Android sends post requests using OkHttp

In this article, we share the specific code of sending post request using OkHttp for your reference. The specific contents are as follows

MainActivity.java

public class MainActivity extends AppCompatActivity {

 private EditText mEt_qq;
 private EditText mEt_pwd;
 private TextView mTv_status;

 String path = "http://169.254.53.96:8080/web/LoginServlet";

 private static final int SUCCESS = 665;
 private static final int FALL = 894;

 Handler handler=new Handler(){
  @Override
  public void handleMessage(Message msg) {
   switch (msg.what) {
    case SUCCESS:
     String text= (String) msg.obj;
     mTv_status.setText(text);
     break;
    case FALL:
     Toast.makeText(MainActivity.this, " No net ", Toast.LENGTH_SHORT).show();
     break;
    default:
     break;
   }
  }
 };

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  // Initialize the control 
  initVIew();
 }

 private void initVIew() {
  mEt_qq = (EditText) findViewById(R.id.et_qq);
  mEt_pwd = (EditText) findViewById(R.id.et_pwd);
  mTv_status = (TextView) findViewById(R.id.tv_status);
 }

 /**
  *  Use Post Make a form ( Key-value pair ) Upload , Complete login 
  * @param view
  */
 public void login(View view){

  // Get the information entered by the user , Make non-empty judgment 
  String qq = mEt_qq.getText().toString().trim();
  String pwd =mEt_pwd.getText().toString().trim();
  if(TextUtils.isEmpty(qq) || TextUtils.isEmpty(pwd) ){
   Toast.makeText(MainActivity.this, " Cannot be entered as null ", Toast.LENGTH_SHORT).show();
   return;
  }

  //1.0  Create okhttpClinet
  OkHttpClient okHttpClient = new OkHttpClient.Builder()
    .connectTimeout(10, TimeUnit.SECONDS)
    .readTimeout(10,TimeUnit.SECONDS)
    .writeTimeout(10,TimeUnit.SECONDS)
    .build();

  FormBody formBody= new FormBody.Builder()
    .add("qq", qq).add("pwd", pwd)
    .build();

  Request request= new Request.Builder()
    .post(formBody)
    .url(path)
    .build();

  Call call = okHttpClient.newCall(request);

  call.enqueue(new Callback() {
   @Override
   public void onFailure(Call call, IOException e) {
    handler.sendEmptyMessage(FALL);
   }

   @Override
   public void onResponse(Call call, Response response) throws IOException {
    String string = response.body().string();
    Message msg = Message.obtain();
    msg.obj=string;
    msg.what=SUCCESS;
    handler.sendMessage(msg);
   }
  });
 }
}

activity_main.xml

<LinearLayout 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:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

 <EditText
  android:id="@+id/et_qq"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:hint=" Please enter qq Number " />

 <EditText
  android:id="@+id/et_pwd"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:hint=" Please enter your password "
  android:inputType="textPassword" />

 <Button
  android:onClick="login"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:text=" Landing " />


  <TextView
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:id="@+id/tv_status"
   android:text=" Login status :"
   />

</LinearLayout>

build. gradle//Dependence

implementation 'com.squareup.okhttp3:okhttp:3.4.2'