我有一个expandablelistview,如下所示。我已经做到这一点,以便在点击每个孩子时弹出一个Toast消息。我需要每个孩子开始他们自己的活动/片段,这需要单独的onClick()方法。有谁知道如何实现这一目标?谢谢。注意:我使用的是SimonVT的slidemenu库,我对android编程很新。
MainActivity.java:
package press.linx.expandablelistdemo;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.xml.sax.SAXException;
import net.simonvt.menudrawer.MenuDrawer;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.SimpleAdapter;
import android.widget.Toast;
public class MainActivity extends Activity {
ExpandableListView exv;
MenuDrawer mDrawer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mDrawer = MenuDrawer.attach(this);
mDrawer.setContentView(R.layout.activity_main);
mDrawer.setMenuView(R.layout.leftmenu);
exv=(ExpandableListView)findViewById(R.id.expandableListView1);
exv.setAdapter(new MyAdapter(this));
exv.setOnChildClickListener(new OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v,
int groupPosition, int childPosition, long id) {
// TODO Auto-generated method stub
String itemclicked = MyAdapter.childList[groupPosition][childPosition];
Toast.makeText(getApplicationContext(), "you clicked " + itemclicked, Toast.LENGTH_SHORT).show();
return false;
}
});
}
private void setListAdapter(SimpleAdapter adapter) {
// TODO Auto-generated method stub
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
MyAdapter.java
package press.linx.expandablelistdemo;
import android.content.Context;
import android.graphics.Color;
import android.graphics.Typeface;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.TextView;
public class MyAdapter extends BaseExpandableListAdapter {
private Context context;
Typeface typeface;
String []parentList = {"Tech", "Best Of", "Art & Design", "Other"};
static String [][] childList = {
{
"All Tech", "Reviews", "Gaming", "Gadgets"
},
{
"Android"
},
{
"Architecture"
},
{
"Infographics"
}
};
public MyAdapter(Context context) {
// TODO Auto-generated constructor stub
this.context=context;
}
@Override
public Object getChild(int arg0, int arg1) {
// TODO Auto-generated method stub
return null;
}
@Override
public long getChildId(int arg0, int arg1) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView,
ViewGroup parent) {
// TODO Auto-generated method stub
//typeface = Typeface.createFromAsset(context.getAssets(), "font/robotochild.ttf");
TextView tv = new TextView(context);
tv.setText(childList[groupPosition][childPosition]);
tv.setPadding(30, 10, 0, 10);
tv.setTextSize(15);
//tv.setTypeface(typeface);
tv.setTextColor(Color.WHITE);
return tv;
}
@Override
public int getChildrenCount(int groupPosition) {
// TODO Auto-generated method stub
return childList[groupPosition].length;
}
@Override
public Object getGroup(int groupPosition) {
// TODO Auto-generated method stub
return groupPosition;
}
@Override
public int getGroupCount() {
// TODO Auto-generated method stub
return parentList.length;
}
@Override
public long getGroupId(int groupPosition) {
// TODO Auto-generated method stub
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
TextView tv = new TextView(context);
typeface = Typeface.createFromAsset(context.getAssets(), "font/roboto.ttf");
tv.setText(parentList[groupPosition]);
tv.setPadding(50, 10, 0, 10);
tv.setTextSize(20);
tv.setTextColor(Color.WHITE);
tv.setTypeface(typeface);
return tv;
}
@Override
public boolean hasStableIds() {
// TODO Auto-generated method stub
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return true;
}
}
menulistview.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity"
android:background="@drawable/geowall">
<ExpandableListView
android:id="@+id/expandableListView1"
android:groupIndicator="@null"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:padding="3dp" >
</ExpandableListView>
!
答案 0 :(得分:0)
如果您希望每个按钮具有不同的功能,请考虑将它们存储为按钮“tag
属性(在XML布局中)”。 View v
监听器中的onChildClick
参数是被点击的孩子的View
;然后可以使用它来检索标记,如下所示:
v.getTag();
你可以有一个switch-case块来根据标记调用正确的活动,或者在标记中存储活动的完全名称,并通过反射传递它以检索类为了活动。或者,您可以将标记名称HashMap
映射到Activity
类/变量。
答案 1 :(得分:0)
这可能是你在找。
让我们开始在Eclipse IDE中创建一个项目。
public class AndroidListViewActivity扩展ListActivity { 3.现在我们需要一个字符串资源文件来存储所有列表项标签。因此,在values文件夹下创建一个XML文件,并将其命名为list_data.xml并粘贴以下代码。 (右键单击res /values⇒新的⇒AndroidXML文件)
list_data.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string-array name="adobe_products">
<item>Adobe After Effects</item>
<item>Adobe Bridge</item>
<item>Adobe Dreamweaver</item>
<item>Adobe Edge</item>
<item>Adobe Fireworks</item>
<item>Adobe Flash</item>
<item>Adobe Photoshop</item>
<item>Adobe Premiere</item>
<item>Adobe Reader</item>
<item>Adobe Illustrator</item>
</string-array>
</resources>
在ListView中,每个列表项都是一个xml布局,因此我们可以自定义每个列表项。在res / layout文件夹下创建一个XML文件,并将其命名为list_item.xml并键入以下代码。此xml布局将是单个列表项行。 (右键单击res /layout⇒New⇒AndroidXML File)
现在打开主活动java文件(AndroidListViewActivity.java)并输入以下代码。在下面的代码中,我将导入所有xml资源数据并将它们存储在Array中。在下一步,我将数组绑定到ListAdapter。
AndroidListViewActivity.java
package com.androidhive.androidlistview;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class AndroidListViewActivity extends ListActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// storing string resources into Array
String[] adobe_products = getResources().getStringArray(R.array.adobe_products);
// Binding resources Array to ListAdapter
this.setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item, R.id.label, adobe_products));
}
}
在选择单个列表项时启动新活动 在我之前的文章中,我已经解释了如何在屏幕之间切换。在这里,我将在新屏幕中显示单个列表项详细信息。
AndroidListViewActivity.java
package com.androidhive.androidlistview;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
public class AndroidListViewActivity extends ListActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// storing string resources into Array
String[] adobe_products = getResources().getStringArray(R.array.adobe_products);
// Binding resources Array to ListAdapter
this.setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item, R.id.label, adobe_products));
ListView lv = getListView();
// listening to single list item on click
lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// selected item
String product = ((TextView) view).getText().toString();
// Launching new Activity on selecting single List Item
Intent i = new Intent(getApplicationContext(), SingleListItem.class);
// sending data to new activity
i.putExtra("product", product);
startActivity(i);
}
});
}
}
现在,在新活动中,我们需要显示从listview活动收到的内容。
single_list_item_view.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">
<TextView android:id="@+id/product_label"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="25dip"
android:textStyle="bold"
android:padding="10dip"
android:textColor="#ffffff"/>
</LinearLayout>
SingleListItem.java
package com.androidhive.androidlistview;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.TextView;
public class SingleListItem extends Activity{
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.setContentView(R.layout.single_list_item_view);
TextView txtProduct = (TextView) findViewById(R.id.product_label);
Intent i = getIntent();
// getting attached intent data
String product = i.getStringExtra("product");
// displaying selected product name
txtProduct.setText(product);
}
}
的AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.androidhive.androidlistview"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="8" />
<application android:icon="@drawable/icon" android:label="@string/app_name">
<activity android:name=".AndroidListViewActivity"
android:label="Android List View">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".SingleListItem"
android:label="Single Item Selected"></activity>
</application>
</manifest>