我正在尝试为我正在从事的项目创建一个 RSS 提要阅读器。我让它正确地将所有内容解析为文本视图，唯一的问题是它不会显示我从解析的 xml 文件中获取的图像，该文件获取 html 描述。我得到一堆蓝色块而不是图像。因此，我尝试使用适用于 Html.toHtml 方法的 ImgGetter 方法，该方法可以将 html 标记转换为 android 中 textview 的普通 Web 文本，尽管我遵循了一些指南，但它仍然只显示蓝色块而不是图像。
这是我的代码：
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import project.gate6.rssreader.R;
import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.Environment;
import android.text.Html;
import android.text.Html.ImageGetter;
import android.text.method.ScrollingMovementMethod;
import android.widget.TextView;
public class ShowDetails extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.details);
TextView detailsTitle = (TextView)findViewById(R.id.detailstitle);
TextView detailsDescription = (TextView)findViewById(R.id.detailsdescription);
TextView detailsPubdate = (TextView)findViewById(R.id.detailspubdate);
TextView detailsLink = (TextView)findViewById(R.id.detailslink);
Bundle bundle = this.getIntent().getExtras();
detailsTitle.setText(bundle.getString("keyTitle"));
detailsDescription.setText(Html.fromHtml(bundle.getString("keyDescription"),imgGetter,null));
detailsDescription.setMovementMethod(new ScrollingMovementMethod());
detailsPubdate.setText(bundle.getString("keyPubdate"));
detailsLink.setText(bundle.getString("keyLink"));
}
static ImageGetter imgGetter = new Html.ImageGetter() {
@Override
public Drawable getDrawable(String source) {
HttpGet get = new HttpGet(source);
DefaultHttpClient client = new DefaultHttpClient();
Drawable drawable = null;
try{
HttpResponse response = client.execute(get);
InputStream stream = response.getEntity().getContent();
FileOutputStream fileout = new FileOutputStream(new File(Environment.getExternalStorageDirectory().getAbsolutePath()));
int read = stream.read();
while(read != -1)
{
fileout.write(read);
read = stream.read();
}
fileout.flush();
fileout.close();
drawable = Drawable.createFromPath(Environment.getExternalStorageDirectory().getAbsolutePath());
drawable.setBounds(0,0,drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
}
catch(ClientProtocolException e)
{
e.printStackTrace();
}
catch(IOException e)
{
e.printStackTrace();
}
return drawable;
}
};
}
我发现 webview 效果更好，这就是我编辑代码时所做的：
import project.gate6.rssreader.R;
import android.app.Activity;
import android.os.Bundle;
import android.webkit.WebView;
import android.widget.TextView;
public class ShowDetails extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.details);
final String mimetype = "text/html";
final String encoding = "UTF-8";
TextView detailsTitle = (TextView)findViewById(R.id.detailstitle);
WebView detailsDescription = (WebView)findViewById(R.id.detailsdescription);
TextView detailsPubdate = (TextView)findViewById(R.id.detailspubdate);
TextView detailsLink = (TextView)findViewById(R.id.detailslink);
Bundle bundle = this.getIntent().getExtras();
detailsTitle.setText(bundle.getString("keyTitle"));
detailsDescription.loadDataWithBaseURL("",bundle.getString("keyDescription"), mimetype, encoding, "");
detailsPubdate.setText(bundle.getString("keyPubdate"));
detailsLink.setText(bundle.getString("keyLink"));
}
}