我需要帮助NinePatchDrawable：
我的应用程序可以从网络下载主题.
几乎所有的事情都可以正常工作,除了9-Patch PNG.
final Bitmap bubble = getFromTheme("bubble");
if (bubble == null) return null;
final byte[] chunk = bubble.getNinePatchChunk();
if (!NinePatch.isNinePatchChunk(chunk)) return null;
NinePatchDrawable d = new NinePatchDrawable(getResources(),bubble,chunk,new Rect(),null);
v.setBackgroundDrawable(d);
d = null;
System.gc();
getFromTheme()从SD卡加载Bitmap. 9-Patch PNG已经被编译,这意味着它们包含了所需的块.
我将Bitmap转换为NinePatchDrawable对象的方式似乎是有效的,因为图像是可拉伸的,并且我绘制它.
唯一不起作用的是填充.我已经尝试将填充设置为这样的视图：
final Rect rect = new Rect(); // or just use the new Rect() set d.getPadding(rect); // in the constructor v.setPadding(rect.left,rect.top,rect.right,rect.bottom);
d.getPadding(rect)应该从块中填充变量rect,不应该吗？但它没有.
结果：TextView(v)不显示9-Patch图像的内容区域中的文本.每个坐标中的paddings设置为0.
谢谢阅读.
解决方法
最后,我做到了Android没有正确解释块数据.可能有bug所以你必须自己反序列化块以获取填充数据.
开始了：
package com.dragonwork.example;
import android.graphics.Rect;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
class NinePatchChunk {
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;
}
}
使用上面的类如下：
final byte[] chunk = bitmap.getNinePatchChunk();
if (NinePatch.isNinePatchChunk(chunk)) {
textView.setBackgroundDrawable(new NinePatchDrawable(getResources(),bitmap,NinePatchChunk.deserialize(chunk).mPaddings,null));
}
它会工作完美！