隐藏一个Android ListView，直到输入搜索字符串 [英] Hide an android ListView until search string is entered

问题描述

我已按照本教程 http://www.androidpeople.com/android-listview-searchbox-sort-items ，而我在列表上进行搜索.我唯一想做的更改是最初隐藏列表视图，并且结果仅在用户开始键入时才会显示.有办法吗?

I've followed this tutorial http://www.androidpeople.com/android-listview-searchbox-sort-items and I have the search working on the list. The only change I'd like to make is to have the list view hidden initially and the results only appearing when the user starts typing. Is there a way to do this?

添加了代码.

package com.example.testapp;

import java.util.ArrayList;

import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.Menu;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;

public class MainActivity extends Activity {
/** Called when the activity is first created. */
private ListView lv1;
private EditText ed;
private String lv_arr[]=  {"Android","Cupcake","Donut","Eclairs","AndroidPeople","Froyo",};
private ArrayList<String> arr_sort= new ArrayList<String>();
int textlength=0;
@Override
public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
setContentView(R.layout.activity_main);
lv1=(ListView)findViewById(R.id.ListView);
ed=(EditText)findViewById(R.id.EditText01);
// By using setAdpater method in listview we an add string array in list.
lv1.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 ,   lv_arr));
ed.addTextChangedListener(new TextWatcher() {

public void afterTextChanged(Editable s) {
if(lv1.getVisibility() != View.VISIBLE)
    lv1.setVisibility(View.VISIBLE);
}

public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}

public void onTextChanged(CharSequence s, int start, int before,
int count) {

textlength=ed.getText().length();
arr_sort.clear();
for(int i=0;i<lv_arr.length;i++)
{
if(textlength<=lv_arr[i].length())
{
if(ed.getText().toString().equalsIgnoreCase((String) lv_arr[i].subSequence(0,    textlength)))
{
arr_sort.add(lv_arr[i]);
}
}
}

lv1.setAdapter(new ArrayAdapter<String>    (MainActivity.this,android.R.layout.simple_list_item_1 , arr_sort));

} 
});
}




@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
}

}

推荐答案

我会这样做:

   EditText etSearch = (EditText) getView().findViewById(R.id.etSearch);
    etSearch.addTextChangedListener(new TextWatcher(){
            public void afterTextChanged(Editable s) {
                if(view.getVisibility() != View.Visible)
                       view.setVisiblity(View.Visible);
            }
            public void beforeTextChanged(CharSequence s, int start, int count, int after){}
            public void onTextChanged(CharSequence s, int start, int before, int count){}
        }); 

这篇关于隐藏一个Android ListView，直到输入搜索字符串的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！