在android studio中调用api时无法连接到/192.xxx.x.xxx:8000

如何解决在android studio中调用api时无法连接到/192.xxx.x.xxx:8000

当用户单击登录按钮时，我想调用登录 api(django)。我也创建了 apiinterface 和 apiclient。但是当我单击登录按钮时，它向我显示文本：***无法连接到/我的 IP 地址:8000.***我正在使用 pgadmin.Server 已经运行并且 api 在 postman 中工作正常，我不知道为什么它没有连接并给我消息连接失败？？请帮帮我！！

  public class apiclient {
    private static final String BASE_URL="http://192.168.0.102/auth/";
    private static apiclient mInstance;
    private Retrofit retrofit;

    private apiclient(){
        retrofit=new Retrofit.Builder()
                .baseUrl(BASE_URL)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
    }
    public static synchronized apiclient getInstance(){
        if (mInstance==null){
            mInstance=new apiclient();
        }
        return mInstance;
    }
     public ApiInterface getApi(){
        return retrofit.create(ApiInterface.class);

    }
}

 Call<ResponseBody> call=apiclient.getInstance().getApi().performUserLogin(username,password);
    call.enqueue(new Callback<ResponseBody>() {
        @Override
        public void onResponse(Call<ResponseBody> call,Response<ResponseBody> response) {
            try {
                String s =response.body().string();
                Toast.makeText(MainActivity.this,s,Toast.LENGTH_SHORT).show();
            } catch (IOException e) {
                e.printstacktrace();
            }

        }

        @Override
        public void onFailure(Call<ResponseBody> call,Throwable t) {
                Toast.makeText(MainActivity.this,t.getMessage(),Toast.LENGTH_SHORT).show();
        }
    });
}

公共接口 ApiInterface {

    @FormUrlEncoded
    @POST("registeruser")
    Call<ResponseBody>performUserSignIn(@Field("username") String username,@Field("full_name") String full_name,@Field("password") String password,@Field("confirm_password") String confirm_password);

    @FormUrlEncoded
    @POST("loginuser")
    Call<ResponseBody>performUserLogin( @Field("username") String username,@Field("password") String password );

}

这里是 manifest.xml

    <?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.myapplication">
    <uses-permission android:name="android.permission.INTERNET" />
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.MyApplication"
        android:usesCleartextTraffic="true">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

这是日志

 2021-06-02 01:30:19.564 30836-30836/? I/art: Late-enabling -Xcheck:jni
2021-06-02 01:30:19.574 30836-30836/? D/TidaProvider: TidaProvider()
2021-06-02 01:30:19.579 30836-30836/? V/BoostFramework: BoostFramework() : mPerf = com.qualcomm.qti.Performance@2571bb
2021-06-02 01:30:19.668 30836-30836/com.example.myapplication W/System: ClassLoader referenced unkNown path: /data/app/com.example.myapplication-1/lib/arm64
2021-06-02 01:30:19.671 30836-30836/com.example.myapplication W/ResourceType: No package identifier when getting name for resource number 0x00000000
2021-06-02 01:30:19.694 30836-30836/com.example.myapplication W/ResourceType: No package identifier when getting name for resource number 0x00000000
2021-06-02 01:30:19.698 30836-30836/com.example.myapplication W/ResourceType: No package identifier when getting name for resource number 0x00000000
2021-06-02 01:30:19.711 30836-30836/com.example.myapplication W/art: Before Android 4.1,method android.graphics.PorterDuffColorFilter androidx.vectordrawable.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter,android.content.res.ColorStateList,android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
2021-06-02 01:30:19.717 30836-30836/com.example.myapplication D/AccessibilityManager: current package=com.example.myapplication,accessibility manager mIsFinalEnabled=false,mOptimizeEnabled=true,mIsUiAutomationEnabled=false,mIsInterestedPackage=false
2021-06-02 01:30:19.765 30836-30836/com.example.myapplication I/TypefaceUtils: Typeface has no familyName field
2021-06-02 01:30:19.832 30836-30836/com.example.myapplication E/HAL: PATH3 /odm/lib64/hw/gralloc.qcom.so
2021-06-02 01:30:19.832 30836-30836/com.example.myapplication E/HAL: PATH2 /vendor/lib64/hw/gralloc.qcom.so
2021-06-02 01:30:19.832 30836-30836/com.example.myapplication E/HAL: PATH1 /system/lib64/hw/gralloc.qcom.so
2021-06-02 01:30:19.832 30836-30836/com.example.myapplication E/HAL: PATH3 /odm/lib64/hw/gralloc.msm8953.so
2021-06-02 01:30:19.832 30836-30836/com.example.myapplication E/HAL: PATH2 /vendor/lib64/hw/gralloc.msm8953.so
2021-06-02 01:30:19.832 30836-30836/com.example.myapplication E/HAL: PATH1 /system/lib64/hw/gralloc.msm8953.so
2021-06-02 01:30:19.855 30836-30853/com.example.myapplication I/Adreno: QUALCOMM build                   : 01d2d27,I3d52eaf367
    Build Date                       : 12/10/16
    OpenGL ES Shader Compiler Version: XE031.09.00.03
    Local Branch                     : 
    Remote Branch                    : 
    Remote Branch                    : 
    Reconstruct Branch               : 
2021-06-02 01:30:19.861 30836-30853/com.example.myapplication I/Openglrenderer: Initialized EGL,version 1.4
2021-06-02 01:30:19.861 30836-30853/com.example.myapplication D/Openglrenderer: Swap behavior 1
2021-06-02 01:30:22.752 30836-30836/com.example.myapplication V/BoostFramework: BoostFramework() : mPerf = com.qualcomm.qti.Performance@535c6a8
2021-06-02 01:30:22.913 30836-30836/com.example.myapplication D/NetworkSecurityConfig: No Network Security Config specified,using platform default
2021-06-02 01:30:22.976 30836-30836/com.example.myapplication I/Toast: Show toast from OpPackageName:com.example.myapplication,PackageName:com.example.myapplication
2021-06-02 01:30:31.946 30836-30836/com.example.myapplication W/IInputConnectionWrapper: reportFullscreenMode on inexistent InputConnection

解决方法

你的 BASE_URL 是一个本地主机，发布你的 API

由于它是 HTTP URL 明文流量许可，因此可能会成为一个问题。如果有效，请尝试以下解决方案。

AndroidManifest.xml -

<?xml version="1.0" encoding="utf-8"?>
<manifest ...>
    <uses-permission android:name="android.permission.INTERNET" />
    <application
        ...
        android:usesCleartextTraffic="true"
        ...>
        ...
    </application>
</manifest>