Android 簡單EventBus登入介面與傳值(粘性事件)
阿新 • • 發佈:2019-02-05
展示效果
新增EventBus匯入依賴
compile 'org.greenrobot:eventbus:3.0.0'
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主MainActivity方法
public classMainActivityextendsAppCompatActivity {
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("登入" );
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));
}
});
}
}
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主MainBctivity方法
public classMainBctivityextendsAppCompatActivity {
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("接受引數");
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, "請勿重複註冊事件", Toast.LENGTH_SHORT).show();
}
}
});
tv_b=(TextView)findViewById(R.id.tv_b);
tv_b.setText("賬號多少呢!");
}
@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("賬號:"+userevent.getUsername()+"密碼:"+userevent.getPasswork());
}
}
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UserEvent(事件類)
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 + '\'' +
'}';
}
}
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activity_main(MainActivity的佈局)
<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="使用者名稱"
/>
<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="密碼"
/>
<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="新使用者"android:layout_marginTop="5px"
/>
</RelativeLayout>
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activity_main_bctivity(MainBctivity的佈局)
<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" />
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