大家。这是我的代码。上下滚动后，我的列表视图越来越慢，然后应用程序关闭。只是为了澄清......我有 2 个文本视图、1 个图像视图和 1 个搜索字段。我的列表视图有一百多个带有图片的项目......
这是我的代码。为了方便起见，我只放了两个项目。我应该在哪里放什么？我是新手。帮我！
package com.example.exemplo;
import java.util.ArrayList;
import java.util.Arrays;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.graphics.Typeface;
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Toast;
public class Listagem extends Activity
{
EditText edittext;
ListView listview;
String[] text;
String[] text2;
int[] image = {
R.drawable.wolf;
R.drawable.cat;
};
int textlength = 0;
ArrayList<String> text_sort = new ArrayList<String>();
ArrayList<String> text2_sort = new ArrayList<String>();
ArrayList<Integer> image_sort = new ArrayList<Integer>();
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
text = getResources().getStringArray(R.array.text);
text2 = getResources().getStringArray(R.array.text2);
edittext = (EditText) findViewById(R.id.EditText01);
listview = (ListView) findViewById(R.id.ListView01);
listview.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long arg3) {
if ("Howl".equals(text[position])) {
MediaPlayer player = MediaPlayer.create(Listagem.this, R.raw.howl);
player.start();
}
if ("Meow".equals(text[position])) {
MediaPlayer player = MediaPlayer.create(Listagem.this, R.raw.meow);
player.start();
}
});
listview.setAdapter(new MyCustomAdapter(text, text2, image));
edittext.addTextChangedListener(new TextWatcher()
{
public void afterTextChanged(Editable s)
{
}
public void beforeTextChanged(CharSequence s, int start,
int count, int after)
{
}
public void onTextChanged(CharSequence s, int start,
int before, int count)
{
textlength = edittext.getText().length();
text_sort.clear();
text2_sort.clear();
image_sort.clear();
for (int i = 0; i < text.length; i++)
{
if (textlength <= text[i].length())
{
if (edittext.getText().toString().
equalsIgnoreCase((String) text[i].subSequence(0, textlength)))
{
text_sort.add(text[i]);
text2_sort.add(text2[i]);
image_sort.add(image[i]);
}
}
}
listview.setOnItemClickListener(new OnItemClickListener(){
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long arg3) {
if ("Howl".equals(text_sort.get(position))) {
MediaPlayer player = MediaPlayer.create(Listagem.this, R.raw.howl);
player.start();
}
if ("Meow".equals(text_sort.get(position))) {
MediaPlayer player = MediaPlayer.create(Listagem.this, R.raw.meow);
player.start();
}
}
});
listview.setAdapter(new MyCustomAdapter
(text_sort, text2_sort, image_sort));
}
});
}
class MyCustomAdapter extends BaseAdapter
{
String[] data_text;
String[] data_text2;
int[] data_image;
MyCustomAdapter()
{
}
MyCustomAdapter(String[] text, String[] text2, int[] image)
{
data_text = text;
data_text2 = text2;
data_image = image;
}
MyCustomAdapter(ArrayList<String> text, ArrayList<String> text2, ArrayList<Integer> image)
{
data_text = new String[text.size()];
data_text2 = new String[text2.size()];
data_image = new int[image.size()];
for(int i=0;i<text.size();i++)
{
data_text[i] = text.get(i);
data_text2[i] = text2.get(i);
data_image[i] = image.get(i);
}
}
public int getCount()
{
return data_text.length;
}
public String getItem(int position)
{
return null;
}
public long getItemId(int position)
{
return position;
}
public View getView(int position, View convertView, ViewGroup parent)
{
LayoutInflater inflater = getLayoutInflater();
View row;
row = inflater.inflate(R.layout.listview, parent, false);
listview.setCacheColorHint(Color.TRANSPARENT);
listview.setFastScrollEnabled(true);
listview.setScrollingCacheEnabled(false);
TextView textview = (TextView) row.findViewById(R.id.TextView01);
TextView textview2 = (TextView) row.findViewById(R.id.TextView02);
Typeface font1 = Typeface.createFromAsset(getAssets(), "arial.ttf");
textview2.setTypeface(font1);
ImageView imageview = (ImageView) row
.findViewById(R.id.ImageView01);
textview.setText(data_text[position]);
textview2.setText(data_text2[position]);
imageview.setImageResource(data_image[position]);
return (row);
}
}
}