我试图从存储在SD卡上的Png文件创建一个位图,然后在imageView中设置该位图。 但它不工作。从存储在sdcard中的png文件创建一个位图(Android)
下面的代码:
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URL;
import com.pxr.tutorial.xmltest.R;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Environment;
import android.widget.ImageView;
public class Getbackground {
URL url;
public static long downloadFile(URL url2) {
try {
URL url = new URL ("http://oranjelan.nl/oranjelan-bg.png");
InputStream input = url.openStream();{
try {
File fileOnSD=Environment.getExternalStorageDirectory();
String storagePath = fileOnSD.getAbsolutePath();
OutputStream output = new FileOutputStream (storagePath + "/oranjelanbg.png");
try {
byte[] buffer = new byte[1024];
int bytesRead = 0;
while ((bytesRead = input.read(buffer, 0, buffer.length)) >= 0) {
output.write(buffer, 0, bytesRead);
}
} finally {
output.flush();
output.close();
//----------------------------------------------------------------------------------------------------------
Bitmap BckGrnd = BitmapFactory.decodeFile(storagePath + "/oranjelanbg.png");
ImageView BackGround=(ImageView)findViewById(R.id.imageView1);
BackGround.setImageBitmap(BckGrnd);
//----------------------------------------------------------=-----------------------------------------------
}
} catch (IOException e) {
throw new RuntimeException(e);
} finally {
try {
input.close();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
} catch (MalformedURLException ex) {
throw new RuntimeException(ex);
} catch (IOException e) {
throw new RuntimeException(e);
}
return 0;
}
//-----------------------------------------------------------------------------------------
private static ImageView findViewById(int imageview1) {
// TODO Auto-generated method stub
return null;
}
//-----------------------------------------------------------------------------------------
}
该文件确实在SD卡上加载成功地,但我不能似乎得到在视图中IMG。
嗯似乎并没有解决问题。 – 2012-07-10 10:51:37