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react native 安卓启动页
Installation
First step(Download):
npm i react-native-splash-screen --save
Android:
- In your
android/settings.gradle
file, make the following additions:
include ':react-native-splash-screen' project(':react-native-splash-screen').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-splash-screen/android')
- In your android/app/build.gradle file, add the
:react-native-splash-screen
project as a compile-time dependency:
... dependencies { ... implementation project(':react-native-splash-screen') }
- Update the MainApplication.java file to use
react-native-splash-screen
via the following changes:
// react-native-splash-screen >= 0.3.1 import org.devio.rn.splashscreen.SplashScreenReactPackage; // react-native-splash-screen < 0.3.1 import com.cboy.rn.splashscreen.SplashScreenReactPackage; public class MainApplication extends Application implements ReactApplication { private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) { @Override public boolean getUseDeveloperSupport() { return BuildConfig.DEBUG; } @Override protected List<ReactPackage> getPackages() { return Arrays.<ReactPackage>asList( new MainReactPackage(), new SplashScreenReactPackage() //here ); } }; @Override public ReactNativeHost getReactNativeHost() { return mReactNativeHost; } }
Third step(Plugin Configuration):
Android:
Update the MainActivity.java
to use react-native-splash-screen
via the following changes:
import android.os.Bundle; // here import com.facebook.react.ReactActivity; // react-native-splash-screen >= 0.3.1 import org.devio.rn.splashscreen.SplashScreen; // here // react-native-splash-screen < 0.3.1 import com.cboy.rn.splashscreen.SplashScreen; // here public class MainActivity extends ReactActivity { @Override protected void onCreate(Bundle savedInstanceState) { SplashScreen.show(this); // here super.onCreate(savedInstanceState); } // ...other code }
Getting started
Import react-native-splash-screen
in your JS file.
import SplashScreen from 'react-native-splash-screen'
Android:
Create a file called launch_screen.xml
in app/src/main/res/layout
(create the layout
-folder if it doesn't exist). The contents of the file should be the following:
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <ImageView android:layout_width="match_parent" android:layout_height="match_parent" android:src="@drawable/launch_screen" android:scaleType="centerCrop" /> </RelativeLayout>
Customize your launch screen by creating a launch_screen.png
-file and placing it in an appropriate drawable
-folder. Android automatically scales drawable, so you do not necessarily need to provide images for all phone densities. You can create splash screens in the following folders:
drawable-ldpi
drawable-mdpi
drawable-hdpi
drawable-xhdpi
drawable-xxhdpi
drawable-xxxhdpi
Add a color called primary_dark
in app/src/main/res/values/colors.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="primary_dark">#000000</color>
</resources>
Optional steps:
If you want the splash screen to be transparent, follow these steps.
Open android/app/src/main/res/values/styles.xml
and add <item name="android:windowIsTranslucent">true</item>
to the file. It should look like this:
<resources> <!-- Base application theme. --> <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar"> <!-- Customize your theme here. --> <!--设置透明背景--> <item name="android:windowIsTranslucent">true</item> </style> </resources>
To learn more see examples
If you want to customize the color of the status bar when the splash screen is displayed:
Create android/app/src/main/res/values/colors.xml
and add
<?xml version="1.0" encoding="utf-8"?> <resources> <color name="status_bar_color"><!-- Colour of your status bar here --></color> </resources>
Create a style definition for this in android/app/src/main/res/values/styles.xml
:
<?xml version="1.0" encoding="utf-8"?> <resources> <style name="SplashScreenTheme" parent="SplashScreen_SplashTheme"> <item name="colorPrimaryDark">@color/status_bar_color</item> </style> </resources>
Change your show
method to include your custom style:
SplashScreen.show(this, R.style.SplashScreenTheme);
Usage
Use like so:
import SplashScreen from 'react-native-splash-screen' export default class WelcomePage extends Component { componentDidMount() { // do stuff while splash screen is shown // After having done stuff (such as async tasks) hide the splash screen SplashScreen.hide(); } }
API
Method | Type | Optional | Description |
---|---|---|---|
show() | function | false | Open splash screen (Native Method ) |
show(final Activity activity, final boolean fullScreen) | function | false | Open splash screen (Native Method ) |
hide() | function | false | Close splash screen |
Testing
Jest
For Jest to work you will need to mock this component. Here is an example:
// __mocks__/react-native-splash-screen.js
export default {
show: jest.fn().mockImplementation( () => { console.log('show splash screen'); } ),
hide: jest.fn().mockImplementation( () => { console.log('hide splash screen'); } ),
}
Troubleshooting
Splash screen always appears stretched/distorted
Add the ImageView with a scaleType in the launch_screen.xml
, e.g.:
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<ImageView
android:src="@drawable/launch_screen"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
>
</ImageView>
</FrameLayout>
Contribution
Issues are welcome. Please add a screenshot of you bug and a code snippet. Quickest way to solve issue is to reproduce it in one of the examples.
Pull requests are welcome. If you want to change the API or do something big it is best to create an issue and discuss it first.