public class MainActivity extends AppCompatActivity implements LifecycleOwner {
private static final String TAG = "LifecycleLiveData";
private TextView textView;
private LiveData<String> liveData;
private LifecycleRegistry lifecycleRegistry;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textView = findViewById(R.id.textView);
lifecycleRegistry = new LifecycleRegistry(this);
lifecycleRegistry.markState(Lifecycle.State.CREATED);
liveData = new MutableLiveData<>();
liveData.observe(this, new Observer<String>() {
@Override
public void onChanged(@Nullable String data) {
textView.setText(data);
}
});
}
@Override
protected void onStart() {
super.onStart();
lifecycleRegistry.markState(Lifecycle.State.STARTED);
}
@NonNull
@Override
public Lifecycle getLifecycle() {
return lifecycleRegistry;
}
public void fetchData() {
new Thread(new Runnable() {
@Override
public void run() {
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}).start();
}
}
groovy
dependencies {
implementation 'androidx.lifecycle:lifecycle-extensions:2.2.0'
}
