EventBus_implementation com.iflytek

    implementation 'org.greenrobot:eventbus:3.0.0'

package com.example.zsd.myapplication0314;
 
import android.app.usage.UsageEvents;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
 
import com.iflytek.cloud.InitListener;
import com.iflytek.cloud.RecognizerListener;
import com.iflytek.cloud.RecognizerResult;
import com.iflytek.cloud.SpeakerVerifier;
import com.iflytek.cloud.SpeechConstant;
import com.iflytek.cloud.SpeechError;
import com.iflytek.cloud.SpeechRecognizer;
import com.iflytek.cloud.SpeechUtility;
import com.iflytek.cloud.VerifierListener;
import com.iflytek.cloud.ui.RecognizerDialog;
import com.iflytek.cloud.ui.RecognizerDialogListener;
import com.iflytek.cloud.util.ResourceUtil;
 
import org.greenrobot.eventbus.EventBus;
import org.greenrobot.eventbus.Subscribe;
import org.greenrobot.eventbus.ThreadMode;
 
public class MainActivity extends AppCompatActivity {
 
    private TextView textView;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView = findViewById(R.id.text1);
        textView.setText("今天是星期四");
        EventBus.getDefault().register(this);
        findViewById(R.id.btn1).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(MainActivity.this,SecondActivity.class);
                startActivity(intent);
            }
        });
 
    }
    @Subscribe(threadMode = ThreadMode.MAIN)
    public void Evnt(MessageEvent messageEvent){
        textView.setText(messageEvent.getMessage());
    }
    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (EventBus.getDefault().isRegistered(this)) {
            EventBus.getDefault().unregister(this);
        }
    }
}

Second_Activity

package com.example.zsd.myapplication0314;
 
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
 
import org.greenrobot.eventbus.EventBus;
 
public class SecondActivity extends AppCompatActivity {
 
    private Button btn1;
    private EditText editText;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
        editText = findViewById(R.id.edit_1);
        btn1 = findViewById(R.id.btn2);
        btn1.setOnClickListener(new View.OnClickListener() {
                 @Override
                  public void onClick(View v) {
                     String string = editText.getText().toString();
                     EventBus.getDefault().post(new MessageEvent(string));
                     finish();
                }
           });
    }
}