我正在使用this library模糊 android 中布局下方的区域。 当调用模糊 View 时，我收到 stackoverflowerror 和 Activity 崩溃。请帮忙。 谢谢。
这是 logcat 的代码
BlurringView Activity
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.support.v8.renderscript.Allocation;
import android.support.v8.renderscript.Element;
import android.support.v8.renderscript.RenderScript;
import android.support.v8.renderscript.ScriptIntrinsicBlur;
import android.util.AttributeSet;
import android.view.View;
/**
* A custom view for presenting a dynamically blurred version of another view's content.
* <p/>
* Use {@link #setBlurredView(android.view.View)} to set up the reference to the view to be blurred.
* After that, call {@link #invalidate()} to trigger blurring whenever necessary.
*/
public class BlurringView extends View {
public BlurringView(Context context) {
this(context, null);
}
public BlurringView(Context context, AttributeSet attrs) {
super(context, attrs);
final Resources res = getResources();
final int defaultBlurRadius = res.getInteger(R.integer.default_blur_radius);
final int defaultDownsampleFactor = res.getInteger(R.integer.default_downsample_factor);
final int defaultOverlayColor = res.getColor(R.color.default_overlay_color);
initializeRenderScript(context);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.PxBlurringView);
setBlurRadius(a.getInt(R.styleable.PxBlurringView_blurRadius, defaultBlurRadius));
setDownsampleFactor(a.getInt(R.styleable.PxBlurringView_downsampleFactor,
defaultDownsampleFactor));
setOverlayColor(a.getColor(R.styleable.PxBlurringView_overlayColor, defaultOverlayColor));
a.recycle();
}
public void setBlurredView(View blurredView) {
mBlurredView = blurredView;
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mBlurredView != null) {
if (prepare()) {
// If the background of the blurred view is a color drawable, we use it to clear
// the blurring canvas, which ensures that edges of the child views are blurred
// as well; otherwise we clear the blurring canvas with a transparent color.
if (mBlurredView.getBackground() != null && mBlurredView.getBackground() instanceof ColorDrawable) {
mBitmapToBlur.eraseColor(((ColorDrawable) mBlurredView.getBackground()).getColor());
} else {
mBitmapToBlur.eraseColor(Color.TRANSPARENT);
}
mBlurredView.draw(mBlurringCanvas);
blur();
mBlurredView.invalidate();
canvas.save();
canvas.translate(mBlurredView.getX() - getX(), mBlurredView.getY() - getY());
canvas.scale(mDownsampleFactor, mDownsampleFactor);
canvas.drawBitmap(mBlurredBitmap, 0, 0, null);
canvas.restore();
}
canvas.drawColor(mOverlayColor);
}
}
public void setBlurRadius(int radius) {
mBlurScript.setRadius(radius);
}
public void setDownsampleFactor(int factor) {
if (factor <= 0) {
throw new IllegalArgumentException("Downsample factor must be greater than 0.");
}
if (mDownsampleFactor != factor) {
mDownsampleFactor = factor;
mDownsampleFactorChanged = true;
}
}
public void setOverlayColor(int color) {
mOverlayColor = color;
}
private void initializeRenderScript(Context context) {
mRenderScript = RenderScript.create(context);
mBlurScript = ScriptIntrinsicBlur.create(mRenderScript, Element.U8_4(mRenderScript));
}
protected boolean prepare() {
final int width = mBlurredView.getWidth();
final int height = mBlurredView.getHeight();
if (mBlurringCanvas == null || mDownsampleFactorChanged
|| mBlurredViewWidth != width || mBlurredViewHeight != height) {
mDownsampleFactorChanged = false;
mBlurredViewWidth = width;
mBlurredViewHeight = height;
int scaledWidth = width / mDownsampleFactor;
int scaledHeight = height / mDownsampleFactor;
// The following manipulation is to avoid some RenderScript artifacts at the edge.
scaledWidth = scaledWidth - scaledWidth % 4 + 4;
scaledHeight = scaledHeight - scaledHeight % 4 + 4;
if (mBlurredBitmap == null
|| mBlurredBitmap.getWidth() != scaledWidth
|| mBlurredBitmap.getHeight() != scaledHeight) {
mBitmapToBlur = Bitmap.createBitmap(scaledWidth, scaledHeight,
Bitmap.Config.ARGB_8888);
if (mBitmapToBlur == null) {
return false;
}
mBlurredBitmap = Bitmap.createBitmap(scaledWidth, scaledHeight,
Bitmap.Config.ARGB_8888);
if (mBlurredBitmap == null) {
return false;
}
}
mBlurringCanvas = new Canvas(mBitmapToBlur);
mBlurringCanvas.scale(1f / mDownsampleFactor, 1f / mDownsampleFactor);
mBlurInput = Allocation.createFromBitmap(mRenderScript, mBitmapToBlur,
Allocation.MipmapControl.MIPMAP_NONE, Allocation.USAGE_SCRIPT);
mBlurOutput = Allocation.createTyped(mRenderScript, mBlurInput.getType());
}
return true;
}
protected void blur() {
mBlurInput.copyFrom(mBitmapToBlur);
mBlurScript.setInput(mBlurInput);
mBlurScript.forEach(mBlurOutput);
mBlurOutput.copyTo(mBlurredBitmap);
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
if (mRenderScript != null) {
mRenderScript.destroy();
}
}
private int mDownsampleFactor;
private int mOverlayColor;
private View mBlurredView;
private int mBlurredViewWidth, mBlurredViewHeight;
private boolean mDownsampleFactorChanged;
private Bitmap mBitmapToBlur, mBlurredBitmap;
private Canvas mBlurringCanvas;
private RenderScript mRenderScript;
private ScriptIntrinsicBlur mBlurScript;
private Allocation mBlurInput, mBlurOutput;
}
MyActivity 类
BlurringView blurringView = (BlurringView) addView.findViewById(R.id.circle);
blurringView.setBlurredView(blurringView);
blurringView.invalidate();
Logcat 错误
E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.user.designsample, PID: 19998 java.lang.StackOverflowError: stack size 8MB at android.graphics.Canvas.drawOval(Canvas.java:1155) at android.graphics.Canvas.drawOval(Canvas.java:1147) at android.graphics.drawable.GradientDrawable.draw(GradientDrawable.java:615) at android.view.View.drawBackground(View.java:16376) at android.view.View.draw(View.java:16175) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundredpx.android.blur.BlurringView.onDraw(BlurringView.java:65) at android.view.View.draw(View.java:16184) at com.fivehundred 05-05 23:16:31.323 19998-19998/com.example.user.humandesignsample E/JavaBinder: !!! FAILED BINDER TRANSACTION !!! (parcel size = 6333780) 05-05 23:16:31.361 19998-19998/com.example.user.humandesignsample E/AndroidRuntime: Error reporting crash android.os.TransactionTooLargeException: data parcel size 6333780 bytes at android.os.BinderProxy.transactNative(Native Method) at android.os.BinderProxy.transact(Binder.java:503) at android.app.ActivityManagerProxy.handleApplicationCrash(ActivityManagerNative.java:4425) at com.android.internal.os.RuntimeInit$UncaughtHandler.uncaughtException(RuntimeInit.java:90) at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:693) at java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:690)
最佳答案
问题肯定出在这一行:
blurringView.setBlurredView(blurringView);
您正在将 BlurringView 分配给其自身。这没有任何意义。我假设(我不想阅读整个 BlurringView 类)，setBlurredView 用于您想要模糊的 View 。 BlurringView 将充当blur 叠加层。因此，将blur覆盖层指定为“blurred”根本没有任何意义。
关于java.lang.StackOverflowError : stack size 8MB，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/37065766/