SlidingPaneLayout的基本使用
SlidingPaneLayout是V4包中新添加的组件,可以实现两列面板的切换。说先来看看API文档的说明:
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SlidingPaneLayout provides a horizontal, multi-pane layout for use at the top level of a UI. A left (or first) pane is treated as a content list or browser, subordinate to a primary detail view for displaying content. |
SlidingPanelLayout为在UI最上层的使用提供了一个水平的,多个面板的布局。左边的面板可以看作是一个内容列表或者是浏览,右边的面板的任务是显示详细的内容。
SlidingPaneLayout类也是直接继承于ViewGroup类,所以这个类也是当作容器类使用,在使用时通常可以和Fragement组件一起使用。下面是一个xiaoDemo,左边是网站url,右边显示网站。
首先是各个布局文件:
主布局文件actvity_main.xml:
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< android.support.v4.widget.SlidingPaneLayout xmlns:android = "http://schemas.android.com/apk/res/android" xmlns:tools = "http://schemas.android.com/tools" android:id = "@+id/slidingpanellayout" android:layout_width = "match_parent" android:layout_height = "match_parent" tools:context = ".MainActivity" > < fragment android:id = "@+id/leftfragment" android:name = "com.example.android_slidingpanellayout1.BookMarkerFragment" android:layout_width = "100dp" android:layout_height = "match_parent" android:layout_gravity = "left" /> < fragment android:id = "@+id/rightfragment" android:name = "com.example.android_slidingpanellayout1.ShowFragment" android:layout_width = "match_parent" android:layout_height = "match_parent" android:layout_gravity = "right" android:layout_weight = "1" /> </ android.support.v4.widget.SlidingPaneLayout > |
标签页使用的布局文件(bookmarker.xml)
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<? 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 = "match_parent" android:layout_height = "match_parent" /> </ LinearLayout > |
内容页使用的布局文件(show.xml)
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<? 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" > < WebView android:id = "@+id/webview" android:layout_width = "match_parent" android:layout_height = "match_parent" /> </ LinearLayout > |
标签页中listview使用的布局文件(mytext.xml):
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<? 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" > < TextView android:id = "@+id/text" android:layout_width = "match_parent" android:layout_height = "40dp" android:gravity = "center" android:textAlignment = "center" /> </ LinearLayout > |
标签页的Fragment(BookMarkerFragement.java)
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package com.example.android_slidingpanellayout1; import java.util.ArrayList; import java.util.List; import android.app.Activity; import android.app.Fragment; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.view.ViewGroup.LayoutParams; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.ImageView; import android.widget.ListView; public class BookMarkerFragment extends Fragment { public interface BookmarkListener { public void onChangeBookmark(String bookmark); } public BookmarkListener myActionObject = null ; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.bookmarker, container, false ); initListView(view); return view; } @Override public void onAttach(Activity activity) { if (!(activity instanceof BookmarkListener)) { throw new ClassCastException(); } myActionObject = (BookmarkListener) activity; super .onAttach(activity); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { MenuItem item1 = menu.add( 1 , 1 , 1 , "分享" ); item1.setShowAsAction(MenuItem.SHOW_AS_ACTION_WITH_TEXT | MenuItem.SHOW_AS_ACTION_ALWAYS); ImageView imageView = new ImageView( BookMarkerFragment. this .getActivity()); imageView.setBackgroundResource(R.drawable.share); imageView.setLayoutParams( new LayoutParams( 50 , 50 )); item1.setActionView(imageView); } // 初始化listview public void initListView(View view) { ListView lv = (ListView) view.findViewById(R.id.listview); List<String> list = new ArrayList<String>(); list.add( "网易" ); list.add( "腾讯" ); list.add( "新浪" ); list.add( "搜狐" ); ArrayAdapter adapter = new ArrayAdapter( BookMarkerFragment. this .getActivity(), R.layout.mytextview, R.id.text, list); lv.setAdapter(adapter); lv.setOnItemClickListener( new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) { switch (position) { case 0 : myActionObject.onChangeBookmark( "http://www.163.com" ); break ; case 1 : myActionObject.onChangeBookmark( "http://www.qq.com" ); break ; case 2 : myActionObject.onChangeBookmark( "http://www.sina.com" ); break ; case 3 : myActionObject.onChangeBookmark( "http://www.sohu.com" ); break ; } } }); } } |
内容页面(ShowFragment.java)
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package com.example.android_slidingpanellayout1; import android.app.Activity; import android.app.Fragment; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.webkit.WebView; public class ShowFragment extends Fragment { WebView webview= null ; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.show, container, false ); webview=(WebView) view.findViewById(R.id.webview); return view; } @Override public void onAttach(Activity activity) { super .onAttach(activity); } public WebView getWebView() { return webview; } } |
主界面(MainActivity.java)
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package com.example.android_slidingpanellayout1; /* * * 实现一个书签的小例子 * * */ import com.example.android_slidingpanellayout1.BookMarkerFragment.BookmarkListener; import android.os.Bundle; import android.app.ActionBar; import android.app.Activity; import android.app.Fragment; import android.app.FragmentTransaction; import android.support.v4.widget.SlidingPaneLayout; import android.support.v4.widget.SlidingPaneLayout.PanelSlideListener; import android.view.Menu; import android.view.View; import android.webkit.WebSettings; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.Toast; public class MainActivity extends Activity implements BookmarkListener { Fragment bookmarkerFragment; Fragment showFragment; SlidingPaneLayout spl = null ; ActionBar actionBar = null ; @Override protected void onCreate(Bundle savedInstanceState) { super .onCreate(savedInstanceState); setContentView(R.layout.activity_main); actionBar = this .getActionBar(); actionBar.setDisplayShowTitleEnabled( false ); actionBar.setDisplayHomeAsUpEnabled( true ); spl = (SlidingPaneLayout) this .findViewById(R.id.slidingpanellayout); spl.setPanelSlideListener( new PanelSlideListener() { @Override public void onPanelClosed(View view) { MainActivity. this .getFragmentManager() .findFragmentById(R.id.leftfragment) .setHasOptionsMenu( false ); } @Override public void onPanelOpened(View viw) { MainActivity. this .getFragmentManager() .findFragmentById(R.id.leftfragment) .setHasOptionsMenu( true ); } @Override public void onPanelSlide(View arg0, float arg1) { } }); } @Override public void onChangeBookmark(String bookmark) { ShowFragment sf = (ShowFragment) MainActivity. this .getFragmentManager() .findFragmentById(R.id.rightfragment); WebView webView = sf.getWebView(); WebSettings settings = webView.getSettings(); settings.setJavaScriptEnabled( true ); WebViewClient client = new WebViewClient(); webView.setWebViewClient(client); webView.loadUrl(bookmark); } } |
实现效果:
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