SearchView的基本使用

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:

<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

<?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:

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：