今天很简单的问题。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();
}
}
是的,按钮存在,不,我没有拼错它的参考。是的,我已经清理了项目并重新启动了 Eclipse。当我清楚地调用 setContentView() 时,按钮如何不与视图关联?我敢肯定这很简单,我以前从未使用过对话框,一般来说是 GUI 新手。尤其是安卓