缩放列表视图 [英] Zoom the listview

问题描述

我有一个包含一个TextView一个ListView，我需要放大按钮点击这个TextView的，但我不能做到这一点，我什么都试过覆盖simplecursor适配器和覆盖getview（）方法，但不能缩放在点击按钮的TextView，按钮列表视图外，我的code是：

I have a listview containing a textview and I need to zoom this textview on button click but I am not able to do it, I tried everything to override the simplecursor adapter and override the getview() method but couldn't zoom the textview on button click, the button is outside the listview and my code is:

这是ListView的布局：

this is the listview layout:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal" >

  <CheckBox
 android:id="@+id/bt_rating"
 android:focusable="false"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_gravity="center_vertical"
 android:button="@android:drawable/btn_star"
 android:onClick="onclick"/>

<TextView
android:id="@+id/text1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textSize="@dimen/FontSizeInListView"
android:gravity="right"
 />
</LinearLayout>

修改

adapter.setViewBinder(new SimpleCursorAdapter.ViewBinder(){
                Binds the Cursor column defined by the specified index to the specified view 
        public boolean setViewValue(View view, Cursor cursor, int columnIndex){


            if(view.getId() == R.id.text1){
            tv=(TextView)view;          
            }}**

这样一来我得到的TextView，但确保只有建立的最后一个将被渲染和缩放我 tv.settextsize（..）
但只有页面上创建最后的TextView会改变，因为我只有一个我这样怎么能得到所有的textviews并不仅仅是创建的最后一个？

so that way I get the textview but sure only the last one created will be rendered and in the zoom I do tv.settextsize(..) but only the last textview created on page will change because I only have the id of that one so how can I get all the textviews and not just the last one created?

推荐答案

它的工作我做的是：

adapter =new SimpleCursorAdapter(this,R.layout.rating,cu,new String[]{"Title","Fav"}, new int[]{R.id.text1,R.id.bt_rating},CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);   
          //added in last update
            adapter.setViewBinder(new SimpleCursorAdapter.ViewBinder(){
                   /** Binds the Cursor column defined by the specified index to the specified view */
                public boolean setViewValue(View view, Cursor cursor, int columnIndex){


                    if(view.getId() == R.id.text1){
                    tv=(TextView)view;     
                    tv.setTextSize(SizeOfTextInListView);
                    }

}）;

而在变焦按钮：

 //zoom in button click
        final Button zoom_in_btn = (Button) findViewById(R.id.button_zoom_in);
        zoom_in_btn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
            if(Zoom_counter<10){
                  SizeOfTextInListView= SizeOfTextInListView+Zoom_In_Out_value;
                  adapter.notifyDataSetChanged();
                        Zoom_counter++;


            }
            } 
        });

它完美地工作。

这篇关于缩放列表视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！