EventBus粘性事件、点击跳转登录传值

展示效果

添加EventBus导入依赖

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1	compile 'org.greenrobot:eventbus:3.0.0'

主MainActivity方法

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public class MainActivity extends AppCompatActivity {   private EditText username,password;   private Button btn_go;   private List<UserEvent> mdata;   @Override   protected void onCreate(Bundle savedInstanceState) {   super .onCreate(savedInstanceState);   setContentView(R.layout.activity_main);   mdata= new ArrayList<UserEvent>();   username=(EditText)findViewById(R.id.username);   password=(EditText)findViewById(R.id.passwork);   btn_go=(Button)findViewById(R.id.btn_go);   btn_go.setText( "登录" );   btn_go.setOnClickListener( new View.OnClickListener() {    @Override    public void onClick(View view) {    String name = username.getText().toString().trim();    String pass = password.getText().toString().trim();    EventBus.getDefault().postSticky( new UserEvent(name,pass));    startActivity( new Intent(MainActivity. this ,MainBctivity. class ));    }   });   } }

主MainBctivity方法

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public class MainBctivity extends AppCompatActivity {   private Button btn_shou;   private TextView tv_b;   @Override   protected void onCreate(Bundle savedInstanceState) {   super .onCreate(savedInstanceState);   setContentView(R.layout.activity_main_bctivity);   btn_shou=(Button)findViewById(R.id.btn_shou);   btn_shou.setText( "接受参数" );   btn_shou.setOnClickListener( new View.OnClickListener() {    @Override    public void onClick(View view) {    if (!EventBus.getDefault().isRegistered(MainBctivity. this )){     EventBus.getDefault().register(MainBctivity. this );    } else {     Toast.makeText(MainBctivity. this , "请勿重复注册事件" , Toast.LENGTH_SHORT).show();    }    }   });   tv_b=(TextView)findViewById(R.id.tv_b);   tv_b.setText( "账号多少呢！" );     }     @Override   protected void onDestroy() {   super .onDestroy();   EventBus.getDefault().unregister(MainBctivity. this );   }   @Subscribe (threadMode = ThreadMode.POSTING,sticky = true )   public void onMoonEvent(UserEvent userevent){   tv_b.setText( "账号：" +userevent.getUsername()+ "密码：" +userevent.getPasswork());   } }

UserEvent（事件类）

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public class UserEvent {   private String username;   private String passwork;     public UserEvent(String username, String passwork) {   this .username = username;   this .passwork = passwork;   }     public String getUsername() {   return username;   }     public void setUsername(String username) {   this .username = username;   }     public String getPasswork() {   return passwork;   }     public void setPasswork(String passwork) {   this .passwork = passwork;   }     public UserEvent() {   }     @Override   public String toString() {   return "UserEvent{" +    "username='" + username + '\ '' +    ", passwork='" + passwork + '\ '' +    '}' ;   } }

activity_main（MainActivity的布局）

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< RelativeLayout   android:layout_width = "match_parent"   android:layout_height = "match_parent" >   < ImageView    android:id = "@+id/hh_img"    android:layout_width = "wrap_content"    android:layout_height = "wrap_content"    android:src = "@mipmap/logo"    android:layout_centerHorizontal = "true"    android:layout_marginTop = "40dp"    />   < EditText    android:id = "@+id/username"    android:layout_below = "@id/hh_img"    android:layout_width = "match_parent"    android:layout_height = "wrap_content"    android:layout_marginTop = "10dp"    android:hint = "用户名"    />   < EditText    android:id = "@+id/passwork"    android:layout_width = "match_parent"    android:layout_height = "wrap_content"    android:layout_below = "@id/username"    android:layout_marginTop = "10dp"    android:hint = "密码"    />   < Button    android:id = "@+id/btn_go"    android:layout_below = "@id/passwork"    android:layout_marginTop = "10dp"    android:layout_width = "match_parent"    android:layout_height = "wrap_content"    />   < TextView    android:id = "@+id/new_user"    android:layout_width = "wrap_content"    android:layout_height = "wrap_content"    android:layout_below = "@id/btn_go"    android:text = "新用户"    android:layout_marginTop = "5px"    />   </ RelativeLayout >

activity_main_bctivity（MainBctivity的布局）

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< Button   android:layout_width = "wrap_content"   android:layout_height = "wrap_content"   android:layout_alignParentTop = "true"   android:layout_centerHorizontal = "true"   android:layout_marginTop = "20dp"   android:id = "@+id/btn_shou" />     < TextView   android:layout_width = "wrap_content"   android:layout_height = "wrap_content"   android:layout_below = "@+id/btn_shou"   android:layout_centerHorizontal = "true"   android:layout_marginTop = "32dp"   android:id = "@+id/tv_b" />