我在各种论坛上搜索了正确的答案,但对我来说没有任何作用。目前我在私人课程MyDiary中有这段代码:
ListView list = new ListView(Monday.this);
list.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
new EditListItemDialog(view.getContext()).show();
return true;
}
});
它不会返回错误,但EditListItemDialog无法打开。我在这里缺少什么?
修改
EditListItemDialog的代码:
package com.example.classorganizer;
import android.app.Dialog;
import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
class EditListItemDialog extends Dialog implements View.OnClickListener {
private View editText;
public EditListItemDialog(Context context) {
super(context);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.edit_text_dialog);//here is your xml with EditText and 'Ok' and 'Cancel' buttons
View btnOk = findViewById(R.id.button_ok);
editText = findViewById(R.id.edit_text);
btnOk.setOnClickListener(this);
}
@Override
public void onClick(View v) {
((TextView) editText).getText().toString();//here is your updated(or not updated) text
dismiss();
}
}
XML文件:
<ListView
android:layout_width="fill_parent"
android:gravity="center"
android:layout_height="fill_parent"
android:id="@android:id/list"
android:longClickable="true"
>
</ListView>
创建行:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:layout_alignLeft="@+id/name"
android:layout_below="@+id/name"
xmlns:android="http://schemas.android.com/apk/res/android"
android:padding="0dip">
<TextView android:textSize="16dip"
android:layout_width="wrap_content"
android:layout_height="29dp"
android:layout_marginTop="0dp"
android:id="@+id/name"
android:layout_marginRight="4dp"
android:text="Diary Title"
android:textStyle="bold"
android:longClickable="true" />
</RelativeLayout>
答案 0 :(得分:0)
假设您使用ListActivity
,则应更改以下行(来自您的第一个代码块)...
ListView list = new ListView(Monday.this);
......待......
ListView list = getListView();
然后您可以为其设置监听器。