java - 平板电脑用户界面在我的应用程序上不起作用

Question

我正在尝试为平板电脑和手机创建一个具有两个不同 UI 的应用程序，并且我正在使用 fragment 来实现它。我为每个平板电脑和手机布局创建了两个单独的 xml 文件，都称为 activity_main.xml，手机布局放在 res/layout 文件夹中，平板电脑布局放在 res/layout-sw600dp 文件夹中。

但是，当我尝试在 Nexus 10 模拟器 (Android Studio) 上运行我的应用程序时，它会自动转到默认手机布局。该应用程序不会崩溃或发生任何事情，但它应该在平板电脑用户界面中运行时却在手机用户界面中运行。我不知道此错误的来源可能是什么，因此我们将不胜感激。

这里有一个更新，我尝试将文件夹重命名为 res/layout-large-mdpi 但仍然没有发现任何变化。有没有可能跟模拟器有关系？

这是我的 list :

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.androidattack.www.sunshine" >

    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.androidattack.www.sunshine.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>
        <activity
            android:name="com.androidattack.www.sunshine.DetailActivity"
            android:label="@string/title_activity_detail"
            android:parentActivityName="com.androidattack.www.sunshine.MainActivity" >
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value="com.androidattack.www.sunshine.MainActivity" />
        </activity>
        <activity
            android:name="com.androidattack.www.sunshine.SettingsActivity"
            android:label="@string/title_activity_settings"
            android:parentActivityName="com.androidattack.www.sunshine.MainActivity" >
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value="com.androidattack.www.sunshine.MainActivity" />
        </activity>
        <provider
            android:authorities="com.androidattack.www.sunshine"
            android:name=".data.WeatherProvider" />
    </application>

</manifest>

sw600dp 布局:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:divider="?android:attr/dividerHorizontal"
    android:baselineAligned="false"
    tools:context="com.androidattack.www.sunshine.MainActivity">

    <fragment
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:name="com.androidattack.www.sunshine.ForecastFragment"
        android:id="@+id/fragment_forecast"
        android:layout_gravity="center_vertical"
        android:layout_weight="1" />

    <FrameLayout
        android:layout_width="0dp"
        android:layout_height="fill_parent"
        android:layout_weight="2"
        android:id="@+id/weather_detail_container">

    </FrameLayout>


</LinearLayout>

正常布局:

<fragment xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/fragment_forecast"
    android:name="com.androidattack.www.sunshine.ForecastFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginLeft="16dp"
    android:layout_marginRight="16dp"
    tools:context="com.androidattack.www.sunshine.ForecastFragment"
    tools:ignore="MergeRootFrame"
    tools:layout="@android:layout/list_content" />

最后这是我的 MainActivity.java 类:

/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.androidattack.www.sunshine;

import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;


public class MainActivity extends ActionBarActivity {

    private final String LOG_TAG = MainActivity.class.getSimpleName();
    private boolean mTwoPane;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        if (findViewById(R.id.weather_detail_container) != null) {
            // Tablet view
            mTwoPane = true;

            // In two-pane mode, show the detail view by adding
            // or replacing the detail fragment using a
            // fragment transaction.

            if (savedInstanceState == null) {
                getSupportFragmentManager().beginTransaction()
                        .replace(R.id.weather_detail_container, new DetailFragment())
                        .commit();
            }
        } else {
            // Phone View
            mTwoPane = false;
        }
    }


    @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;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            startActivity(new Intent(this, SettingsActivity.class));
            return true;
        }
        if (id == R.id.action_map) {
            openPreferredLocationInMap();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    private void openPreferredLocationInMap() {
        SharedPreferences sharedPrefs =
                PreferenceManager.getDefaultSharedPreferences(this);
        String location = sharedPrefs.getString(
                getString(R.string.pref_location_key),
                getString(R.string.pref_location_default));

        // Using the URI scheme for showing a location found on a map.  This super-handy
        // intent can is detailed in the "Common Intents" page of Android's developer site:
        // http://developer.android.com/guide/components/intents-common.html#Maps
        Uri geoLocation = Uri.parse("geo:0,0?").buildUpon()
                .appendQueryParameter("q", location)
                .build();

        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setData(geoLocation);

        if (intent.resolveActivity(getPackageManager()) != null) {
            startActivity(intent);
        } else {
            Log.d(LOG_TAG, "Couldn't call " + location + ", no receiving apps installed!");
        }
    }
}

Answer 1

对我来说，代码是正确的，但问题出在模拟器上。如果您将模拟器设置为 No skin，它应该可以工作。去掉那层皮!