我的资源中有一个可绘制的九个补丁。我必须在运行时更改它的一些颜色,方法是将 NinePatchDrawable 保存为位图并更改像素,然后再次将此位图保存为 NinePatchDrawable。
我的代码:
Bitmap src = BitmapFactory.decodeResource(res, resId);
Bitmap bitmap = src.copy(Bitmap.Config.ARGB_8888, true);
//... pixels operation
byte[] chunk = bitmap.getNinePatchChunk();
return new NinePatchDrawable(res, bitmap, chunk, new Rect(), null);
该应用程序在“new NinePatchDrawable”上崩溃,如下所示:
"Signal Catcher" daemon prio=5 tid=4 RUNNABLE
| group="system" sCount=0 dsCount=0 obj=0x40517900 self=0xe89f0
| sysTid=21817 nice=0 sched=0/0 cgrp=[no-cpu-subsys] handle=473072
| schedstat=( 1007082 4364014 23 )
at dalvik.system.NativeStart.run(Native Method)
[<c0294308>] save_stack_trace_tsk+0x0/0x90
[<c03b5568>] proc_pid_stack+0xf8/0x144
[<c03b68cc>] proc_single_show+0x48/0x84
[<c038aef8>] seq_read+0x26c/0x4e4
[<c0371ab8>] vfs_read+0xa8/0x150
[<c0371c0c>] sys_read+0x3c/0x68
[<c0290740>] ret_fast_syscall+0x0/0x30
[<ffffffff>] 0xffffffff
------------------------------
"main" prio=5 tid=1 RUNNABLE
| group="main" sCount=1 dsCount=0 obj=0x400281f8 self=0xd190
| sysTid=21814 nice=0 sched=0/0 cgrp=[no-cpu-subsys] handle=-1345002240
| schedstat=( 1833007809 896209717 2404 )
at android.graphics.NinePatch.validateNinePatchChunk(Native Method)
at android.graphics.NinePatch.<init>(NinePatch.java:50)
at android.graphics.drawable.NinePatchDrawable.<init>(NinePatchDrawable.java:73)
我究竟做错了什么?