SearchView的基本使用

   SearchView是android系統中內置的一個搜索框組件，能夠很方便在添加在用戶界面之上，可是也帶來了一些問題，那就是searchview的UI是固定的，定製起來會很麻煩，若是對SearchView的要求比較高，徹底能夠採用button和EditText本身實現。這裏先簡單的說說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>

在顯示suggestion的時候會用到下面的佈局文件: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("查詢");

         //經過反射，修改默認的樣式，能夠從android的search_view.xml中找到須要的組件
		
		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須要的數據
	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;
	}

}

實現的效果以下：