java - 这是解码 InputStream 时 BitmapFactory 的错误吗？

Question

这次我用的是这段代码。我想知道这次出了什么问题？我正在使用从网络加载图像的代码。如你看到的。但是图像在解码为位图时失去了质量。(可能是我错了)。你可以看看这张图片。

我试过了

1. 从 URL 获取图像并将其保存为可绘制的 .jpg 图像。然后从资源加载图像。这次效果很好。 但是
2. 当我从 URL 而不是资源中获取 Bitmap 时，它会变得更加模糊，您可以从上方检查它。

看起来 BitmapFectory 中可能有问题要删除

public class MurgeActivity extends Activity {
String abcc = "http://c3.ac-images.myspacecdn.com/images02/84/s_48e1fd15504c49ed8fd008f8592f3082.jpg";
String abcd = "http://c1.ac-images.myspacecdn.com/images02/92/s_3bf09d34200c4423a2b8cb73f12675b8.jpg";

@Override
public void onCreate(Bundle savedInstanceState) {
    try {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        ImageView img1 = (ImageView) findViewById(R.id.cus_image);
        ImageView img4 = (ImageView) findViewById(R.id.cus_image4);

        // Here I am getting image from net.
        Bitmap map = getImageFromWeb("http://c3.ac-images.myspacecdn.com/images02/84/s_48e1fd15504c49ed8fd008f8592f3082.jpg");

        // Here I am getting image from resources
        //Bitmap map = BitmapFactory.decodeResource(getResources(),R.drawable.a1);

        Bitmap enlarge = BitmapFactory.decodeResource(getResources(), R.drawable.enlarge_image_button);
        img1.setImageBitmap(map);

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        map.compress(Bitmap.CompressFormat.JPEG, 100, baos);
        byte[] b = baos.toByteArray();

        String encodedImage = Base64.encodeBytes(b);
        String items = combineArticleImage(encodedImage, enlarge);
        String imgTag = "<img width='100' src='data:image/png;base64," + items
                + "' align='left' style='padding-right:5px; padding-bottom:5px'/>";

        WebView webView = (WebView) findViewById(R.id.web);
        webView.setBackgroundColor(R.color.black);
        webView.loadData(imgTag, "text/html", "utf-8");

        byte[] decodedString = Base64.decode(items, android.util.Base64.DEFAULT);
        Bitmap decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
        Drawable end = new BitmapDrawable(decodedByte);

        Drawable drb = Utils.combineSlidshowImages(new BitmapDrawable(map).getCurrent(), enlarge);
        img4.setImageDrawable(drb);
    } catch (Exception e) {
        Log.e("Exeption", this.getClass().getSimpleName() + e.toString());
    } catch (Error error) {
        Log.e("Error", this.getClass().getSimpleName() + error.toString());
    }

}

public static String combineArticleImage(String baseImage, Bitmap frontImage) {

    String base64Image = null;
    byte[] imagesBytes = null;
    try {
        imagesBytes = Base64.decode(baseImage);

        if (imagesBytes != null) {


            Bitmap map = BitmapFactory.decodeByteArray(imagesBytes, 0, imagesBytes.length);

            Bitmap icon = frontImage;
            Bitmap finalImag = combineImages(map, icon);

            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            finalImag.compress(Bitmap.CompressFormat.JPEG, 100, baos);

            byte[] b = baos.toByteArray();
            base64Image = Base64.encodeBytes(b);
        }
    } catch (Exception e) {
        Log.e("Error", "Combining Article Image");
    }
    return base64Image;
}

public static Bitmap getImageFromWeb(String imglink) {
    Bitmap bmpImage = null;
    try {

        URL imgURL = new URL(imglink);
        URLConnection conn = imgURL.openConnection();
        conn.connect();

        InputStream is = conn.getInputStream();
        BufferedInputStream bis = new BufferedInputStream(is);

        bmpImage = BitmapFactory.decodeStream(bis);
        bis.close();
        is.close();

    } catch (Exception e) {
        Log.e("Exeption", e.toString());
    } catch (Error error) {
        Log.e("Error", error.toString());
    }
    return bmpImage;
}

public static Bitmap combineImages(Bitmap backgroungImage, Bitmap frontImage) { // can
    Bitmap cs = null;
    try {

        cs = Bitmap.createBitmap(backgroungImage.getWidth(), backgroungImage.getHeight(), backgroungImage
                .getConfig());

        Canvas comboImage = new Canvas(cs);
        comboImage.drawBitmap(backgroungImage, 0, 0, null);
        comboImage.drawBitmap(frontImage, backgroungImage.getWidth() - frontImage.getWidth(), backgroungImage
                .getHeight()
                - frontImage.getHeight(), null);

    } catch (Exception e) {
        Log.e("Error", "Exception = " + e.toString());
    } catch (Error e) {
        Log.e("Error", "Message = " + e.toString());
    }
    return cs;
}

}ma​​in.XML

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:background="@color/black"
android:layout_height="fill_parent">
<LinearLayout
    android:layout_width="wrap_content"
    android:paddingRight="2dp"
    android:layout_height="wrap_content"
    android:layout_marginLeft="4dp"
    android:orientation="horizontal"
    android:layout_marginRight="4dp">
    <ImageView
        android:id="@+id/cus_image"
        android:src="@drawable/preview_unavailable"
        android:layout_width="120dp"
        android:layout_height="120dp"
        android:background="@color/transparent"
        android:scaleType="fitCenter" />
    <ImageView
        android:id="@+id/cus_image4"
        android:src="@drawable/preview_unavailable"
        android:layout_width="120dp"
        android:layout_height="120dp"
        android:background="@color/black"
        android:scaleType="fitCenter" />
</LinearLayout>
<LinearLayout
    android:layout_width="wrap_content"
    android:paddingRight="2dp"
    android:layout_height="wrap_content"
    android:layout_marginLeft="4dp"
    android:orientation="horizontal"
    android:layout_marginRight="4dp">
    <WebView
        android:id="@+id/web"
        android:layout_width="wrap_content"
        android:background="@color/black"
        android:layout_height="wrap_content" />
</LinearLayout>

Answer 1

你试过吗

Options options = new BitmapFactory.Options(); 
options.inScaled = false; 
Bitmap source = BitmapFactory.decodeResource(activityName.getResources(), R.id.image, options);

代替:

 cs = Bitmap.createBitmap(backgroungImage.getWidth(), backgroungImage.getHeight(), backgroungImage.getConfig()); 

尝试:

cs = Bitmap.createBitmap(backgroungImage.getWidth(), backgroungImage.getHeight(), Bitmap.Config.ARGB_8888);