api call using retrofit not working in android

Question

I am working on a demo app for learning retrofit,I have used retrofit in app and went step by step.can anyone help me? I have used @onclick annotation for making click event but it is never executing when i am clicking a button.So can anyone tell me what is the wrong from myside?

 void getContacts() {
ApiInterface apiService =
        ApiClient.getClient().create(ApiInterface.class);
Call<ContactRespones> call = apiService.getContacts();
call.enqueue(new Callback<ContactRespones>() {
    @Override
    public void onResponse(Call<ContactRespones> call, Response<ContactRespones> response) {
        System.out.print("RESPONES---------------->" + response.body().toString());
        List<ContactRequest> movies = response.body().getContacts();
        Log.d(TAG, "Number of movies received: " + movies.size());
        //  recyclerView.setAdapter(new MoviesAdapter(movies, R.layout.list_item_movie, getApplicationContext()));
    }

    @Override
    public void onFailure(Call<ContactRespones> call, Throwable t) {
        Log.e(TAG, t.toString());
    }
});

}

**

Answer 1

Add annotationProcessor to your gradle, and rebuild gradle and project:

annotationProcessor 'com.jakewharton:butterknife-compiler:8.5.1'

In your casae it will be like this:

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:24.2.1'
    compile 'com.jakewharton:butterknife:8.5.1'
    compile 'com.google.code.gson:gson:2.6.2'
    compile 'com.squareup.retrofit2:retrofit:2.0.2'
    compile 'com.squareup.retrofit2:converter-gson:2.0.2'
    compile 'com.android.support:recyclerview-v7:23.3.0'
    annotationProcessor 'com.jakewharton:butterknife-compiler:8.5.1'
}

Answer 2

your code should be like below.

private static final String TAG = MainActivity.class.getSimpleName();
    @BindView(R.id.btn_1)
    Button button;
    @BindView(R.id.lv_contacts)
    RecyclerView lv_contacts;

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

    @OnClick(R.id.btn_1)
    public void buttonclick() {
        button.setText("Clicked!");
    }

Answer 3

onCreate: Button btn = (Button) findViewById(R.id.btn_1); btn.setOnClickListener(this); Button btn = (Button) findViewById(R.id.btn_1); btn.setOnClickListener(this); get an OnClickListener: Override/implement Methods... then in the OnClick: if(view.getId()==btn_1){ do sth. } if(view.getId()==btn_1){ do sth. }

Answer 4

You can try adding this in Button view

android:onClick="buttonclick"

so It will look like:

   <Button
    android:id="@+id/btn_1"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:onClick="buttonclick"
    android:text="Get Contacts"
    android:textSize="20dp"
    android:layout_alignParentTop="true" />

Answer 5

        ## In your java code use: ##

        @InjectView(R.id.btn_1)
        Button button;

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


            }

            @OnClick(R.id.btn_1)
            void submitButton(View view) {
                if (view.getId() == R.id.btn_1) {

                    Toast.makeText(this, "Click", Toast.LENGTH_SHORT).show();
                }
            }

    ## in your activity_main.xml : ##

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin"
        android:paddingBottom="@dimen/activity_vertical_margin"
        tools:context=".MainActivity">


        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="New Button"
            android:id="@+id/btn_1"
            android:layout_alignParentTop="true"
            android:layout_alignParentLeft="true"
            android:layout_alignParentStart="true"
            android:layout_marginLeft="59dp"
            android:layout_marginStart="59dp"
            android:layout_marginTop="132dp"
            android:onClick="submitButton"/>
    </RelativeLayout>

## in build.gradle file(app) ##

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.0.0'
    compile 'com.jakewharton:butterknife:6.1.0'
}

Answer 6

我发现旧版本的butterknif使用@Bind注释可以正常工作，我已在gradle中更改了butterknife的依赖版本，如下所示，并且它的工作非常好。

compile 'com.jakewharton:butterknife:7.0.1'