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我在從對話框獲取數據到調用活動時遇到問題。一直遵循Android文檔，但沒有運氣。我只想捕獲某人在我的對話框的編輯文本框中輸入的字符串。這是我的設置。Android將參數從對話框傳遞到調用活動
public class CrossoverMainActivity extends Activity implements CrossoverSaveDialog.NoticeDialogListener {
final CrossoverSaveDialog dialog_save = new CrossoverSaveDialog();
@Override
public void onDialogPositiveClick(DialogFragment dialog) {
// User touched the dialog's positive button
}
@Override
public void onDialogNegativeClick(DialogFragment dialog) {
// User touched the dialog's negative button
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
if (id == R.id.action_save) {
dialog_save.show(getFragmentManager(), "Dialog_save");
return true;
}
if (id == R.id.action_delete) {
CrossoverDeleteDialog dialog_delete = new CrossoverDeleteDialog();
//Fragment fragment = new Fragment();
dialog_delete.show(getFragmentManager(), "Dialog_delete");
return true;
}
return super.onOptionsItemSelected(item);
}
}
然後，在另一個java文件，我有我的對話框：
public class CrossoverSaveDialog extends DialogFragment {
public interface NoticeDialogListener {
void onDialogPositiveClick(DialogFragment dialog);
void onDialogNegativeClick(DialogFragment dialog);
}
// Use this instance of the interface to deliver action events
NoticeDialogListener mListener;
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
LayoutInflater inflater = getActivity().getLayoutInflater();
View dialogSave = inflater.inflate(R.layout.crossover_save_dialog, null);
builder.setView(dialogSave);
builder.setPositiveButton(R.string.dialog_save, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
mListener.onDialogPositiveClick(CrossoverSaveDialog.this);
}
})
.setNegativeButton(R.string.dialog_cancel, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
mListener.onDialogNegativeClick(CrossoverSaveDialog.this);
}
});
return builder.create();
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
// Verify that the host activity implements the callback interface
try {
// Instantiate the NoticeDialogListener so we can send events to the host
mListener = (NoticeDialogListener) activity;
} catch (ClassCastException e) {
// The activity doesn't implement the interface, throw exception
throw new ClassCastException(activity.toString()
+ " must implement NoticeDialogListener");
}
}
}
這裏是我的兩個問題：
我得到的問題是，編譯器抱怨說我沒有實現我的界面的方法......我似乎是這樣做的。有什麼我在這裏失蹤？
我必須這樣做第二個對話框，它不同於我在這裏顯示的對話框。但是，我會以同樣的方式去做。我只是查看回調方法的對話框來確定哪個對話框正在使用？這樣我就可以處理每個對話的邏輯。或者，我是否應該在每個對話框中使用一個獨立的接口，並使用它們的每一個獨特方法，並且只實現其中的每一個？