Activity中与ListActivity中使用listview区别
一.Activity中與ListActivity中使用listview區別(本身沒多大區別,只是ListActivity在listview的顯示上做了一些優化)
Activity中使用Listview步驟:
1.xml布局中,ListView標簽id可以任意取值如:
<ListViewandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:id="@+id/listview" />?
2.程序中通過findViewById獲取該Listview對象如:
ListView lv = (ListView)findViewById(R.id.listview);3.實例化Adapter
4.然后通過listView.setAdapter(adapter);? 設置adapter綁定數據如:
lv.setAdapter(adapter);ListActivity中使用Listview步驟:
1.xml布局中,ListView標簽id必須寫成android:id="@+id/android:list"如:
<ListViewandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:id="@+id/android:list" />2.實例化Adapter
3.然后通過setListAdapter(adapter);設置adapter綁定數據
setListAdapter(adapter);補充:程序中如果想獲取Listview對象,通過getListView()方法
ListView lv = getListView();上圖:
源碼目錄結構:
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完整源碼:
1>AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android"package="com.bravestarr.app.listview1"android:versionCode="1"android:versionName="1.0" ><uses-sdk android:minSdkVersion="7" /><applicationandroid:icon="@drawable/ic_launcher"android:label="@string/app_name" ><activityandroid:name=".MainActivity"android:label="@string/app_name" ><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><activityandroid:name=".ListViewInActivity"android:label="@string/app_name" ></activity><activityandroid:name="com.bravestarr.app.listview1.ListViewInListActivity"android:label="@string/app_name" ></activity></application></manifest>2>main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical" ><Button android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="@string/btn1"android:id="@+id/btn1"/><Button android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="@string/btn2"android:id="@+id/btn2"/> </LinearLayout>3>activity.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical" ><TextViewandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:text="@string/listview_in_activity" /><ListViewandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:id="@+id/listview" /> </LinearLayout>4>listactivity.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent"android:orientation="vertical" ><TextViewandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:text="@string/listview_in_listactivity" /><ListViewandroid:layout_width="fill_parent"android:layout_height="wrap_content"android:id="@+id/android:list" /> </LinearLayout>5>mylist_item.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="fill_parent" android:id="@+id/item"/>6>strings.xml
<?xml version="1.0" encoding="utf-8"?> <resources><string name="btn1">繼承自Activity的listview使用</string><string name="btn2">繼承自ListActivity的listview使用</string><string name="listview_in_activity">說明:Activity中使用Listview\nxml布局中,ListView標簽id可以任意取值,\n程序中通過findViewById找到該Listview對象,\n然后通過listView.setAdapter(adapter); 綁定設置adapter綁定數據</string><string name="listview_in_listactivity">說明:ListActivity中使用Listview\nxml布局中,ListView標簽id必須寫成android:id="@+id/android:list",\n程序中通過getListView()找到該Listview對象,\n然后通過setListAdapter(adapter);設置adapter綁定數據,無需得到listview</string><string name="app_name">ListView的使用</string> </resources>7>MainActivity.java
package com.bravestarr.app.listview1;import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button;/*** @Author BraveStarr* @QQ 1733259520* @Blog http://www.cnblogs.com/bravestarrhu/,http://blog.sina.com.cn/wanghubravestarr**/ public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);Button btn1,btn2;btn1 = (Button)findViewById(R.id.btn1);btn2 = (Button)findViewById(R.id.btn2);btn1.setOnClickListener(l);btn2.setOnClickListener(l);}private View.OnClickListener l = new View.OnClickListener() {Intent i;@Overridepublic void onClick(View v) {switch(v.getId()){case R.id.btn1:i = new Intent(MainActivity.this,ListViewInActivity.class);startActivity(i);break;case R.id.btn2:i = new Intent(MainActivity.this,ListViewInListActivity.class);startActivity(i);break;}}}; }8>ListViewInActivity.java
package com.bravestarr.app.listview1;import android.app.Activity; import android.os.Bundle; import android.widget.ArrayAdapter; import android.widget.ListView;public class ListViewInActivity extends Activity {private static final String[] names = new String[]{"斗破蒼穹","網游之終極牧師","琴帝"};@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity);ListView lv = (ListView)findViewById(R.id.listview);ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.mylist_item, names);lv.setAdapter(adapter);} }9>ListViewInListActivity.java
package com.bravestarr.app.listview1;import android.app.ListActivity; import android.os.Bundle; import android.widget.ArrayAdapter;/*** @Author BraveStarr* @QQ 1733259520* @Blog http://www.cnblogs.com/bravestarrhu/,http://blog.sina.com.cn/wanghubravestarr**/ public class ListViewInListActivity extends ListActivity {private static final String[] names = new String[]{"斗破蒼穹","網游之終極牧師","琴帝"};@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.listactivity);ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.mylist_item, names);setListAdapter(adapter);}}總結
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