[英]Android custom dialog with button
Very simple question today. 今天的问题很简单。 When I attempt to retreive a reference to the button on the dialog I always receive a null value. 当我尝试检索对对话框上按钮的引用时,我总是收到一个空值。
@Override
public void onRestart() {
super.onRestart();
//must prompt with modal dialog for pin
Dialog dialog = new Dialog(this);
dialog.setOwnerActivity(this);
dialog.setCancelable(false);
//check pin
dialog.setCanceledOnTouchOutside(false);
//set view to enterpin XML screen
dialog.setContentView(R.layout.enterpin);
//register button
//show dialog
dialog.show();
//listen for button being clicked
Button button = (Button) findViewById(R.id.pinlogin);
button.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v){
EditText editText = (EditText) findViewById(R.id.enterpin);
int enteredPin = Integer.parseInt(editText.getText().toString());
SharedPreferences sharedP = getPreferences(MODE_PRIVATE);
int temp = sharedP.getInt("pin", 0);
if(enteredPin==temp){
pinCheck = true;
}else{
pinCheck = false;
}
}
});
if(pinCheck){
dialog.dismiss();
}
}
Yes the button exists, no I did not mispell it's reference. 是的,该按钮存在,不,我没有拼错它的引用。 Yes I've cleaned the project and restarted eclipse. 是的,我已经清理了项目并重新启动了Eclipse。 How can the button not be associated with the view when i clearly called setContentView()? 当我明确调用setContentView()时,按钮如何不与视图关联? I'm sure it's simple, I've never used dialogs before, new to GUI in general. 我敢肯定这很简单,我以前从未使用过对话框,这是GUI的新功能。 Especially Android 尤其是Android
Button button = (Button)dialog.findViewById(R.id.pinlogin);
^^^^^^
When you show Dialog ,you have to give refrences of dialog
.because without it , Button refrences from main.xml
.i mean from main view setContentView(R.layout.main);
当显示Dialog时,您必须提供refrences of dialog
引用。因为没有它,则Button refrences from main.xml
.i是主视图setContentView(R.layout.main);
. 。
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