加入Rxjava包
implementation 'io.reactivex:rxandroid:1.2.1'
implementation 'io.reactivex:rxjava:1.2.1'
public class MainActivity extends AppCompatActivity {
@BindView(R.id.text_tv)
TextView textTv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.bind(this);
//第一步创建被观察者
Observable myObservable = Observable.create(new Observable.OnSubscribe<String>() {
@Override
public void call(Subscriber<? super String> subscriber) {
subscriber.onNext("2018添加数据");
subscriber.onCompleted();
}
});
//创建观察者
Subscriber subscriber = new Subscriber<String>() {
@Override
public void onCompleted() {
Log.i("Log_","onCompleted");
}
@Override
public void onError(Throwable e) {
Log.i("Log_","onError");
}
@Override
public void onNext(String str) {
textTv.setText(str);
}
};
//订阅者
myObservable.subscribe(subscriber);
}
}
布局
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/text_tv"
android:layout_width="match_parent"
android:layout_height="122dp"
android:textSize="18sp"
android:gravity="center"/>
</LinearLayout>
模拟器显示数据