Android clipPath上的UnsupportedOperationException
我在使用Canvas clipPath时遇到了一个不支持的操作异常 这是在HTC轰动XE(4.0.3)上发生的。 它在其他4.0.3设备上运行良好 代码如下:Android clipPath上的UnsupportedOperationException,android,android-canvas,Android,Android Canvas,我在使用Canvas clipPath时遇到了一个不支持的操作异常 这是在HTC轰动XE(4.0.3)上发生的。 它在其他4.0.3设备上运行良好 代码如下: @Override protected void dispatchDraw(Canvas canvas) { canvas.save(); canvas.clipPath(this._mClip); super.dispatchDraw(canvas); canvas.restore(); } 它
@Override
protected void dispatchDraw(Canvas canvas) {
canvas.save();
canvas.clipPath(this._mClip);
super.dispatchDraw(canvas);
canvas.restore();
}
它在具有以下堆栈的“clipPath”上失败:
11-06 12:05:53.650: E/AndroidRuntime(25021): FATAL EXCEPTION: main
11-06 12:05:53.650: E/AndroidRuntime(25021): java.lang.UnsupportedOperationException
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.GLES20Canvas.clipPath(GLES20Canvas.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at com.applicat.meuchedet.views.RoundedListView.dispatchDraw(RoundedListView.java:76)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.draw(View.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.widget.AbsListView.draw(AbsListView.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.widget.ListView.draw(ListView.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.getDisplayList(View.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.drawChild(ViewGroup.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.dispatchDraw(ViewGroup.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.getDisplayList(View.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.drawChild(ViewGroup.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.dispatchDraw(ViewGroup.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.draw(View.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.getDisplayList(View.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.drawChild(ViewGroup.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.dispatchDraw(ViewGroup.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.getDisplayList(View.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.drawChild(ViewGroup.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.dispatchDraw(ViewGroup.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.getDisplayList(View.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.drawChild(ViewGroup.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewGroup.dispatchDraw(ViewGroup.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.draw(View.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.widget.FrameLayout.draw(FrameLayout.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.View.getDisplayList(View.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.HardwareRenderer$GlRenderer.draw(HardwareRenderer.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewRootImpl.draw(ViewRootImpl.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.view.ViewRootImpl.handleMessage(ViewRootImpl.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.os.Handler.dispatchMessage(Handler.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.os.Looper.loop(Looper.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at android.app.ActivityThread.main(ActivityThread.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at java.lang.reflect.Method.invokeNative(Native Method)
11-06 12:05:53.650: E/AndroidRuntime(25021): at java.lang.reflect.Method.invoke(Method.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java)
11-06 12:05:53.650: E/AndroidRuntime(25021): at dalvik.system.NativeStart.main(Native Method)
有一个答案。简而言之:它不再受支持,但如果禁用硬件加速,您仍然可以使用它。有关更多信息,请参阅帖子。您可以通过编辑清单文件来控制单个活动的硬件加速,如下所示:
<application android:hardwareAccelerated="true">
<activity ... />
<activity android:hardwareAccelerated="false" />
我遇到了同样的不支持操作异常问题-当我有一个视图试图使用Canvas clipPath()时,它只会在运行4.0.3的设备上崩溃。你可以看到我是如何解决的。即使我得到了同样的错误,这里的答案也帮助我运行应用程序因为Android的新版本确实支持
clipPath()
随着硬件加速的启动,这可能是一个更好的解决方案:
try {
canvas.clipPath(path);
} catch (UnsupportedOperationException exception) {
setLayerType(View.LAYER_TYPE_SOFTWARE, null);
try {
canvas.clipPath(path);
} catch (UnsupportedOperationException exception2) {
// shouldn't happen, but just in case
}
}
可能的重复对于其他人,您可以使value-v14和value-v15(例如)成为布尔值,以便根据API级别使用硬件加速:android:hardwareAccelerated=“@bool/hardware\u accelerated”