先來看下常用手機(jī)分辨率

//   mdpi    480*320
//   hdpi    800*480
//   xhdpi   1280*720
//   xhdpi   1920*1080

修改APP名稱

找到android/app/src/main/AndroidManifest.xml

<application
            android:name=".MainApplication"
            android:label="@string/app_name"
            android:icon="@mipmap/ic_launcher"
            android:allowBackup="false"
            android:theme="@style/AppTheme">             
    </application>

找到 android:label = "@string/app_name"。這個(gè)對(duì)應(yīng)的就是APP的名稱

進(jìn)入：android/app/src/main/res/valuse/strings.xml目錄下

<resources>
    <string name="app_name">APP名稱</string>
</resources>

修改APP圖標(biāo)

1、找到讀取APP圖標(biāo)的地方

進(jìn)入目錄：：android/app/src/main/AndroidManifest.xml

<application
            android:name=".MainApplication"
            android:label="@string/app_name"
            android:icon="@mipmap/ic_launcher"
            android:allowBackup="false"
            android:theme="@style/AppTheme">             
</application>

可以看到，icon是在mipmap文件下的ic_launcher圖片，因此，在android/app/src/main/res下新建mipmap_hdpi, mipmap_mdpi, mipmap_xhdpi，mipmap_xxhdpi文件，里面分別存放圖片ic_launcher,
分辨率分別為72x72, 48x48, 96x96, 144x144

修改Splash

附上地址：https://github.com/crazycodeboy/react-native-splash-screen

安裝

npm install react-native-splash-screen --save
react-native link react-native-splash-screen

檢查 link

settings.gradle

include ':react-native-splash-screen'
project(':react-native-splash-screen').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-splash-screen/android')

build.gradle

compile project(':react-native-splash-screen')

MainApplication.java

import org.devio.rn.splashscreen.SplashScreenReactPackage;

new SplashScreenReactPackage()

啟動(dòng)頁設(shè)置

在android/app/src/main/res下新建layout文件，launch_screen.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:orientation="vertical" android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:background="@drawable/launch_screen">
</LinearLayout>

MainActivity.java

import android.os.Bundle; 
import org.devio.rn.splashscreen.SplashScreen;

protected void onCreate(Bundle savedInstanceState) {
       SplashScreen.show(this);  // <--添加這一句
       super.onCreate(savedInstanceState);     
}

在android/app/src/main/res下新建drawable_hdpi, drawable_mdpi, drawable_xhdpi，drawable_xxhdpi文件，里面分別存放圖片launch_screen,
分辨率分別為文章開頭提到的分辨率,
在你首個(gè)頁面增加

import SplashScreen from 'react-native-splash-screen';

componentDidMount() {
        SplashScreen.hide(); //關(guān)閉啟動(dòng)屏幕    
}

至此，整個(gè)啟動(dòng)頁完成了