Dialog - the specified child already has a parent. You must first call removeView () on the parent parent

Question

After a check requiring the user to turn on the Internet services, and I try to click on the button, my application crashes with an error message

java.lang.IllegalStateException: The specified child already has a parent. You must call removeView() on the child parent first. 

On this line, it falls, I tried to do it, but did not decide absolutely

 if(alert.getContext() != null){ alert.show(); } 

This is the complete code.

 else if (id == R.id.xyz) { //startActivity(borrowIntent); AlertDialog.Builder alert = new AlertDialog.Builder(MainActivity.this); alert.setTitle("xyz"); input.setFilters(new InputFilter[] { // Maximum 2 characters. new InputFilter.LengthFilter(6), // Digits only. DigitsKeyListener.getInstance(), }); // Digits only & use numeric soft-keyboard. input.setKeyListener(DigitsKeyListener.getInstance()); input.setHint("xyz"); alert.setView(input); alert.setPositiveButton("Borrow", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { if(input.getText().length() == 0) { input.setError("xyz is required !"); } else { if(isNetworkAvailable()) { xyz( input.getText().toString()); }else{ //setContentView(R.layout.main); AlertDialog.Builder builder = new AlertDialog.Builder( MainActivity.this); builder.setCancelable(false); builder.setTitle("xyz"); builder.setMessage("Please enable wifi services"); builder.setInverseBackgroundForced(true); builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { startActivityForResult(new Intent(android.provider.Settings.ACTION_SETTINGS), 0); dialog.dismiss(); } }); AlertDialog alerts = builder.create(); alerts.show(); }//end of block } } }); alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { // Canceled. } }); if(alert.getContext() != null){ alert.show(); //crashes at this line } } 

Please, what am I missing?

Answer 1

The problem is in this line: alert.setView(input); You have added an input View that already has a parent . Create a new instance of input .

Answer 2

Put the next line

  final AlertDialog alertd = alert.create(); 

After

  AlertDialog.Builder alert = new AlertDialog.Builder(MainActivity.this);