Java 使用URL图像的Android自定义ListView
我一直在尝试让我的ListView填充来自适配器已知的网站URL的图像。活动会使每个图像膨胀，但我的模拟器甚至不会启动，只会显示黑色。我在整个代码中搜索都没有结果，尝试了很多东西，但不幸的是，我现在被卡住了。 第一个类是我的适配器类，它为每个索引提供一个视图 第二个类是我的活动类，它加载视图。第三个类是helper类 还有两个布局XML文件和一个XML清单 GalleryAdapter.javaJava 使用URL图像的Android自定义ListView,java,android,xml,listview,Java,Android,Xml,Listview,我一直在尝试让我的ListView填充来自适配器已知的网站URL的图像。活动会使每个图像膨胀，但我的模拟器甚至不会启动，只会显示黑色。我在整个代码中搜索都没有结果，尝试了很多东西，但不幸的是，我现在被卡住了。 第一个类是我的适配器类，它为每个索引提供一个视图 第二个类是我的活动类，它加载视图。第三个类是helper类 还有两个布局XML文件和一个XML清单 GalleryAdapter.java import java.io.IOException; import java.io.InputSt
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import com.example.imageshow.R;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class GalleryAdapter extends ArrayAdapter<JSONObject>{
DrawableManager dM = new DrawableManager();
Server s = new Server();
Context ctx;
LayoutInflater myInflater = (LayoutInflater) ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
public GalleryAdapter(Context context, int resource) {
super(context, resource);
ctx = context;
// TODO Auto-generated constructor stub
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
if (convertView==null){
convertView = myInflater.inflate(R.layout.gallery_item, parent, true);
}
TextView name = (TextView) convertView.findViewById(R.id.name);
name.setText(s.galleryObjects.get(position).getName());
TextView eventDate = (TextView) convertView.findViewById(R.id.eventDate);
eventDate.setText(s.galleryObjects.get(position).getEventDate());
ImageView image = (ImageView) convertView.findViewById(R.id.image);
String imageUrl = s.galleryObjects.get(position).getImageURL();
//which one works??
//1
image.setImageDrawable(dM.fetchDrawable(imageUrl));
//2
try {
image = (ImageView) convertView.findViewById(R.id.image);
Bitmap bitmap = BitmapFactory.decodeStream((InputStream)new URL(imageUrl).getContent());
image.setImageBitmap(bitmap);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
//3
//new DownloadImageTask(image).execute(s.galleryObjects.get(position).getImageURL());
return convertView;
}
public static Bitmap getBitmapFromURL(String src) {
try {
Log.e("src",src);
URL url = new URL(src);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
Log.e("Bitmap","returned");
return myBitmap;
} catch (IOException e) {
e.printStackTrace();
Log.e("Exception",e.getMessage());
return null;
}
}
class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
}
import com.example.imageshow.R;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.ListView;
public class GalleryActivity extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
GalleryAdapter p = new GalleryAdapter(this,0);
setContentView(R.layout.galleries);
ListView l = (ListView) findViewById(R.id.galleryList);
ImageView moreButton = (ImageView) findViewById(R.id.moreButton);
ImageView cameraButton = (ImageView) findViewById(R.id.cameraButton);
moreButton.setOnClickListener(new MoreButtonListener());
cameraButton.setOnClickListener(new CameraButtonListener());
l.setAdapter(p);
setVisible(true);
}
public class MoreButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
}
public class CameraButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
}
}
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.util.HashMap;
import java.util.Map;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import android.graphics.drawable.Drawable;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.widget.ImageView;
public class DrawableManager {
private final Map<String, Drawable> drawableMap;
public DrawableManager() {
drawableMap = new HashMap<String, Drawable>();
}
public Drawable fetchDrawable(String urlString) {
if (drawableMap.containsKey(urlString)) {
return drawableMap.get(urlString);
}
try {
InputStream is = fetch(urlString);
Drawable drawable = Drawable.createFromStream(is, "src");
if (drawable != null) {
drawableMap.put(urlString, drawable);
Log.d(this.getClass().getSimpleName(), "got a thumbnail drawable: " + drawable.getBounds() + ", "
+ drawable.getIntrinsicHeight() + "," + drawable.getIntrinsicWidth() + ", "
+ drawable.getMinimumHeight() + "," + drawable.getMinimumWidth());
} else {
Log.w(this.getClass().getSimpleName(), "could not get thumbnail");
}
return drawable;
} catch (MalformedURLException e) {
Log.e(this.getClass().getSimpleName(), "fetchDrawable failed", e);
return null;
} catch (IOException e) {
Log.e(this.getClass().getSimpleName(), "fetchDrawable failed", e);
return null;
}
}
public void fetchDrawableOnThread(final String urlString, final ImageView imageView) {
if (drawableMap.containsKey(urlString)) {
imageView.setImageDrawable(drawableMap.get(urlString));
}
final Handler handler = new Handler() {
@Override
public void handleMessage(Message message) {
imageView.setImageDrawable((Drawable) message.obj);
}
};
Thread thread = new Thread() {
@Override
public void run() {
//TODO : set imageView to a "pending" image
Drawable drawable = fetchDrawable(urlString);
Message message = handler.obtainMessage(1, drawable);
handler.sendMessage(message);
}
};
thread.start();
}
private InputStream fetch(String urlString) throws MalformedURLException, IOException {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet request = new HttpGet(urlString);
HttpResponse response = httpClient.execute(request);
return response.getEntity().getContent();
}
}
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import com.example.imageshow.R;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class GalleryAdapter extends ArrayAdapter<JSONObject>{
DrawableManager dM = new DrawableManager();
Server s = new Server();
Context ctx;
LayoutInflater myInflater = (LayoutInflater) ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
public GalleryAdapter(Context context, int resource) {
super(context, resource);
ctx = context;
// TODO Auto-generated constructor stub
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
if (convertView==null){
convertView = myInflater.inflate(R.layout.gallery_item, parent, true);
}
TextView name = (TextView) convertView.findViewById(R.id.name);
name.setText(s.galleryObjects.get(position).getName());
TextView eventDate = (TextView) convertView.findViewById(R.id.eventDate);
eventDate.setText(s.galleryObjects.get(position).getEventDate());
ImageView image = (ImageView) convertView.findViewById(R.id.image);
String imageUrl = s.galleryObjects.get(position).getImageURL();
//which one works??
//1
image.setImageDrawable(dM.fetchDrawable(imageUrl));
//2
try {
image = (ImageView) convertView.findViewById(R.id.image);
Bitmap bitmap = BitmapFactory.decodeStream((InputStream)new URL(imageUrl).getContent());
image.setImageBitmap(bitmap);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
//3
//new DownloadImageTask(image).execute(s.galleryObjects.get(position).getImageURL());
return convertView;
}
public static Bitmap getBitmapFromURL(String src) {
try {
Log.e("src",src);
URL url = new URL(src);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
Log.e("Bitmap","returned");
return myBitmap;
} catch (IOException e) {
e.printStackTrace();
Log.e("Exception",e.getMessage());
return null;
}
}
class DownloadImageTask extends AsyncTask<String, Void, Bitmap> {
ImageView bmImage;
public DownloadImageTask(ImageView bmImage) {
this.bmImage = bmImage;
}
protected Bitmap doInBackground(String... urls) {
String urldisplay = urls[0];
Bitmap mIcon11 = null;
try {
InputStream in = new java.net.URL(urldisplay).openStream();
mIcon11 = BitmapFactory.decodeStream(in);
} catch (Exception e) {
Log.e("Error", e.getMessage());
e.printStackTrace();
}
return mIcon11;
}
protected void onPostExecute(Bitmap result) {
bmImage.setImageBitmap(result);
}
}
}
import com.example.imageshow.R;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;
import android.widget.ListView;
public class GalleryActivity extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
GalleryAdapter p = new GalleryAdapter(this,0);
setContentView(R.layout.galleries);
ListView l = (ListView) findViewById(R.id.galleryList);
ImageView moreButton = (ImageView) findViewById(R.id.moreButton);
ImageView cameraButton = (ImageView) findViewById(R.id.cameraButton);
moreButton.setOnClickListener(new MoreButtonListener());
cameraButton.setOnClickListener(new CameraButtonListener());
l.setAdapter(p);
setVisible(true);
}
public class MoreButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
}
public class CameraButtonListener implements OnClickListener{
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
}
}
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.util.HashMap;
import java.util.Map;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import android.graphics.drawable.Drawable;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.widget.ImageView;
public class DrawableManager {
private final Map<String, Drawable> drawableMap;
public DrawableManager() {
drawableMap = new HashMap<String, Drawable>();
}
public Drawable fetchDrawable(String urlString) {
if (drawableMap.containsKey(urlString)) {
return drawableMap.get(urlString);
}
try {
InputStream is = fetch(urlString);
Drawable drawable = Drawable.createFromStream(is, "src");
if (drawable != null) {
drawableMap.put(urlString, drawable);
Log.d(this.getClass().getSimpleName(), "got a thumbnail drawable: " + drawable.getBounds() + ", "
+ drawable.getIntrinsicHeight() + "," + drawable.getIntrinsicWidth() + ", "
+ drawable.getMinimumHeight() + "," + drawable.getMinimumWidth());
} else {
Log.w(this.getClass().getSimpleName(), "could not get thumbnail");
}
return drawable;
} catch (MalformedURLException e) {
Log.e(this.getClass().getSimpleName(), "fetchDrawable failed", e);
return null;
} catch (IOException e) {
Log.e(this.getClass().getSimpleName(), "fetchDrawable failed", e);
return null;
}
}
public void fetchDrawableOnThread(final String urlString, final ImageView imageView) {
if (drawableMap.containsKey(urlString)) {
imageView.setImageDrawable(drawableMap.get(urlString));
}
final Handler handler = new Handler() {
@Override
public void handleMessage(Message message) {
imageView.setImageDrawable((Drawable) message.obj);
}
};
Thread thread = new Thread() {
@Override
public void run() {
//TODO : set imageView to a "pending" image
Drawable drawable = fetchDrawable(urlString);
Message message = handler.obtainMessage(1, drawable);
handler.sendMessage(message);
}
};
thread.start();
}
private InputStream fetch(String urlString) throws MalformedURLException, IOException {
DefaultHttpClient httpClient = new DefaultHttpClient();
HttpGet request = new HttpGet(urlString);
HttpResponse response = httpClient.execute(request);
return response.getEntity().getContent();
}
}
import java.io.IOException；
导入java.io.InputStream；
导入java.net.MalformedURLException；
导入java.util.HashMap；
导入java.util.Map；
导入org.apache.http.HttpResponse；
导入org.apache.http.client.methods.HttpGet；
导入org.apache.http.impl.client.DefaultHttpClient；
导入android.graphics.drawable.drawable；
导入android.os.Handler；
导入android.os.Message；
导入android.util.Log；
导入android.widget.ImageView；
公共类DrawableManager{
私有最终地图drawableMap；
公共提款经理（）{
drawableMap=新HashMap（）；
}
公共可提取可提取（字符串urlString）{
if（drawableMap.containsKey（urlString））{
返回drawableMap.get（urlString）；
}
试一试{
InputStream is=fetch（urlString）；
Drawable Drawable=Drawable.createFromStream（是“src”）；
如果（可绘制！=null）{
drawableMap.put（urlString，drawable）；
Log.d（this.getClass（）.getSimpleName（），“获得了可绘制的缩略图：“+drawable.getBounds（）+”，”
+drawable.getIntrinsicHeight（）+”，“+drawable.getIntrinsicWidth（）+”，”
+可绘制的.getMinimumHeight（）+”，“+drawable.getMinimumWidth（））；
}否则{
Log.w（this.getClass（）.getSimpleName（），“无法获取缩略图”）；
}
回拉；
}捕获（格式错误）{
Log.e（this.getClass（）.getSimpleName（），“fetchDrawable失败”，e）；
返回null；
}捕获（IOE异常）{
Log.e（this.getClass（）.getSimpleName（），“fetchDrawable失败”，e）；
返回null；
}
}
public void fetchDrawableOnThread（最终字符串urlString，最终图像视图ImageView）{
if（drawableMap.containsKey（urlString））{
setImageDrawable（drawableMap.get（urlString））；
}
最终处理程序=新处理程序（）{
@凌驾
公共无效handleMessage（消息消息）{
setImageDrawable（（Drawable）message.obj）；
}
};
线程线程=新线程（）{
@凌驾
公开募捐{
//TODO:将imageView设置为“挂起”图像
Drawable Drawable=fetchDrawable（urlString）；
Message Message=handler.getainmessage（1，可绘制）；
handler.sendMessage（message）；
}
};
thread.start（）；
}
私有InputStream获取（字符串urlString）引发错误的InputStream异常，IOException{
DefaultHttpClient httpClient=新的DefaultHttpClient（）；
HttpGet请求=新的HttpGet（urlString）；
HttpResponse response=httpClient.execute（请求）；
返回response.getEntity（）.getContent（）；
}
}
<?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="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#fbfbfb" >
<ImageView
android:id = "@+id/cameraButton"
android:layout_height="wrap_content"
android:layout_width = "wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:clickable = "true"
android:adjustViewBounds="true"
android:padding="10dp"
android:maxHeight="400dp"
android:src="@drawable/ic_launcher"
android:background="#b9b9b9">
</ImageView>
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:clickable="false"
android:maxHeight="400dp"
android:text="SPORTSPHOTOS.com"
android:textColor="#123123" >
</TextView>
<ImageView
android:id = "@+id/moreButton"
android:layout_height="wrap_content"
android:layout_width = "wrap_content"
android:layout_alignParentRight="true"
android:adjustViewBounds="true"
android:clickable="true"
android:padding="10dp"
android:maxHeight="60dp"
android:layout_centerVertical="true"
android:src="@drawable/more"
>
</ImageView>
</RelativeLayout>
<ScrollView
android:layout_width = "fill_parent"
android:layout_height="fill_parent">
<ListView
android:id="@+id/galleryList"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</ListView>
</ScrollView>
</LinearLayout>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:padding="20dp"
android:orientation="vertical"
>
<TextView
android:id="@+id/name"
android:text="Great Wall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="2dp">
</TextView>
<TextView
android:id="@+id/eventDate"
android:text="08-15-2014"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="2dp">
</TextView>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="10dp">
<ImageView
android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:maxHeight="200dp"
android:padding="10dp">
</ImageView>
</LinearLayout>
</LinearLayout>
</RelativeLayout>
<?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="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#fbfbfb" >
<ImageView
android:id = "@+id/cameraButton"
android:layout_height="wrap_content"
android:layout_width = "wrap_content"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:clickable = "true"
android:adjustViewBounds="true"
android:padding="10dp"
android:maxHeight="400dp"
android:src="@drawable/ic_launcher"
android:background="#b9b9b9">
</ImageView>
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:clickable="false"
android:maxHeight="400dp"
android:text="SPORTSPHOTOS.com"
android:textColor="#123123" >
</TextView>
<ImageView
android:id = "@+id/moreButton"
android:layout_height="wrap_content"
android:layout_width = "wrap_content"
android:layout_alignParentRight="true"
android:adjustViewBounds="true"
android:clickable="true"
android:padding="10dp"
android:maxHeight="60dp"
android:layout_centerVertical="true"
android:src="@drawable/more"
>
</ImageView>
</RelativeLayout>
<ScrollView
android:layout_width = "fill_parent"
android:layout_height="fill_parent">
<ListView
android:id="@+id/galleryList"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
</ListView>
</ScrollView>
</LinearLayout>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<LinearLayout
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:padding="20dp"
android:orientation="vertical"
>
<TextView
android:id="@+id/name"
android:text="Great Wall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="2dp">
</TextView>
<TextView
android:id="@+id/eventDate"
android:text="08-15-2014"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="2dp">
</TextView>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="10dp">
<ImageView
android:id="@+id/image"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:adjustViewBounds="true"
android:maxHeight="200dp"
android:padding="10dp">
</ImageView>
</LinearLayout>
</LinearLayout>
</RelativeLayout>
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.imageshow"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.INTERNET" />
<uses-sdk
android:minSdkVersion="18"
android:targetSdkVersion="21" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.SECOND" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity
android:name=".GalleryActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
我认为这些解决方案都行不通。确保通过http加载图像在后台（不是解决方案2）。在listview中在后台加载图像的主要问题是视图循环（）。重用视图时，不应将正在加载的图像设置为初始图像视图。当视图被回收时，应在imageView中加载另一个图像。因此，请跟踪和imageView与url之间的关系。（例如，在将图像设置为imageView之前，将url放入imageView.setTag（url）），检查imageView.getTag（）是否与刚才加载的url匹配 然而，为了让它更容易一点，我总是使用AndroidQuery。从网络异步加载映像只需要两行代码：
//load an image to an ImageView from network, cache image to file and memory
AQuery aq = new AQuery(convertView);
aq.id(R.id.image).image("http://www.vikispot.com/z/images/vikispot/android-w.png");
有关更多选项，请参阅。（如缓存等）在实现自己的
图像加载器时，请尝试使用缓存存储位图，以便它不会总是下载图像。不鼓励在适配器的getView（）
方法中硬下载映像
或
尝试使用图像加载库
等。这些库将为您处理图像缓存和磁盘缓存。您在logcat上是否遇到任何错误？是的，但我不知道它们的任何含义。不过，在第一个类中，我确实将getView（）中的true更改为false。发布您的logcat错误以及问题为什么不尝试一些图像加载程序库，如或谢谢，我将使用建议解决方案重试，并发布更新。