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我正在尝试加载位图并将其显示在画布上。我以前用这种方法做过，效果很好。不幸的是，这次出了点问题，我不知道如何才能找到问题所在。

我的代码到这里：

Log.d(TAG, "Loading bitmaps");
this.stageL=BitmapFactory.decodeResource(getResources(), R.drawable.stagel);
Log.d(TAG,"Bitmap loaded");
int stageLHeight = stageL.getHeight();
Log.d(TAG,String.valueOf(stageLHeight));

但随后我在 logcatLoading bitmaps和Bitmap Loaded. 之后，应用程序强制关闭，我再也看不到stageLHeight.

这是日志猫：

11-07 15:22:50.182: DEBUG/LabSetup(613): Loading bitmaps
11-07 15:22:50.182: WARN/ResourceType(613): getEntry failing because entryIndex 3 is beyond type entryCount 1
11-07 15:22:50.182: WARN/ResourceType(613): Failure getting entry for 0x7f020003 (t=1 e=3) in package 0 (error -2147483647)
11-07 15:22:50.182: DEBUG/LabSetup(613): Bitmap loaded
11-07 15:22:50.222: WARN/dalvikvm(613): threadid=9: thread exiting with uncaught exception (group=0x40014760)
11-07 15:22:50.222: ERROR/AndroidRuntime(613): FATAL EXCEPTION: Thread-10
11-07 15:22:50.222: ERROR/AndroidRuntime(613): java.lang.NullPointerException
11-07 15:22:50.222: ERROR/AndroidRuntime(613):     at com.cjs.duallaseralignment.LabSetup.SetCanvasSize(LabSetup.java:53)
11-07 15:22:50.222: ERROR/AndroidRuntime(613):     at com.cjs.duallaseralignment.MainAppPanel.onDraw(MainAppPanel.java:136)
11-07 15:22:50.222: ERROR/AndroidRuntime(613):     at com.cjs.duallaseralignment.MainThread.run(MainThread.java:56)

如果它有用，R.java：

public final class R {
    public static final class attr {
    }
    public static final class drawable {
        public static final int icon=0x7f020000;
        public static final int mag=0x7f020001;
        public static final int magr=0x7f020002;
        public static final int stagel=0x7f020003;
        public static final int stager=0x7f020004;
    }
    public static final class layout {
        public static final int main=0x7f030000;
    }
    public static final class string {
        public static final int app_name=0x7f040001;
        public static final int hello=0x7f040000;
    }
}
4

2 回答 2

1

错误存在于您的 Logcat 中。

11-07 15:22:50.222: ERROR/AndroidRuntime(613): at com.cjs.duallaseralignment.LabSetup.SetCanvasSize(LabSetup.java:53)

如果您能指出第 53 行，将会有所帮助。

由于您没有得到日志告诉您图像的大小，我猜想

int stageLHeight = stageL.getHeight();

是第 53 行。我的下一个猜测是加载的图像为空。如果图像不存在，或者无法从资源文件中解码图像，则可能会发生这种情况。

于 2011-11-07T15:51:37.607 回答
0

天哪！

作为最后的手段，我从项目中删除了图像并重新添加它们，嘿-presto！诡异的...

于 2011-11-07T15:50:31.797 回答