Question

如何在我的Android应用中添加搜索功能？我有一个listview，我想在其中添加搜索功能，我有代码，但我不知道如何正确地与我的应用程序集成这是代码 -

inputSearch.addTextChangedListener(new TextWatcher() {

@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
    // When user changed the Text
    MainActivity.this.adapter.getFilter().filter(cs);   
}

@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
        int arg3) {
    // TODO Auto-generated method stub

}

 @Override
public void afterTextChanged(Editable arg0) {
    // TODO Auto-generated method stub                          
}
});

这是我的java文件

package com.Example.app;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class MainActivity extends Activity {

private ListView list1;

private String array[] = { "Iphone", "Tutorials", "Gallery", "Android",

"item 1", "item 2", "item3", "item 4", "item 1", "item 2", "item3", "item 4","item 1",        "item 2", "item3", "item 4"};


   @Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

list1 = (ListView) findViewById(R.id.ListView01);

// By using setAdpater method in listview we an add string array in

// list.

list1.setAdapter(new ArrayAdapter(this,

android.R.layout.simple_list_item_1, array));

list1.setOnItemClickListener(new OnItemClickListener() {

public void onItemClick(AdapterView<?> parent, View view,
        int position, long id) {
     if (position == 1)
    {
      Intent myIntent = new Intent(getApplicationContext(),Baba.class);
      startActivity(myIntent);
    }
  }
});
}

}

main.xml中

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:stackFromBottom="true">
<EditText 
android:id="@+id/inputSearch"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:hint="Search"
android:inputType="textVisiblePassword">
</EditText>
<ListView
    android:id="@+id/ListView01"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:scrollbarSize="5dp" 

    >

</ListView>

</LinearLayout>

Answer 1

尝试以下

EditText inputSearch; 
ArrayAdapter<String> adapter;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
inputSearch = (EditText) findViewById(R.id.inputSearch); // initialize edittext 
list1 = (ListView) findViewById(R.id.ListView01);
adapter =new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, array));
list1.setAdapter(adapter);
inputSearch.addTextChangedListener(new TextWatcher() {

@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
    // When user changed the Text
    MainActivity.this.adapter.getFilter().filter(cs);   
}

@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
        int arg3) {
    // TODO Auto-generated method stub

}

 @Override
public void afterTextChanged(Editable arg0) {
    // TODO Auto-generated method stub                          
}
});
list1.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
        int position, long id) {
     if (position == 1)
    {
      Intent myIntent = new Intent(getApplicationContext(),Baba.class);
      startActivity(myIntent);
    }
  }
});
}

在onCreate初始化editText inputSearch。

inputSearch = (EditText) findViewById(R.id.inputSearch); // initialize edittext

初始化适配器

adapter =new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, array));

设置适配器操作列表视图

list1.setAdapter(adapter);

这是搜索发生的地方

 @Override
public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
    // When user changed the Text
    MainActivity.this.adapter.getFilter().filter(cs);   // filter based on input
}

Answer 2

由于您使用的是Android的数组适配器，因此您也可以使用其getFilter()方法。所以你只需要改变代码中的小东西。

而不是像这样设置数组适配器

list1.setAdapter(new ArrayAdapter(this,android.R.layout.simple_list_item_1, array));

在方法

之外创建一个私有变量

private ArrayAdapter adapter;

然后初始化并设置它

adapter = new ArrayAdapter(this,android.R.layout.simple_list_item_1, array);
list1.setAdapter(adapter);

现在，文本更改方法可以毫无问题地调用MainActivity.this.adapter.getFilter().filter(cs);

如何在ListView中添加搜索功能

2 个答案: