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Android Build a Weather App Concurrency and Error Handling Making Our Code Asynchronous

Posted by pratyush raj
pratyush raj
7,097 Points

i can't see the json data in the logcat???

i have done everything the teacher has said but i just cant get my data in the logcat i don't know what the problem is. first i added network state in my manifest then i uninstalled the app from the emulator like some others did but still i am not able to get any information in logcat.

my code is:- ``` public static final String TAG = MainActivity.class.getSimpleName();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);



    String forecastUrl = "http://dataservice.accuweather.com/locations/v1/cities/geoposition/search?apikey=nnwxRbmWqGpkXxqTJqitKy8PzcQ8gAsc&q=26.140421%2C85.358368&details=true";

    OkHttpClient client = new OkHttpClient();
    Request request = new Request.Builder().url(forecastUrl).build();

    Call call =client.newCall(request);
    call.enqueue(new Callback() {
        @Override
        public void onFailure(@NotNull Call call, @NotNull IOException e) {

        }

        @Override

        public void onResponse(@NotNull Call call, @NotNull Response response) throws IOException {
            try {
                if(response.isSuccessful()){
                    Log.v(TAG,response.body().string());
                    Log.d(TAG,"THIS IS WORKING");
                }
            } catch(IOException e){
                Log.e(TAG,"io Exception caught:",e);
            }

        }
    });
    Log.d(TAG,"hooray ui is running");


}

}```

and my manifest code is this:- ```<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.pratyush.weatherella"> <uses-permission android:name="android.permission.INTERNET"/> <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

<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/AppTheme">
    <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>```

i have tried everything that has been said in community still no results

my logcat :- 2020-05-05 19:50:56.127 25100-25100/? E/ush.weatherell: Unknown bits set in runtime_flags: 0x8000 2020-05-05 19:50:57.357 25100-25152/com.pratyush.weatherella D/libEGL: Emulator has host GPU support, qemu.gles is set to 1. 2020-05-05 19:50:57.357 25100-25152/com.pratyush.weatherella W/libc: Unable to set property "qemu.gles" to "1": connection failed; errno=13 (Permission denied) 2020-05-05 19:50:57.350 25100-25100/com.pratyush.weatherella W/RenderThread: type=1400 audit(0.0:180): avc: denied { write } for name="property_service" dev="tmpfs" ino=9468 scontext=u:r:untrusted_app:s0:c140,c256,c512,c768 tcontext=u:object_r:property_socket:s0 tclass=sock_file permissive=0 2020-05-05 19:50:57.423 25100-25152/com.pratyush.weatherella D/libEGL: loaded /vendor/lib/egl/libEGL_emulation.so 2020-05-05 19:50:57.430 25100-25152/com.pratyush.weatherella D/libEGL: loaded /vendor/lib/egl/libGLESv1_CM_emulation.so 2020-05-05 19:50:57.436 25100-25152/com.pratyush.weatherella D/libEGL: loaded /vendor/lib/egl/libGLESv2_emulation.so 2020-05-05 19:50:57.785 25100-25100/com.pratyush.weatherella W/ush.weatherell: Accessing hidden method Landroid/view/View;->computeFitSystemWindows(Landroid/graphics/Rect;Landroid/graphics/Rect;)Z (greylist, reflection, allowed) 2020-05-05 19:50:57.787 25100-25100/com.pratyush.weatherella W/ush.weatherell: Accessing hidden method Landroid/view/ViewGroup;->makeOptionalFitsSystemWindows()V (greylist, reflection, allowed) 2020-05-05 19:50:58.605 25100-25100/com.pratyush.weatherella D/NetworkSecurityConfig: No Network Security Config specified, using platform default 2020-05-05 19:50:58.691 25100-25100/com.pratyush.weatherella D/MainActivity: hooray ui is running 2020-05-05 19:50:58.894 25100-25150/com.pratyush.weatherella D/HostConnection: HostConnection::get() New Host Connection established 0xde43fe10, tid 25150 2020-05-05 19:50:58.902 25100-25150/com.pratyush.weatherella D/HostConnection: HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_dma_v1 ANDROID_EMU_direct_mem ANDROID_EMU_host_composition_v1 ANDROID_EMU_host_composition_v2 ANDROID_EMU_vulkan ANDROID_EMU_deferred_vulkan_commands ANDROID_EMU_vulkan_null_optional_strings ANDROID_EMU_vulkan_create_resources_with_requirements ANDROID_EMU_YUV420_888_to_NV21 ANDROID_EMU_YUV_Cache ANDROID_EMU_async_unmap_buffer GL_OES_vertex_array_object GL_KHR_texture_compression_astc_ldr ANDROID_EMU_gles_max_version_2 2020-05-05 19:50:58.913 25100-25150/com.pratyush.weatherella W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without... 2020-05-05 19:50:59.077 25100-25150/com.pratyush.weatherella D/eglCodecCommon: setVertexArrayObject: set vao to 0 (0) 0 0 2020-05-05 19:50:59.077 25100-25150/com.pratyush.weatherella D/EGL_emulation: eglCreateContext: 0xebb8ca60: maj 2 min 0 rcv 2 2020-05-05 19:50:59.085 25100-25150/com.pratyush.weatherella D/EGL_emulation: eglMakeCurrent: 0xebb8ca60: ver 2 0 (tinfo 0xf4c894a0) 2020-05-05 19:50:59.155 25100-25150/com.pratyush.weatherella W/Gralloc3: mapper 3.x is not supported 2020-05-05 19:50:59.159 25100-25150/com.pratyush.weatherella D/HostConnection: createUnique: call 2020-05-05 19:50:59.160 25100-25150/com.pratyush.weatherella D/HostConnection: HostConnection::get() New Host Connection established 0xde441670, tid 25150 2020-05-05 19:50:59.164 25100-25150/com.pratyush.weatherella D/HostConnection: HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_dma_v1 ANDROID_EMU_direct_mem ANDROID_EMU_host_composition_v1 ANDROID_EMU_host_composition_v2 ANDROID_EMU_vulkan ANDROID_EMU_deferred_vulkan_commands ANDROID_EMU_vulkan_null_optional_strings ANDROID_EMU_vulkan_create_resources_with_requirements ANDROID_EMU_YUV420_888_to_NV21 ANDROID_EMU_YUV_Cache ANDROID_EMU_async_unmap_buffer GL_OES_vertex_array_object GL_KHR_texture_compression_astc_ldr ANDROID_EMU_gles_max_version_2 2020-05-05 19:50:59.166 25100-25150/com.pratyush.weatherella D/eglCodecCommon: allocate: Ask for block of size 0x1000 2020-05-05 19:50:59.166 25100-25150/com.pratyush.weatherella D/eglCodecCommon: allocate: ioctl allocate returned offset 0x3ffff4000 size 0x2000 2020-05-05 19:50:59.442 25100-25150/com.pratyush.weatherella D/EGL_emulation: eglMakeCurrent: 0xebb8ca60: ver 2 0 (tinfo 0xf4c894a0) 2020-05-05 19:50:59.475 25100-25150/com.pratyush.weatherella D/eglCodecCommon: setVertexArrayObject: set vao to 0 (0) 1 0 2020-05-05 19:50:59.526 25100-25123/com.pratyush.weatherella I/ush.weatherell: NativeAlloc concurrent copying GC freed 4032(389KB) AllocSpace objects, 0(0B) LOS objects, 50% free, 1507KB/3043KB, paused 1.224ms total 349.508ms 2020-05-05 19:50:59.952 25100-25150/com.pratyush.weatherella I/OpenGLRenderer: Davey! duration=899ms; Flags=1, IntendedVsync=293364822722826, Vsync=293364822722826, OldestInputEvent=9223372036854775807, NewestInputEvent=0, HandleInputStart=293364827600320, AnimationStart=293364827698120, PerformTraversalsStart=293364827753720, DrawStart=293365209392520, SyncQueued=293365216980420, SyncStart=293365485018220, IssueDrawCommandsStart=293365485099420, SwapBuffers=293365784434220, FrameCompleted=293365990661620, DequeueBufferDuration=176000, QueueBufferDuration=2749000,

can someone help me fast because i just can't move forward from this i have been trying for 5 hours now

pratyush raj
pratyush raj
7,097 Points

Log.d line i have only added to check it was working or not ,before that also it was not working.

1 Answer

janet178
janet178
4,220 Points
janet178
janet178
4,220 Points

I'm not sure what version of Android you were using but there has been a behavior change to all apps that target Android 9 Pie and above. By default Http requests don't work. Because the request is not made to Log v does not appear in the Logcat. In order to make http network requests you have to specify it in the Android Manifest file. In the application tag add android: usesCleartextTraffic="true". See stack overflow:

https://stackoverflow.com/questions/51902629/how-to-allow-all-network-connection-types-http-and-https-in-android-9-pie