SearchView的基本使用

http://my.oschina.net/summerpxy/blog/175061

SearchView是android系统中内置的一个搜索框组件，可以很方便在添加在用户界面之上，但是也带来了一些问题，那就是searchview的UI是固定的，定制起来会很麻烦，如果对SearchView的要求比较高，完全可以采用button和EditText自己实现。这里先简单的说说SearchView的使用：

main.xml:

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< LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"      xmlns:tools = "http://schemas.android.com/tools"      android:layout_width = "match_parent"      android:layout_height = "match_parent"      android:orientation = "vertical"      tools:context = ".Main" >        < SearchView          android:id = "@+id/sv"          android:layout_width = "wrap_content"          android:layout_height = "wrap_content"          android:imeOptions = "actionGo" />   </ LinearLayout >

在显示suggestion的时候会用到下面的布局文件:mytextview.xml

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<? 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 = "50sp"      android:orientation = "vertical" >        < TextView          android:id = "@+id/textview"          android:layout_width = "match_parent"          android:layout_height = "wrap_content"          android:gravity = "center_vertical"          android:paddingLeft = "5sp"          android:textSize = "18sp" />   </ LinearLayout >

main.java:

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package com.app.main;   import java.lang.reflect.Field;   import android.app.Activity; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.os.Bundle; import android.view.View; import android.widget.ImageView; import android.widget.ListView; import android.widget.SearchView; import android.widget.SearchView.OnQueryTextListener; import android.widget.SimpleCursorAdapter; import android.widget.Toast;   public class Main extends Activity {        SearchView sv = null ;      ListView lv = null ;        @Override      protected void onCreate(Bundle savedInstanceState) {          super .onCreate(savedInstanceState);          setContentView(R.layout.main);            sv = (SearchView) this .findViewById(R.id.sv);            sv.setIconifiedByDefault( false );            sv.setSubmitButtonEnabled( true );            sv.setQueryHint( "查询" );             //通过反射，修改默认的样式，可以从android的search_view.xml中找到需要的组件                    try {              Field field = sv.getClass().getDeclaredField( "mSubmitButton" );                field.setAccessible( true );                ImageView iv = (ImageView) field.get(sv);                iv.setImageDrawable( this .getResources().getDrawable(                      R.drawable.pointer));              } catch (Exception e) {                e.printStackTrace();          }            Cursor cursor = this .getTestCursor();            @SuppressWarnings ( "deprecation" )          SimpleCursorAdapter adapter = new SimpleCursorAdapter( this ,                  R.layout.mytextview, cursor, new String[] { "tb_name" },                  new int [] { R.id.textview });            sv.setSuggestionsAdapter(adapter);            sv.setOnQueryTextListener( new OnQueryTextListener() {                @Override              public boolean onQueryTextChange(String str) {                    return false ;              }                @Override              public boolean onQueryTextSubmit(String str) {                    Toast.makeText(Main. this , str, Toast.LENGTH_SHORT).show();                    return false ;              }            });        }       //添加suggestion需要的数据      public Cursor getTestCursor() {            SQLiteDatabase db = SQLiteDatabase.openOrCreateDatabase(                  this .getFilesDir() + "/my.db3" , null );            Cursor cursor = null ;          try {                String insertSql = "insert into tb_test values (null,?,?)" ;                db.execSQL(insertSql, new Object[] { "aa" , 1 });                db.execSQL(insertSql, new Object[] { "ab" , 2 });                db.execSQL(insertSql, new Object[] { "ac" , 3 });                db.execSQL(insertSql, new Object[] { "ad" , 4 });                db.execSQL(insertSql, new Object[] { "ae" , 5 });                String querySql = "select * from tb_test" ;                cursor = db.rawQuery(querySql, null );            } catch (Exception e) {                String sql = "create table tb_test (_id integer primary key autoincrement,tb_name varchar(20),tb_age integer)" ;                db.execSQL(sql);                String insertSql = "insert into tb_test values (null,?,?)" ;                db.execSQL(insertSql, new Object[] { "aa" , 1 });                db.execSQL(insertSql, new Object[] { "ab" , 2 });                db.execSQL(insertSql, new Object[] { "ac" , 3 });                db.execSQL(insertSql, new Object[] { "ad" , 4 });                db.execSQL(insertSql, new Object[] { "ae" , 5 });                String querySql = "select * from tb_test" ;                cursor = db.rawQuery(querySql, null );          }            return cursor;      }   }

实现的效果如下：