Question

我只是使用listview和webview创建一个应用程序。肖像模式工作正常。但是当我以横向模式（Android工作室模拟器）打开手机时，它有未知的缓冲区

04-28 14：07：42.822 2202-2216 / shiweichen22gmail.q1 E / Surface： getSlotFromBufferLocked：未知缓冲区：0xab7926c0

我想左侧部分可以显示带有list-view的片段，右侧部分可以显示带有web-view的片段。但它只显示list-view的片段。我已经创建了具有横向布局的android资源目录（它在android中找不到，只能在项目中找到）

这是我的代码 Portrait.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="shiweichen22gmail.q1.Portrait"
tools:showIn="@layout/activity_portrait">

<fragment
    android:id ="@+id/fragment1"
    class ="shiweichen22gmail.q1.List"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
     />
</LinearLayout>

Landscape Layout.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent">
<fragment
    android:id="@+id/fragment1"
    android:name="shiweichen22gmail.q1.List"
    android:layout_weight="1"
    android:layout_width="0dp"
    android:layout_height="match_parent">
</fragment>

<FrameLayout
    android:id="@+id/detail"
    android:name="shiweichen22gmail.q1.Detail"
    android:layout_weight="2"
    android:layout_width="0dp"
    android:layout_height="match_parent" >
</FrameLayout>


</LinearLayout>

清单。enter image description here XML

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="shiweichen22gmail.q1">
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<user-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity
        android:name=".Portrait"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
    <activity
        android:name=".Landscape"
        android:label="@string/title_activity_landscape"
        android:theme="@style/AppTheme.NoActionBar">
    </activity>
</application>
</manifest>

Portiat.java

package shiweichen22gmail.q1;

import android.content.res.Configuration;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.app.FragmentManager;
import android.content.Intent;
import android.support.v4.app.FragmentActivity;




public class Portrait extends FragmentActivity implements     List.OnSiteSelectedListener{
Detail web;
List list;
FragmentManager manager;

@Override

public void onConfigurationChanged(Configuration newConfig){
    super.onConfigurationChanged(newConfig);
    if(newConfig.orientation==Configuration.ORIENTATION_LANDSCAPE){

        Log.e("On Config Change", "LANDSCAPE");
    }else{

        Log.e("On Config Change","PORTRAIT");
    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_portrait);
    manager = getFragmentManager();
    list = (List)  getSupportFragmentManager().findFragmentById(R.id.fragment1);
    list.setRefrence(this);

}
@Override
public void onSiteSelected(int i) {
    // TODO Auto-generated method stub

    web = (Detail)   getSupportFragmentManager().findFragmentById(R.id.detail);
        // Check for content_portrait mode
        if (web!= null && web.isVisible())
        {
            web.setNewPage(i);
        }
        else
        {
            Intent intent = new Intent(this, Landscape.class);
            intent.putExtra("index", i);
            startActivity(intent);
        }
    }


}

enter image description here

Answer 1

为什么要在清单中注册两项活动？两个布局文件（Land + Port）的名称必须相同。

这样您的活动就会选择自动选择的布局。

重要： - 但在添加对布局的引用并在活动类中的视图上添加侦听器之前，您必须检查当前的方向是否会导致NullPointer崩溃，因为您将尝试没有夸大的观点的参考。

您需要做什么： -

从清单
更改与纵向相同的横向布局名称，并将其移动到资源目录中的layout-land文件夹。
在活动类中使用findviewbyId之前，您必须检查当前方向是陆地还是港口。

示例工作代码

主要活动类

公共类HomeActivity扩展了FragmentActivity {

private UniversalWebViewFragment detailFragment;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.home_activity);

    ListView listView = (ListView) findViewById(R.id.selector);

    final ArrayList<String> list = new ArrayList<String>();
    for (int i = 0; i < 10; i++) {
        //Load random Google search URLS for List
        list.add("https://www.google.com/search?q=" + i);
    }

    listView.setAdapter(new ArrayAdapter(this, android.R.layout.simple_list_item_1, list));

    if (!isPortrait(getApplicationContext())) {
        detailFragment = (UniversalWebViewFragment) getSupportFragmentManager().findFragmentById(R.id.webView);
    }

    listView.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {

            if (isPortrait(getApplicationContext())) {

                Toast.makeText(getApplicationContext(), "Do Fragment Transition with URL" + list.get(arg2), 300).show();

            } else {

                if (null != detailFragment)
                    detailFragment.loadURL(list.get(arg2));

            }
        }
    });

}
//Check if device is in portrait mode
public static boolean isPortrait(Context context) {

    return context.getResources().getBoolean(R.bool.is_portrait);
}

}

RES /布局/ home_activity.xml

<ListView
    android:id="@+id/selector"
    android:layout_width="200dp"
    android:layout_height="match_parent"
    android:layout_alignParentLeft="true" >
</ListView>

RES /布局脊/ home_activity.xml

<ListView
    android:id="@+id/selector"
    android:layout_width="200dp"
    android:layout_height="match_parent"
    android:layout_alignParentLeft="true" >
</ListView>

<fragment
    android:id="@+id/webView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_toRightOf="@+id/selector"
    class="com.masterdetail_webview.UniversalWebViewFragment" />

检测设备方向

RES /值/ layouts.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <bool name="is_portrait">true</bool>
</resources>

RES /值-脊/ layouts.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <bool name="is_portrait">false</bool>
</resources>

借助 {strong> UniversalWebViewFragment

显示网页内容的其他内容
在片段中加载webcontents只需将此类放在项目中

import android.annotation.SuppressLint; import android.app.Dialog; import android.app.ProgressDialog; import android.content.DialogInterface; import android.content.DialogInterface.OnCancelListener; import android.graphics.Bitmap; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnKeyListener; import android.view.ViewGroup; import android.webkit.WebChromeClient; import android.webkit.WebView; import android.webkit.WebViewClient; import android.widget.FrameLayout; @SuppressLint("NewApi") public class UniversalWebViewFragment extends Fragment { public static final String WEB_URL_TO_LOAD = "webURLToLoad"; private static final String GOOGLE_SERACH_URL = "https://www.google.com/search?q="; private WebView webView; private FrameLayout customViewContainer; private WebChromeClient.CustomViewCallback customViewCallback; private View mCustomView; private myWebChromeClient mWebChromeClient; private myWebViewClient mWebViewClient; public static UniversalWebViewFragment newInstance(String webUrl, boolean serachOnWeb) { Bundle bdl = new Bundle(); if (serachOnWeb) { // serach on google for query bdl.putString(WEB_URL_TO_LOAD, GOOGLE_SERACH_URL + webUrl); } else { // seimply load url bdl.putString(WEB_URL_TO_LOAD, webUrl); } UniversalWebViewFragment newInstance = new UniversalWebViewFragment(); newInstance.setArguments(bdl); return newInstance; } /** * Called when the activity is first created. */ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.universal_web_view, container, false); // if (null != getArguments() && null != // getArguments().getString(WEB_URL_TO_LOAD)) { customViewContainer = (FrameLayout) rootView.findViewById(R.id.customViewContainer); webView = (WebView) rootView.findViewById(R.id.webView); mWebViewClient = new myWebViewClient(); webView.setWebViewClient(mWebViewClient); mWebChromeClient = new myWebChromeClient(); webView.setWebChromeClient(mWebChromeClient); webView.getSettings().setJavaScriptEnabled(true); // Important for PayUMoney webView.getSettings().setDomStorageEnabled(true); webView.getSettings().setAppCacheEnabled(true); webView.getSettings().setBuiltInZoomControls(true); webView.getSettings().setSaveFormData(true); loadURL(GOOGLE_SERACH_URL); // webView.requestFocus(); // Handle Back keyPress rootView.setFocusableInTouchMode(true); rootView.requestFocus(); rootView.setOnKeyListener(new OnKeyListener() { @Override public boolean onKey(View v, int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_BACK) { if (inCustomView()) { hideCustomView(); getActivity().getSupportFragmentManager().popBackStack(); return true; } if ((mCustomView == null) && webView.canGoBack()) { webView.goBack(); getActivity().getSupportFragmentManager().popBackStack(); return true; } } // return super.onKeyDown(keyCode, event); return true; } }); // } return rootView; } /** * */ public void loadURL(String URl) { webView.loadUrl(URl); } public boolean inCustomView() { return (mCustomView != null); } public void hideCustomView() { mWebChromeClient.onHideCustomView(); } @Override public void onPause() { super.onPause(); // To change body of overridden methods use File | // Settings | File Templates. webView.onPause(); } @Override public void onResume() { super.onResume(); // To change body of overridden methods use File | // Settings | File Templates. webView.onResume(); } @Override public void onStop() { super.onStop(); // To change body of overridden methods use File | // Settings | File Templates. if (inCustomView()) { hideCustomView(); } } class myWebChromeClient extends WebChromeClient { private View mVideoProgressView; @Override public void onShowCustomView(View view, int requestedOrientation, CustomViewCallback callback) { onShowCustomView(view, callback); // To change body of overridden // methods use File | Settings | // File Templates. } @Override public void onShowCustomView(View view, CustomViewCallback callback) { // if a view already exists then immediately terminate the new one if (mCustomView != null) { callback.onCustomViewHidden(); return; } mCustomView = view; webView.setVisibility(View.GONE); customViewContainer.setVisibility(View.VISIBLE); customViewContainer.addView(view); customViewCallback = callback; } @Override public View getVideoLoadingProgressView() { if (mVideoProgressView == null) { LayoutInflater inflater = LayoutInflater.from(getActivity()); mVideoProgressView = inflater.inflate(R.layout.video_progress, null); } return mVideoProgressView; } @Override public void onHideCustomView() { super.onHideCustomView(); // To change body of overridden methods // use File | Settings | File Templates. if (mCustomView == null) return; webView.setVisibility(View.VISIBLE); customViewContainer.setVisibility(View.GONE); // Hide the custom view. mCustomView.setVisibility(View.GONE); // Remove the custom view from its container. customViewContainer.removeView(mCustomView); customViewCallback.onCustomViewHidden(); mCustomView = null; } } class myWebViewClient extends WebViewClient { @Override public boolean shouldOverrideUrlLoading(WebView view, String url) { return super.shouldOverrideUrlLoading(view, url); } private int webViewPreviousState; private final int PAGE_STARTED = 0x1; private final int PAGE_REDIRECTED = 0x2; Dialog dialog = new Dialog(getActivity()); @Override public void onPageStarted(WebView view, String url, Bitmap favicon) { super.onPageStarted(view, url, favicon); webViewPreviousState = PAGE_STARTED; if (dialog == null || !dialog.isShowing()) dialog = ProgressDialog.show(getActivity(), "", "Loading Please Wait", true, true, new OnCancelListener() { @Override public void onCancel(DialogInterface dialog) { // do something } }); } @Override public void onPageFinished(WebView view, String url) { if (webViewPreviousState == PAGE_STARTED) { if (null != dialog) dialog.dismiss(); dialog = null; } } } }

RES /布局/ universal_web_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="fill_parent" android:layout_height="fill_parent" > <WebView android:layout_width="fill_parent" android:layout_height="fill_parent" android:id="@+id/webView" android:layout_gravity="center" /> <FrameLayout android:id="@+id/customViewContainer" android:layout_width="fill_parent" android:layout_height="fill_parent" android:visibility="gone" /> </LinearLayout>

youtube进度的额外布局（以防万一）

res / video_progress

<ProgressBar android:id="@android:id/progress" style="?android:attr/progressBarStyleLarge" android:layout_gravity="center" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <TextView android:paddingTop="5dip" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:text="loading" android:textSize="14sp" android:textColor="?android:attr/textColorPrimary"/>

结果： - 我在安全的代理网络中，在开放网络中看起来不错

Answer 2

在您的情况下无需处理两个xml 只需在主要活动中添加两者，并为两者赋予0.5的重量。并检查您是否是纵向模式然后隐藏一个片段，当用户是横向可见的第二个片段时。

还有一件事你没有设定最大重量第一性最大体重。 并且大多数imp在menifest.xml中添加一行

 android:configChanges="orientation|screenSize" />

如果你想在方向改变时做一些代码，那么你可以覆盖onConfigurationChanged（）方法

 @Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);
    // write here code
   // here you can check orientation and set your code as per your requirement
}

Answer 3

尝试覆盖您的活动中的onConfigurationChanged()。

@Override

 public void onConfigurationChanged(Configuration newConfig) {

   super.onConfigurationChanged(newConfig);

 }

横向模式无法显示两个片段

3 个答案: