Question

我正在开发页面上开发一个带有TextView和ImageView的简单Android应用程序。当我将手机旋转到横向模式时，应用程序崩溃了。虽然我看到该应用程序没有被杀死，但它只是消失了，我可以看到它仍然在Android Studio中运行。以下是我的代码：

Content_main.xml -landscape模式

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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="wrap_content"
    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="com.example.viral.myapplication2.MainActivity"
    tools:showIn="@layout/activity_main">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        android:id="@+id/textView2" />
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="@string/ganpati_bappa_moraya"
        android:id="@+id/textView"
        tools:context=".Blink"
        android:textAlignment="center"
        android:textSize="@dimen/abc_action_button_min_width_overflow_material"
        android:layout_alignRight="@+id/imageView"
        android:layout_alignEnd="@+id/imageView"
        android:layout_alignLeft="@+id/imageView"
        android:layout_alignStart="@+id/imageView" />
    <ImageView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/imageView"
        android:layout_centerHorizontal="true"
        android:src="@mipmap/god_pic"
        android:layout_below="@+id/textView" />
</RelativeLayout>

Content_main.xml - 适用于普通模式 - 肖像

 <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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: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="com.example.viral.myapplication2.MainActivity"
    tools:showIn="@layout/activity_main">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World!"
        android:id="@+id/textView2" />

    <TextView
        android:layout_width="400dp"
        android:layout_height="100dp"
        android:text="Ganpati Bappa Moraya !!!"
        android:id="@+id/textView"
        android:layout_below="@+id/textView2"
        android:layout_centerHorizontal="true"
        tools:context=".Blink"
        android:layout_marginTop="84dp"
        android:textAlignment="center"
        android:textSize="@dimen/abc_action_button_min_width_overflow_material" />

    <ImageView
        android:layout_width="500dp"
        android:layout_height="200dp"
        android:id="@+id/imageView"
        android:layout_below="@+id/textView"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="10dp"
        android:src="@mipmap/god_pic" />
</RelativeLayout>

Android_Manifest.xml文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.viral.myapplication2">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/god_pic"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:configChanges="keyboardHidden|orientation"
            android:theme="@style/AppTheme.NoActionBar">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Answer 1

将AndroidManifest.xml文件修改为此

android:configChanges="keyboardHidden|orientation|screenSize".

screenSize属性将关注屏幕方向更改，活动生命周期不会再次调用。

更改为横向时Android应用程序崩溃

1 个答案: