当我从另一个活动返回到活动时,我想专注于editText
的末尾。我传递带有Intent
viewName
以过滤应聚焦的视图。我正在使用 ViewModel
- Data Binding
模型类将数据设置为views
问题我可以从意图和视图中获取值,但我无法获得文本的大小以将光标设置为editText
文本的末尾。虽然每个视图都设置了值,但我可以看到并用这些值做其他事情。唯一的问题是在开始时getText().toString()
最后设置焦点。
bindingName.viewName.getText().toString()
始终为空,因此光标停留在开头。
如果我在onCreate()或onResume()状态下调用requestFocus
,则会出现此问题。 但是如果我将其放在稍后执行的某个方法中,则可以正常工作。
Java Step1.class
public class Step1 extends Activity implements AdapterView.OnItemSelectedListener, View.OnClickListener {
Step1Binding step1Binding;
....
SubmittedModel submittedModel;
boolean isTerritorySet = false;
boolean isCeNameSet = false;
boolean isDistributorSet = false;
boolean isPSRSet = false;
boolean isInEditMode = false;
String viewName;
private ArrayList<ArrayList<String>> areaList = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
step1Binding = DataBindingUtil.setContentView(this, R.layout.layout_step1);
.....
submittedModel = new SubmittedModel();
submittedModel.setUser_id(UserInfo.getInstance().getUserInfo(this).getUserId());
.....
if (getIntent().hasExtra("value")) {
submittedModel = (SubmittedModel) getIntent().getSerializableExtra("value");
step1Binding.setSubmitData(submittedModel);
}
if (getIntent().hasExtra("edit")) {
isInEditMode = getIntent().getBooleanExtra("edit", false);
if (isInEditMode) {
step1Binding.backBtn.setVisibility(View.VISIBLE);
}
}
if (getIntent().hasExtra("viewName")){
viewName =getIntent().getStringExtra("viewName");
requestFocusOnSelectedView(); //Method to select views
}
.....
}
.......
void requestFocusOnSelectedView() {
//request focus
if (isInEditMode & viewName != null) {
switch (viewName) {
case ViewName.territory:
step1Binding.territoryList.requestFocus();
break;
case ViewName.ceName:
step1Binding.ceNameList.requestFocus();
break;
case ViewName.distributor:
step1Binding.distributorList.requestFocus();
break;
case ViewName.psr:
step1Binding.psrNameList.requestFocus();
break;
case ViewName.subRoute:
step1Binding.subRoute.requestFocus();
step1Binding.subRoute.setSelection(step1Binding.subRoute.getText().length());
break;
case ViewName.outlet:
step1Binding.outletName.requestFocus();
step1Binding.outletName.setSelection(step1Binding.outletName.getText().length());
break;
case ViewName.retailerName:
step1Binding.retailerName.requestFocus();
step1Binding.retailerName.setSelection(step1Binding.retailerName.getText().length());
break;
case ViewName.retailerMobile:
step1Binding.retailerMobile.requestFocus();
step1Binding.retailerMobile.setSelection(step1Binding.retailerMobile.getText().length());
break;
case ViewName.address:
step1Binding.address.requestFocus();
step1Binding.address.setSelection(step1Binding.address.getText().length());
break;
}
}
}
}
XML + 数据模型:代码工作正常
设置完所有数据后,但在请求焦点之前,请调用
binding.executePendingBindings();
这将强制设置视图值。
试试这个:
view.post(new Runnable() {
public void run() {
theView2Focus.requestFocus();
}
});
您的问题是您必须等到创建 UI。这正是你检测到的。