android.view.ViewGroup#getBackground ( )源码实例Demo

下面列出了android.view.ViewGroup#getBackground ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。

源代码1 项目： AndroidProject 文件： HintLayout.java

/**
 * 初始化提示的布局
 */
private void initLayout() {

    mMainLayout = (ViewGroup) LayoutInflater.from(getContext()).inflate(R.layout.widget_hint_layout, this, false);

    mImageView = mMainLayout.findViewById(R.id.iv_hint_icon);
    mTextView = mMainLayout.findViewById(R.id.iv_hint_text);

    if (mMainLayout.getBackground() == null) {
        // 默认使用 windowBackground 作为背景
        TypedArray ta = getContext().obtainStyledAttributes(new int[]{android.R.attr.windowBackground});
        mMainLayout.setBackground(ta.getDrawable(0));
        ta.recycle();
    }

    addView(mMainLayout);
}

源代码2 项目： delion 文件： CompositorViewHolder.java

@Override
public void onSwapBuffersCompleted(int pendingSwapBuffersCount) {
    TraceEvent.instant("onSwapBuffersCompleted");

    // Wait until the second frame to turn off the placeholder background on
    // tablets so the tab strip has time to start drawing.
    final ViewGroup controlContainer = (ViewGroup) mControlContainer;
    if (controlContainer != null && controlContainer.getBackground() != null && mHasDrawnOnce) {
        post(new Runnable() {
            @Override
            public void run() {
                controlContainer.setBackgroundResource(0);
            }
        });
    }

    mHasDrawnOnce = true;

    mPendingSwapBuffersCount = pendingSwapBuffersCount;

    if (!mSkipInvalidation || pendingSwapBuffersCount == 0) flushInvalidation();
    mSkipInvalidation = !mSkipInvalidation;
}

源代码3 项目： AndroidChromium 文件： CompositorViewHolder.java

@Override
public void onSwapBuffersCompleted(int pendingSwapBuffersCount) {
    TraceEvent.instant("onSwapBuffersCompleted");

    // Wait until the second frame to turn off the placeholder background on
    // tablets so the tab strip has time to start drawing.
    final ViewGroup controlContainer = (ViewGroup) mControlContainer;
    if (controlContainer != null && controlContainer.getBackground() != null && mHasDrawnOnce) {
        post(new Runnable() {
            @Override
            public void run() {
                controlContainer.setBackgroundResource(0);
            }
        });
    }

    mHasDrawnOnce = true;

    mPendingSwapBuffersCount = pendingSwapBuffersCount;

    if (!mSkipInvalidation || pendingSwapBuffersCount == 0) flushInvalidation();
    mSkipInvalidation = !mSkipInvalidation;
}

源代码4 项目： BlurView 文件： BlurBehindView.java

private void printViewsBehind(ViewGroup rootView) {
    if (!this.isInEditMode() && !(rootView instanceof BlurBehindView) && rootView.getVisibility() == View.VISIBLE && rootView.getAlpha() != 0.0F) {
        if (rootView.getBackground() != null) {
            this.blurCanvas.save();
            this.blurCanvas.translate((float) (this.childPositionInWindow[0] - this.thisPositionInWindow[0] + this.halfPaddingOnSides), (float) (this.halfPaddingOnSides + this.childPositionInWindow[1] - this.thisPositionInWindow[1]));
            rootView.getBackground().draw(this.blurCanvas);
            this.blurCanvas.restore();
        }

        for (int i = 0; i < rootView.getChildCount(); ++i) {
            View childView = rootView.getChildAt(i);
            if (childView.findViewWithTag(TAG_VIEW) != null & rootView.getVisibility() == View.VISIBLE) {
                this.printViewsBehind((ViewGroup) childView);
            } else if (childView.getVisibility() == View.VISIBLE) {
                this.blurCanvas.save();
                childView.getLocationOnScreen(this.childPositionInWindow);
                this.blurCanvas.translate((float) (this.halfPaddingOnSides + this.childPositionInWindow[0] - this.thisPositionInWindow[0]), (float) (this.halfPaddingOnSides + this.childPositionInWindow[1] - this.thisPositionInWindow[1]));
                this.blurCanvas.scale(childView.getScaleX(), childView.getScaleY());
                childView.draw(this.blurCanvas);
                this.blurCanvas.restore();
            }
        }
    }
}

源代码5 项目： 365browser 文件： CompositorViewHolder.java

@Override
public void didSwapFrame(int pendingFrameCount) {
    TraceEvent.instant("didSwapFrame");

    // Wait until the second frame to turn off the placeholder background on
    // tablets so the tab strip has time to start drawing.
    final ViewGroup controlContainer = (ViewGroup) mControlContainer;
    if (controlContainer != null && controlContainer.getBackground() != null && mHasDrawnOnce) {
        post(new Runnable() {
            @Override
            public void run() {
                controlContainer.setBackgroundResource(0);
            }
        });
    }

    mHasDrawnOnce = true;

    mPendingFrameCount = pendingFrameCount;

    if (!mSkipInvalidation || pendingFrameCount == 0) flushInvalidation();
    mSkipInvalidation = !mSkipInvalidation;
}

源代码6 项目： android_9.0.0_r45 文件： EnterTransitionCoordinator.java

@Override
protected void onTransitionsComplete() {
    moveSharedElementsFromOverlay();
    final ViewGroup decorView = getDecor();
    if (decorView != null) {
        decorView.sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED);

        Window window = getWindow();
        if (window != null && mReplacedBackground == decorView.getBackground()) {
            window.setBackgroundDrawable(null);
        }
    }
}

源代码7 项目： android_9.0.0_r45 文件： EnterTransitionCoordinator.java

public void stop() {
    // Restore the background to its previous state since the
    // Activity is stopping.
    if (mBackgroundAnimator != null) {
        mBackgroundAnimator.end();
        mBackgroundAnimator = null;
    } else if (mWasOpaque) {
        ViewGroup decorView = getDecor();
        if (decorView != null) {
            Drawable drawable = decorView.getBackground();
            if (drawable != null) {
                drawable.setAlpha(1);
            }
        }
    }
    makeOpaque();
    mIsCanceled = true;
    mResultReceiver = null;
    mActivity = null;
    moveSharedElementsFromOverlay();
    if (mTransitioningViews != null) {
        showViews(mTransitioningViews, true);
        setTransitioningViewsVisiblity(View.VISIBLE, true);
    }
    showViews(mSharedElements, true);
    clearState();
}

源代码8 项目： android_9.0.0_r45 文件： ExitTransitionCoordinator.java

private void fadeOutBackground() {
    if (mBackgroundAnimator == null) {
        ViewGroup decor = getDecor();
        Drawable background;
        if (decor != null && (background = decor.getBackground()) != null) {
            background = background.mutate();
            getWindow().setBackgroundDrawable(background);
            mBackgroundAnimator = ObjectAnimator.ofInt(background, "alpha", 0);
            mBackgroundAnimator.addListener(new AnimatorListenerAdapter() {
                @Override
                public void onAnimationEnd(Animator animation) {
                    mBackgroundAnimator = null;
                    if (!mIsCanceled) {
                        mIsBackgroundReady = true;
                        notifyComplete();
                    }
                    backgroundAnimatorComplete();
                }
            });
            mBackgroundAnimator.setDuration(getFadeDuration());
            mBackgroundAnimator.start();
        } else {
            backgroundAnimatorComplete();
            mIsBackgroundReady = true;
        }
    }
}

源代码9 项目： LaunchEnr 文件： NotificationMainView.java

@Override
protected void onFinishInflate() {
    super.onFinishInflate();

    mTextAndBackground = (ViewGroup) findViewById(R.id.text_and_background);
    ColorDrawable colorBackground = (ColorDrawable) mTextAndBackground.getBackground();
    mBackgroundColor = colorBackground.getColor();
    RippleDrawable rippleBackground = new RippleDrawable(ColorStateList.valueOf(
            ThemeUtils.getAttrColor(getContext(), android.R.attr.colorControlHighlight)),
            colorBackground, null);
    mTextAndBackground.setBackground(rippleBackground);
    mTitleView = (TextView) mTextAndBackground.findViewById(R.id.title);
    mTextView = (TextView) mTextAndBackground.findViewById(R.id.text);
}

源代码10 项目： Scoops 文件： ViewGroupColorAdapter.java

@Override
public int getColor(ViewGroup view) {
    Drawable bg = view.getBackground();
    if(bg instanceof ColorDrawable){
        return ((ColorDrawable) bg).getColor();
    }
    return 0;
}

源代码11 项目： android_9.0.0_r45 文件： ExitTransitionCoordinator.java

public void startExit(int resultCode, Intent data) {
    if (!mIsExitStarted) {
        mIsExitStarted = true;
        pauseInput();
        ViewGroup decorView = getDecor();
        if (decorView != null) {
            decorView.suppressLayout(true);
        }
        mHandler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                mIsCanceled = true;
                finish();
            }
        };
        delayCancel();
        moveSharedElementsToOverlay();
        if (decorView != null && decorView.getBackground() == null) {
            getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        }
        final boolean targetsM = decorView == null || decorView.getContext()
                .getApplicationInfo().targetSdkVersion >= VERSION_CODES.M;
        ArrayList<String> sharedElementNames = targetsM ? mSharedElementNames :
                mAllSharedElementNames;
        ActivityOptions options = ActivityOptions.makeSceneTransitionAnimation(mActivity, this,
                sharedElementNames, resultCode, data);
        mActivity.convertToTranslucent(new Activity.TranslucentConversionListener() {
            @Override
            public void onTranslucentConversionComplete(boolean drawComplete) {
                if (!mIsCanceled) {
                    fadeOutBackground();
                }
            }
        }, options);
        startTransition(new Runnable() {
            @Override
            public void run() {
                startExitTransition();
            }
        });
    }
}

源代码12 项目： AutoScalingLayout 文件： ASViewGroupUtil.java

public void init(ViewGroup vg, AttributeSet attrs){
    mScaleType = TYPE_FIT_INSIDE;
    String scaleTypeStr = null;
    TypedArray a = null;
    try{
        a = vg.getContext().obtainStyledAttributes(
                attrs, R.styleable.AutoScalingLayout);

        // 获得设计宽高
        mDesignWidth = a.getDimensionPixelOffset(R.styleable.AutoScalingLayout_designWidth, 0);
        mDesignHeight = a.getDimensionPixelOffset(R.styleable.AutoScalingLayout_designHeight, 0);
        // 是否开启自动缩放
        mAutoScaleEnable = a.getBoolean(R.styleable.AutoScalingLayout_autoScaleEnable, true);
        mPreScaling = a.getBoolean(R.styleable.AutoScalingLayout_preScaling, false);
        scaleTypeStr = a.getString(R.styleable.AutoScalingLayout_autoScaleType);
    }catch (Throwable e){
        // 用户使用jar时，没有R.styleable.AutoScalingLayout，需要根据字符串解析参数
        mAutoScaleEnable = true;
        mDesignWidth = 0;
        mDesignHeight = 0;
        for (int i = 0; i < attrs.getAttributeCount(); i++){
            if ("designWidth".equals(attrs.getAttributeName(i))){
                String designWidthStr = attrs.getAttributeValue(i);
                mDesignWidth = getDimensionPixelOffset(vg.getContext(), designWidthStr);
            }
            else if ("designHeight".equals(attrs.getAttributeName(i))) {
                String designHeightStr = attrs.getAttributeValue(i);
                mDesignHeight = getDimensionPixelOffset(vg.getContext(), designHeightStr);
            }
            else if ("autoScaleEnable".equals(attrs.getAttributeName(i))) {
                String autoScaleEnableStr = attrs.getAttributeValue(i);
                if (autoScaleEnableStr.equals("false"))
                    mAutoScaleEnable = false;
            }
            else if ("preScaling".equals(attrs.getAttributeName(i))) {
                String preScalingStr = attrs.getAttributeValue(i);
                if (preScalingStr.equals("true"))
                    mPreScaling = true;
            }
            else if ("autoScaleType".equals(attrs.getAttributeName(i))) {
                scaleTypeStr = attrs.getAttributeValue(i);
            }
        }
    }finally {
        if(null != a)
            a.recycle();
    }

    if (null != scaleTypeStr){
        if (scaleTypeStr.equals("fitWidth"))
            mScaleType = TYPE_FIT_WIDTH;
        else if (scaleTypeStr.equals("fitHeight"))
            mScaleType = TYPE_FIT_HEIGHT;
    }

    mCurrentWidth = mDesignWidth;
    mCurrentHeight = mDesignHeight;

    // 背景为空时，不进入draw函数，这里必须设置默认背景
    if (null == vg.getBackground())
        vg.setBackgroundColor(Color.TRANSPARENT);

    if (DEBUG){
        Log.v("AutoScalingLayout", "mDesignWidth=" + mDesignWidth + " mDesignHeight=" + mDesignHeight);
        //Log.v("AutoScalingLayout", "1dp=" + getDimensionPixelOffset(vg.getContext(), "1dp") + "px");
    }
}

方法所在类

android.view.ViewGroup