override

protected void onListItemClick(ListView l, View v, int position, long id) {

Log.d (AdvancedLayoutsActivity.DEBUG_TAG, "pos: "+position + " , id: "+ id);

switch (position) {

case 0:

Intent intent = new Intent(this,

BasicLayoutActivity.class);

startActivity(intent);

break;

case 1:

TextView tv = (TextView) v;

tv.setText("Changed");

break;

case 2:

String original = (String) l

.getItemAtPosition(position);

Log.d(AdvancedLayoutsActivity.DEBUG_TAG, "original string: "

+ original);

((TextView) v).setText("Updated");

break;

}

}

}