android v7.widget.SearchView的使用，,ok，来看下Search
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android v7.widget.SearchView的使用，,ok，来看下Search
我们的项目中很多的搜索功能都是通过SearchView来实现的，因为这个控件给我们封装了很多功能，也正因为这个，SearchView很多样式不好控制，比如输入框的背景图片，输入框的字体颜色等等！
不过如果看过源码的朋友就能轻松实现这些。ok，来看下SearchView的使用步骤
1、定义 menu.xml
<menu xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" tools:context=".LauncherActivity"> <item android:id="@+id/search_contact" android:title="搜索" app:showAsAction="always" app:actionViewClass="android.support.v7.widget.SearchView"/> </menu>
这个没什么可讲的，就和其他 menu 菜单项一样，唯一不同的是加入了app:actionViewClass=”android.support.v7.widget.SearchView”
2、获取 SearchView
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_search, menu);
final MenuItem item = menu.findItem(R.id.search_contact);
mSearchView = (SearchView) MenuItemCompat.getActionView(item);
return true;
}通过MenuItem的兼容版MenuItemCompat获取SearchView；获取了SearchView，我们就能设置其相应的属性，比如我想让它一开始就处于显示SearchView的状态
mSearchView.setIconified(false);
而我不想让它隐藏SearchView，则可以
mSearchView.setIconifiedByDefault(false);
mSearchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() { @Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
mSearchText = newText ;
doSearch();
return true;
}
});监听输入框变化和执行搜索操作后的回掉，所以我们可以在这里做相应的搜索功能。还有几个方法用的比较少，这里就不讲了，不过这些方法中确没有获取输入框的方法，无法获取输入框，那么我们就不能对其风格进行修改，不能改变输入框的背景，字体等等，这样看起来就和整个 app 的风格很不协调，而且每个系统显示的还不一样，这样是不应许的！
3、修改 SearchView 的样式
在第二点的时候，我们已经获取到了SearchView，可以通过源码找到其资源文件，然后通过 id 来获取相应的 view，比如获取输入框
mEdit = (SearchView.SearchAutoComplete) mSearchView.findViewById(R.id.search_src_text);
SearchView.SearchAutoComplete 其实就是输入框，它是继承之 EditView；
最后来看一个具体实例额
代码：
private void setSearchView() {
final float density = getResources().getDisplayMetrics().density;
mSearchView.setIconified(false);
mSearchView.setIconifiedByDefault(false);
final int closeImgId = context.getResources().getIdentifier("search_close_btn", "id", getPackageName());
ImageView closeImg = (ImageView) mSearchView.findViewById(closeImgId);
if (closeImg != null) {
LinearLayout.LayoutParams paramsImg = (LinearLayout.LayoutParams) closeImg.getLayoutParams();
paramsImg.topMargin = (int) (-2 * density);
closeImg.setImageResource(R.mipmap.clear_img);
closeImg.setLayoutParams(paramsImg);
}
final int editViewId = context.getResources().getIdentifier("search_src_text", "id", getPackageName());
mEdit = (SearchView.SearchAutoComplete) mSearchView.findViewById(editViewId);
if (mEdit != null) {
mEdit.setHintTextColor(getResources().getColor(R.color.color_hint));
mEdit.setTextColor(getResources().getColor(R.color.color_white));
mEdit.setTextSize(TypedValue.COMPLEX_UNIT_SP, 16);
mEdit.setHint(String.format(getResources().getString(R.string.search_hint_tip), MemoryData.departmentList.get(mPosition).getMembers().size()));
}
LinearLayout rootView = (LinearLayout) mSearchView.findViewById(R.id.search_bar);
rootView.setBackgroundResource(R.drawable.edit_bg);
rootView.setClickable(true);
LinearLayout editLayout = (LinearLayout) mSearchView.findViewById(R.id.search_plate);
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) editLayout.getLayoutParams();
LinearLayout tipLayout = (LinearLayout) mSearchView.findViewById(R.id.search_edit_frame);
LinearLayout.LayoutParams tipParams = (LinearLayout.LayoutParams) tipLayout.getLayoutParams();
tipParams.leftMargin = 0;
tipParams.rightMargin = 0;
tipLayout.setLayoutParams(tipParams);
ImageView icTip = (ImageView) mSearchView.findViewById(R.id.search_mag_icon);
icTip.setImageResource(R.mipmap.ic_search_tip);
params.topMargin = (int) (4 * density);
editLayout.setLayoutParams(params);
mSearchView.setSubmitButtonEnabled(false);
mSearchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
mSearchText = newText ;
doSearch();
return true;
}
});
}这里还用了另外一种方法获取 idcloseImgId = context.getResources().getIdentifier(“search_close_btn”, “id”, getPackageName())
其实直接用 R.id.search_close_btn是一样的，没有区别！
总结：SearchView 的使用其实很简单，但是有的时候我们想要修改一点点样式却很难下手，这里重点就是说明如何获取每个 child view，通过 view 来改变其样式，核心代码也就是
mEdit = (SearchView.SearchAutoComplete) mSearchView.findViewById(R.id.search_src_text);
最后附上资源文件abc_search_view.xml
<?xml version="1.0" encoding="utf-8"?> <!-- /* * Copyright (C) 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ --> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/search_bar" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal"> <!-- This is actually used for the badge icon *or* the badge label (or neither) --> <TextView android:id="@+id/search_badge" android:layout_width="wrap_content" android:layout_height="match_parent" android:gravity="center_vertical" android:layout_marginBottom="2dip" android:drawablePadding="0dip" android:textAppearance="?android:attr/textAppearanceMedium" android:textColor="?android:attr/textColorPrimary" android:visibility="gone" /> <android.support.v7.internal.widget.TintImageView android:id="@+id/search_button" style="?attr/actionButtonStyle" android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_gravity="center_vertical" android:focusable="true" android:contentDescription="@string/abc_searchview_description_search" /> <LinearLayout android:id="@+id/search_edit_frame" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:layout_gravity="center_vertical" android:layout_marginTop="4dip" android:layout_marginBottom="4dip" android:layout_marginLeft="8dip" android:layout_marginRight="8dip" android:orientation="horizontal" android:layoutDirection="locale"> <android.support.v7.internal.widget.TintImageView android:id="@+id/search_mag_icon" android:layout_width="@dimen/abc_dropdownitem_icon_width" android:layout_height="wrap_content" android:scaleType="centerInside" android:layout_gravity="center_vertical" android:visibility="gone" style="@style/RtlOverlay.Widget.AppCompat.SearchView.MagIcon" /> <!-- Inner layout contains the app icon, button(s) and EditText --> <LinearLayout android:id="@+id/search_plate" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:layout_gravity="center_vertical" android:orientation="horizontal"> <view class="android.support.v7.widget.SearchView$SearchAutoComplete" android:id="@+id/search_src_text" android:layout_height="36dip" android:layout_width="0dp" android:layout_weight="1" android:minWidth="@dimen/abc_search_view_text_min_width" android:layout_gravity="bottom" android:paddingLeft="@dimen/abc_dropdownitem_text_padding_left" android:paddingRight="@dimen/abc_dropdownitem_text_padding_right" android:singleLine="true" android:ellipsize="end" android:background="@null" android:inputType="text|textAutoComplete|textNoSuggestions" android:imeOptions="actionSearch" android:dropDownHeight="wrap_content" android:dropDownAnchor="@id/search_edit_frame" android:dropDownVerticalOffset="0dip" android:dropDownHorizontalOffset="0dip" /> <android.support.v7.internal.widget.TintImageView android:id="@+id/search_close_btn" android:layout_width="wrap_content" android:layout_height="match_parent" android:paddingLeft="8dip" android:paddingRight="8dip" android:layout_gravity="center_vertical" android:background="?attr/selectableItemBackgroundBorderless" android:focusable="true" android:contentDescription="@string/abc_searchview_description_clear" /> </LinearLayout> <LinearLayout android:id="@+id/submit_area" android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="match_parent"> <android.support.v7.internal.widget.TintImageView android:id="@+id/search_go_btn" android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_gravity="center_vertical" android:paddingLeft="16dip" android:paddingRight="16dip" android:background="?attr/selectableItemBackgroundBorderless" android:visibility="gone" android:focusable="true" android:contentDescription="@string/abc_searchview_description_submit" /> <android.support.v7.internal.widget.TintImageView android:id="@+id/search_voice_btn" android:layout_width="wrap_content" android:layout_height="match_parent" android:layout_gravity="center_vertical" android:paddingLeft="16dip" android:paddingRight="16dip" android:background="?attr/selectableItemBackgroundBorderless" android:visibility="gone" android:focusable="true" android:contentDescription="@string/abc_searchview_description_voice" /> </LinearLayout> </LinearLayout> </LinearLayout>
作者：不知道什么名字
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