android - 隐藏 android ListView，直到输入搜索字符串

Question

我已遵循本教程 http://www.androidpeople.com/android-listview-searchbox-sort-items我在列表中进行搜索。我想做的唯一改变是最初隐藏 ListView ，结果只在用户开始输入时出现。有办法做到这一点吗？

编辑:添加代码。

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;
}

}

Answer 1

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){}
        });