概念、優點等什麼的我就不說了網上一籮筐

廢話不說了 直接甩程式碼

1.匯入依賴

compile 'org.greenrobot:eventbus:3.0.0'

主頁面傳送訊息：

public class MainActivity extends AppCompatActivity {

    private EditText etName;
    private EditText etPwd;
    private Button butLogin;

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

        butLogin = (Button) findViewById(R.id.butLogin);
        etName = (EditText) findViewById(R.id.etName);
        etPwd = (EditText) findViewById(R.id.etPwd);

        butLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                String name = etName.getText().toString();
                String pwd  = etPwd.getText().toString();

                Toast.makeText(MainActivity.this,name+pwd,Toast.LENGTH_SHORT).show();

                EventBus.getDefault().postSticky(new MyData(name,pwd));

                Intent in = new Intent(MainActivity.this,Main2Activity.class);
                startActivity(in);
            }
        });

    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        EventBus.getDefault().unregister(this);
    }
}
 

EventBus.getDefault().register(this);

public class Main2Activity extends AppCompatActivity {

    String sName,sPwd;
    TextView name,pwd;
    Button button;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        //註冊
        EventBus.getDefault().register(this);

        button = (Button) findViewById(R.id.but);
        name = (TextView) findViewById(R.id.tvName);
        pwd  = (TextView) findViewById(R.id.tvPwd);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                name.setText(sName);
                pwd.setText(sPwd);

            }
        });
        
    }

    //接收訊息
    @Subscribe(threadMode = ThreadMode.MAIN,sticky = true)
    public void onEventMainThread(MyData data){

        sName = data.getsName();
        sPwd = data.getsPwd();

        Log.d("data","====" + sName + sPwd);

    }
}
 

public class MyData {
    private String name;
    private String pwd;

    public MyData(String sName,String sPwd) {
        name = sName;
        pwd  = sPwd;
    }

    public String getsName() {
        return name;
    }

    public String getsPwd() {
        return pwd;
    }
}