android控制項彈出
❶ android Spinner控制項 選擇後為什麼會自動彈到界面頂部
我今天也遇到這個問題了
開始以為當spinner在scrollview時 存在android版本兼容問題
於是改成了popupwindow 比spinner麻煩好多 頁面有多個EditText用於彈出popupwindow展示不同的下拉數據 點擊TextView要記錄當前的EditText當點擊popupwindow的列表項關閉popupwindow時要取到數據手動調用之前記錄的EditText的setttext方法
而用spinner 這一切都是自動的
前面都是廢話 結果用popupwindow實現完後還是一樣 會自動滾動到頂部 這時才仔細分析問題原因
原來是在點擊EditText(設置了clickable=true;focusable=false)彈出spinner/popupwindow時焦點在頁面外的EditText上 ,於是關閉spinner/popupwindow時頁面自動滾動到獲取焦點的EditText
解決方法很簡單 在focusable=false的EditText的點擊事件里去掉焦點
if (getCurrentFocus()!=null) {
getCurrentFocus().clearFocus();
}
❷ Android實現一個彈出框.
AlertDialog正解。
Builder builder = new Builder(this);
builder.setTitle("");
builder.setIcon(R.drawable.icon);
builder.setView(View);//自己定義一個View，就可以放進去
builder.show();
或者用popupwindow
然後為popupwindow的背景設置透明度
❸ android開發中獲取選中文字以及彈出框
只需要在Textview中增加android:textIsSelectable="true"即可長按彈出復制，如果要彈出對話框，那就要用Dialog，dialog的用法如下：
Android中，在Dialog中增加EditText需要使用view控制項，也可參考附件源代碼。
具體實現代碼：
1.創建對象框
AlertDialog.Builder builder = new Builder(context);
builder.setTitle("請輸入"); //設置對話框標題
builder.setIcon(android.R.drawable.btn_star); //設置對話框標題前的圖標
2.創建EditText輸入框
final EditText edit = new EditText(context);
3.將輸入框賦值給Dialog,並增加確定取消按鍵
builder.setView(edit);
builder.setPositiveButton("確認", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(context, "你輸入的是: " + edit.getText().toString(), Toast.LENGTH_SHORT).show();
}
});
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Toast.makeText(context, "你點了取消", Toast.LENGTH_SHORT).show();
}
});
4.設置常用api，並show彈出
builder.setCancelable(true); //設置按鈕是否可以按返回鍵取消,false則不可以取消
AlertDialog dialog = builder.create(); //創建對話框
dialog.setCanceledOnTouchOutside(true); //設置彈出框失去焦點是否隱藏,即點擊屏蔽其它地方是否隱藏
dialog.show();
❹ android listvew 控制項如何點擊彈出上下文菜單
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android ="http://schemas.android.com/apk/res/android"
android:orientation ="vertical"
android:layout_width ="fill_parent"
android:layout_height ="fill_parent" >
<TextView
android:layout_width ="fill_parent"
android:layout_height ="wrap_content"
android:text ="Long-Press on of the Items in the list." />
<ListView android:id ="@+id/list_favorites"
android:layout_width ="fill_parent"
android:layout_height ="fill_parent" />
</LinearLayout>
代碼：
package com.pop.projects;
import java.util.ArrayList;
import android.app.Activity;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.View.OnCreateContextMenuListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
public class MainActivity extends Activity {
// ===========================================================
// Final Fields
// ===========================================================
protected static final int CONTEXTMENU_DELETEITEM = 0;
// ===========================================================
// Fields
// ===========================================================
protected ListView mFavList;
protected ArrayList<Favorite> fakeFavs = new ArrayList<Favorite>();
// ===========================================================
// "Constructors"
// ===========================================================
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
/* Add some items to the list the listview will be showing. */
fakeFavs.add(new Favorite("John", "nice guy"));
fakeFavs.add(new Favorite("Yasmin", "hot girl"));
fakeFavs.add(new Favorite("Jack", "cool guy"));
this.mFavList = (ListView) this.findViewById(R.id.list_favorites);
initListView();
}
private void refreshFavListItems() {
mFavList.setAdapter(new ArrayAdapter<Favorite>(this,
android.R.layout.simple_list_item_1, fakeFavs));
}
private void initListView() {
/* Loads the items to the ListView. */
refreshFavListItems();
/* Add Context-Menu listener to the ListView. */
mFavList.(new OnCreateContextMenuListener() {
public void onCreateContextMenu(ContextMenu conMenu, View view , ContextMenuInfo info) {
conMenu.setHeaderTitle("ContextMenu");
conMenu.add(0, 0, 0, "Delete this favorite!");
/* Add as many context-menu-options as you want to. */
}
});
mFavList.setOnItemClickListener(new OnItemClickListener()
{
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
Toast.makeText(MainActivity.this, "111111111111", 200).show() ;
}
});
}
// ===========================================================
// Methods from SuperClass/Interfaces
// ===========================================================
@Override
public boolean onContextItemSelected(MenuItem aItem) {
ContextMenuInfo menuInfo = (ContextMenuInfo) aItem.getMenuInfo();
/* Switch on the ID of the item, to get what the user selected. */
switch (aItem.getItemId()) {
case CONTEXTMENU_DELETEITEM:
/* Get the selected item out of the Adapter by its position. */
Favorite favContexted = (Favorite) mFavList.getAdapter()
.getItem(0);
/* Remove it from the list.*/
fakeFavs.remove(favContexted);
refreshFavListItems();
return true; /* true means: "we handled the event". */
}
return false;
}
// ===========================================================
// Inner and Anonymous Classes
// ===========================================================
/** Small class holding some basic */
protected class Favorite {
protected String name;
protected String kindness;
protected Favorite(String name, String kindness) {
this.name = name;
this.kindness = kindness;
}
/** The ListView is going to display the toString() return-value! */
public String toString() {
return name + " (" + kindness + ")";
}
public boolean equals(Object o) {
return o instanceof Favorite && ((Favorite) o).name.compareTo(name) == 0;
}
}
}
❺ android怎麼在自定義控制項中彈出對話框!!!
直接new一個AlertDialog就可以了啊
AlertDialog.Builder builder = new AlertDialog.Builder(context);
builder.setTitle("111");
builder.setMessage("222");
final AlertDialog dialog = builder.create();
dialog.show();
❻ android的這種彈出菜單（窗口）怎麼實現
可以用popupWindow
public class PopUpActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
LayoutInflater inflater = LayoutInflater.from(this);
// 引入窗口配置文件
View view = inflater.inflate(R.layout.main2, null);
// 創建PopupWindow對象
final PopupWindow pop = new PopupWindow(view, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT, false);
Button btn = (Button) findViewById(R.id.btn);
// 需要設置一下此參數，點擊外邊可消失
pop.setBackgroundDrawable(new BitmapDrawable());
//設置點擊窗口外邊窗口消失
pop.setOutsideTouchable(true);
// 設置此參數獲得焦點，否則無法點擊
pop.setFocusable(true);
}
}
popupWindow.showAsDropDown(v);讓它出現在上方標題欄的下方
布局裡可以寫成listview，也可以寫成死布局
還有就是ActionBar，但個人感覺ActionBar沒有popupWindow靈活，反正我一般這種情況都會用popupWindow，看個人愛好
❼ android微信的評論彈出框用什麼控制項做的
實現對一個主題評論並顯示評論列表,首先想到的是需要使用ListView控制項,
下面是layout下的xml布局文件:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/list_selector"
android:orientation="horizontal"
android:padding="5dip" >
<LinearLayout
android:id="@+id/thumbnail"
android:layout_width="120dip"
android:layout_height="120dip"
android:layout_alignParentLeft="true"
android:layout_marginRight="5dip"
android:background="@drawable/image_bg"
android:padding="1dip" >
<ImageView
android:id="@+id/group_image"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerInside"
android:src="@drawable/right" />
</LinearLayout>
<TextView
android:id="@+id/group_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/thumbnail"
android:layout_toRightOf="@+id/thumbnail"
android:text="測試朋友圈評論功能"
android:textColor="#040404"
android:textSize="15sp"
android:textStyle="bold"
android:typeface="sans" />
<TextView
android:id="@+id/group_content"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/thumbnail"
android:text="狗狗見到蟒，沖過去照頭上就舔"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#343434"
android:textSize="12sp" />
<ImageView
android:id="@+id/group_discuss_popup"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="@+id/group_content"
android:layout_below="@+id/group_content"
android:background="@drawable/coment_pressed" />
<TextView
android:id="@+id/group_createtime"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/TextView09"
android:layout_toLeftOf="@+id/group_discuss_popup"
android:gravity="right"
android:text="2014-08-24 15:45"
android:textColor="#10bcc9"
android:textSize="12sp"
android:textStyle="bold" />
<RelativeLayout
android:id="@+id/rl_bottom"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true" >
<Button
android:id="@+id/group_discuss_submit"
android:layout_width="60dp"
android:layout_height="40dp"
android:layout_alignParentRight="true"
android:layout_centerVertical="true"
android:layout_marginRight="10dp"
android:background="@drawable/chat_send_button_bg"
android:onClick="discussSubmit"
android:text="發送"
android:textSize="20sp" />
<EditText
android:id="@+id/group_discuss"
android:layout_width="fill_parent"
android:layout_height="40dp"
android:layout_centerVertical="true"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_toLeftOf="@id/group_discuss_submit"
android:hint="評論"
android:singleLine="true"
android:textSize="18sp" >
<requestFocus />
</EditText>
</RelativeLayout>
<ListView
android:id="@+id/group_discuss_list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="@+id/group_discuss_popup"
android:layout_marginTop="14dp"
android:divider="#b5b5b5"
android:dividerHeight="1dp"
android:listSelector="@drawable/list_selector" />
<TextView
android:id="@+id/TextView09"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/thumbnail"
android:layout_marginBottom="40dp"
android:layout_toRightOf="@+id/thumbnail"
android:text="時間:"
android:textColor="#040404"
android:textSize="12sp"
android:textStyle="bold"
android:typeface="sans" />
</RelativeLayout>
❽ android中如何在某個控制項彈出菜單
你這是 menu 吧， 就是在 activity中有個
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
} 這個函數中就是 調用顯示了R。menu。main菜單的類容出來，並且原屏幕會變暗
❾ 請問android下怎麼實現長按某控制項彈出選項框的效果
試著重寫View,系統自帶控制項是沒有點擊其他地方取消的,肯定是要重寫的,單純用系統控制項是不能實現的.點擊彈出View後,背景變黑可以自己手動實現，然後在父控制項內寫觸摸事件,當點擊父控制項後,隱藏彈出層,然後將屏幕顏色恢復即可