Android开发——网络加载点9图

问题 ：安卓加载网络.9图 不会自适应
解决方案：需要先将.9图处理成正常的使用格式
我们使用Android SDK的build-tools下到工具来处理，打开命令行来处理吧，如下：
1、点9图转换：找到转化工具路径（这个路径是我本人的电脑SDK安装路径）
D:\android_sdk\build-tools\33.0.1> （打开命令行）

//单张图片转换，命令：aapt s -i 点9图路径 -o 转换后的图片输出路径
aapt s -i E:\res\shengdan.9.png -o E:\res\shengdan2.png

//图片文件的批量转换，命令：aapt c -v -S 文件夹路径 -C 转换后的图片文件夹的输出路径
aapt c -v -S E:\res -C E:\res\9out

转化后的点9图 ，上传到服务器然后我们进行正常加载了

下面是需要用到的LoadDian9TuUtil 代码

public static void loadDian9Tu(Context context, View imageView, String imgUrl) {
    if (context == null) {
        return;
    }
    if (context instanceof Activity) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
            if (((Activity) context).isDestroyed()) {
                return;
            }
        }
    }
    Glide.with(context)
            .asFile()
            .load(imgUrl)
            .into(new CustomTarget<File>() {
                @Override
                public void onResourceReady(@NonNull File resource, @Nullable Transition<? super File> transition) {
                    try {
                        FileInputStream is = new FileInputStream(resource);
                        setNinePathImage(context, imageView, BitmapFactory.decodeStream(is));
                        is.close();
                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }

                @Override
                public void onLoadCleared(@Nullable Drawable placeholder) {

                }
            });
}

public static void setNinePathImage(Context context, View imageView, Bitmap bitmap) {
    if (bitmap == null)
        return;
    byte[] chunk = bitmap.getNinePatchChunk();
    if (NinePatch.isNinePatchChunk(chunk)) {
        NinePatchDrawable patchy = new NinePatchDrawable(context.getResources(), bitmap, chunk, NinePatchChunk.deserialize(chunk).mPaddings, null);
        imageView.setBackground(patchy);
    }
}

NinePatchChunk 处理类

public static final int NO_COLOR = 0x00000001;
public static final int TRANSPARENT_COLOR = 0x00000000;

public final Rect mPaddings = new Rect();

public int mDivX[];
public int mDivY[];
public int mColor[];

private static void readIntArray(final int[] data, final ByteBuffer buffer) {
    for (int i = 0, n = data.length; i < n; ++i)
        data[i] = buffer.getInt();
}

private static void checkDivCount(final int length) {
    if (length == 0 || (length & 0x01) != 0)
        throw new RuntimeException("invalid nine-patch: " + length);
}

public static NinePatchChunk deserialize(final byte[] data) {
    final ByteBuffer byteBuffer =
            ByteBuffer.wrap(data).order(ByteOrder.nativeOrder());

    if (byteBuffer.get() == 0) return null; // is not serialized

    final NinePatchChunk chunk = new NinePatchChunk();
    chunk.mDivX = new int[byteBuffer.get()];
    chunk.mDivY = new int[byteBuffer.get()];
    chunk.mColor = new int[byteBuffer.get()];

    checkDivCount(chunk.mDivX.length);
    checkDivCount(chunk.mDivY.length);

    // skip 8 bytes
    byteBuffer.getInt();
    byteBuffer.getInt();

    chunk.mPaddings.left = byteBuffer.getInt();
    chunk.mPaddings.right = byteBuffer.getInt();
    chunk.mPaddings.top = byteBuffer.getInt();
    chunk.mPaddings.bottom = byteBuffer.getInt();

    // skip 4 bytes
    byteBuffer.getInt();

    readIntArray(chunk.mDivX, byteBuffer);
    readIntArray(chunk.mDivY, byteBuffer);
    readIntArray(chunk.mColor, byteBuffer);

    return chunk;
}

保存记录，方便以后直接使用