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我试图显示一个对话框,该对话框从用户(用OK按钮)获取输入,但是我用一个yes或not开头,它不工作。这段代码崩溃了,我不知道为什么。任何帮助,将不胜感激 ;)。如果你能指导我进入提示对话框,那就更酷了; p。显示对话框片段
公共类TabFragment扩展片段{
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
new TestDialog().show(getFragmentManager(), "MyDialog");
}
}
//=============================================
public class TestDialog extends DialogFragment {
Context mContext;
public TestDialog() {
mContext = getActivity();
// Empty constructor required for DialogFragment
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(mContext);
alertDialogBuilder.setTitle("Really?");
alertDialogBuilder.setMessage("Are you sure?");
//null should be your on click listener
alertDialogBuilder.setPositiveButton("OK", null);
alertDialogBuilder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
return alertDialogBuilder.create();
}
发布stacktrace – Raghunandan
以下是官方Android文档中的DialogFragment实现示例:http://developer.android.com/guide/topics/ui/controls/pickers.html – shkschneider
AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder( mContext); 用getActivity()替换mContext。我没有实例化对象,所以mContext为null。 – user2241251