我有一个对话框,应该在对话框中填写一些详细信息EditText
。如果在编辑文本为空时单击肯定按钮,Snackbar
则会显示带有消息的,并且对话框将关闭。但是,当我再次打开对话框时,该应用程序会发疯并给出:java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child's parent first
错误。
这是我扩大视图的方式:
LayoutInflater inflater = this.getLayoutInflater();
addVenueDialog = inflater.inflate(R.layout.add_venue_dialog, null);
这是打开对话框并检查编辑文本是否为空的背后的Java代码:
case R.id.nav_add_venue:
if (dialog == null) {
LayoutInflater inflater = this.getLayoutInflater();
View addVenueDialog = inflater.inflate(R.layout.add_venue_dialog, null);
vName = (EditText) addVenueDialog.findViewById(R.id.vName);
vAddress = (EditText) addVenueDialog.findViewById(R.id.vAddress);
AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("Title");
builder.setView(addVenueDialog);
builder.setPositiveButton("Add", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
if (isNetworkAvailable()) {
if (vName.getText().toString().isEmpty()) {
Snackbar snackbar = Snackbar
.make(coordinatorLayout, "V name cannot be empty", Snackbar.LENGTH_SHORT);
snackbar.show();
} else if (vAddress.getText().toString().isEmpty()) {
Snackbar snackbar = Snackbar
.make(coordinatorLayout, "V address cannot be empty", Snackbar.LENGTH_SHORT);
snackbar.show();
} else {
mDatabase.child("vs").child(user.getUid()).child("V name").setValue(vName.getText().toString());
mDatabase.child("vs").child(user.getUid()).child("V address").setValue(vAddress.getText().toString());
}
} else {
Snackbar snackbar = Snackbar
.make(coordinatorLayout, "No internet connection", Snackbar.LENGTH_SHORT);
snackbar.show();
}
}
});
dialog = builder.create();
}
dialog.show();
break;
我不知道为什么在关闭对话框后再次打开对话框时该应用程序崩溃。
请告诉我。
一个简单的解决方案是保留AlertDialog
并重新使用它的全局实例:
//global
private AlertDialog dialog;
现在在切换情况下:
case R.id.nav_add_venue:
if(dialog == null) {
LayoutInflater inflater = this.getLayoutInflater();
View addVenueDialog = inflater.inflate(R.layout.add_venue_dialog, null);
builder.setView(addVenueDialog);
final EditText vName = (EditText) addVenueDialog.findViewById(R.id.vName);
final EditText vAddress = (EditText) addVenueDialog.findViewById(R.id.vAddress);
// Other code //
dialog = builder.create();
}
dialog.show();
break;
记住dismiss
使用对话onDestroy
方法以避免内存泄漏:
public void onDestroy() {
super.onDestroy();
if(dialog != null) {
dialog.dismiss();
}
}
本文收集自互联网,转载请注明来源。
如有侵权,请联系[email protected] 删除。
我来说两句