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

下面列出了android.view.ViewGroup#measure ( ) 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： weMessage 文件： MessageEffects.java

static void toggleInvisibleInk(final WebView invisibleInkView, final ViewGroup bubble, TextView text, LinearLayout replay){
    bubble.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);

    text.setVisibility(View.GONE);
    replay.setVisibility(View.GONE);
    invisibleInkView.setVisibility(View.VISIBLE);

    String invisibleInk = "<html><head><style type='text/css' rel='stylesheet'> html { margin: 0; padding: 0em; }</style></head><body><span class='ink'>" + text.getText() + "</span> <script src='jquery.js' type='text/javascript'></script> <script src='invisibleink.js' type='text/javascript'></script></body></html>";

    invisibleInkView.loadDataWithBaseURL("file:///android_asset/html/", invisibleInk, "text/html", "UTF-8", null);
    invisibleInkView.setWebViewClient(new WebViewClient() {
        @Override
        public void onPageFinished(WebView view, String url) {
            invisibleInkView.loadUrl("javascript:weMessage.resizeInvisibleInk(document.body.getBoundingClientRect().height)");
            super.onPageFinished(view, url);
        }
    });
}

源代码2 项目： Android_accordion_view 文件： WidgetHelper.java

/***
 * This function returns the actual height the layout. The getHeight() function returns the current height which might be zero if
 * the layout's visibility is GONE
 * @param layout
 * @return
 */
public static int getFullHeight(ViewGroup layout) {
    int specWidth = View.MeasureSpec.makeMeasureSpec(0 /* any */, View.MeasureSpec.UNSPECIFIED);
    int specHeight = View.MeasureSpec.makeMeasureSpec(0 /* any */, View.MeasureSpec.UNSPECIFIED);


    layout.measure(specWidth,specHeight);
    int totalHeight = 0;//layout.getMeasuredHeight();
    int initialVisibility = layout.getVisibility();
    layout.setVisibility(View.VISIBLE);
    int numberOfChildren = layout.getChildCount();
    for(int i = 0;i<numberOfChildren;i++) {
        View child = layout.getChildAt(i);
        if(child instanceof ViewGroup) {
            totalHeight+=getFullHeight((ViewGroup)child);
        }else {
            int desiredWidth = View.MeasureSpec.makeMeasureSpec(layout.getWidth(),
                    View.MeasureSpec.AT_MOST);
            child.measure(desiredWidth, View.MeasureSpec.UNSPECIFIED);
            totalHeight+=child.getMeasuredHeight();
        }

    }
    layout.setVisibility(initialVisibility);
    return totalHeight;
}

源代码3 项目： ViewToImage 文件： ViewToImageUtil.java

/**
 * viewGroup转换Bitmap
 *
 * @param viewGroup
 * @return
 */
public static Bitmap generateBigBitmap(final ViewGroup viewGroup, int width) {
    if (width > 0) {
        viewGroup.measure(View.MeasureSpec.makeMeasureSpec(width, View.MeasureSpec.EXACTLY),
                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
    } else if (viewGroup.getWidth() <= 0) {
        viewGroup.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
    } else {
        width = viewGroup.getWidth();
    }

    width = width > 0 ? width : viewGroup.getMeasuredWidth();
    LogUtils.d(width + "");
    LogUtils.d(String.format("width=%s, measuredWidth=%s, height=%s, measuredHeight=%s",
            viewGroup.getWidth(), viewGroup.getMeasuredWidth(), viewGroup.getHeight(), viewGroup.getMeasuredHeight()));
    int height = 0;
    List<BitmapWithHeight> list = getWholeViewToBitmap(viewGroup, new ArrayList<BitmapWithHeight>());
    for (BitmapWithHeight item : list) {
        height += item.height;
    }
    return generateBigBitmap(list, width, height);
}

源代码4 项目： SwipeableLayout 文件： SwipeableLayout.java

private Bitmap generateCache(ViewGroup aContainer) {
    View view = aContainer.getChildAt(0);
    int width = 0;
    if (view.getMeasuredWidth() <= 0 || view.getMeasuredHeight() <= 0) {
        int parentSpec = MeasureSpec.makeMeasureSpec(0,MeasureSpec.UNSPECIFIED);
        aContainer.measure(parentSpec, parentSpec);
    }
    width = view.getMeasuredWidth();

    int spec = MeasureSpec.makeMeasureSpec(0,MeasureSpec.UNSPECIFIED);
    int widthspec = MeasureSpec.makeMeasureSpec(width,MeasureSpec.EXACTLY);
    view.measure(widthspec,spec);
    view.layout(0, 0, width, view.getMeasuredHeight());

    Bitmap b = Bitmap.createBitmap(width, view.getHeight(), 
            Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(b);
    view.draw(canvas);

    return b;
}

源代码5 项目： codeexamples-android 文件： Focus2AndroidTest.java

@Override
protected void setUp() throws Exception {
    super.setUp();

    mFocusFinder = FocusFinder.getInstance();

    // inflate the layout
    final Context context = getContext();
    final LayoutInflater inflater = LayoutInflater.from(context);
    mRoot = (ViewGroup) inflater.inflate(R.layout.focus_2, null);

    // manually measure it, and lay it out
    mRoot.measure(500, 500);
    mRoot.layout(0, 0, 500, 500);

    mLeftButton = (Button) mRoot.findViewById(R.id.leftButton);
    mCenterButton = (Button) mRoot.findViewById(R.id.centerButton);
    mRightButton = (Button) mRoot.findViewById(R.id.rightButton);
}

源代码6 项目： QSVideoPlayer 文件： VideoPopWindow.java

public VideoPopWindow(Context context, List<QSVideo> qsVideos, int index) {
    ViewGroup popview = (ViewGroup) LayoutInflater.from(context).inflate(
            R.layout.pop_definition, new FrameLayout(context), false);
    float density = context.getResources().getDisplayMetrics().density;
    int padding = (int) (density * 12);
    for (int i = 0; i < qsVideos.size(); i++) {
        QSVideo qsVideo = qsVideos.get(i);
        TextView textView = new TextView(context);
        textView.setId(i);
        textView.setPadding(padding, padding / 2, padding, padding / 2);
        textView.setText(qsVideo.resolution());
        textView.setTextSize(14);
        textView.setOnClickListener(this);
        textView.setTextColor(index == i ? context.getResources().getColor(R.color.colorMain) : 0xffffffff);
        popview.addView(textView);
    }
    int mode = View.MeasureSpec.AT_MOST;
    //手动调用计算宽高
    popview.measure(View.MeasureSpec.makeMeasureSpec(1080, mode),
            View.MeasureSpec.makeMeasureSpec(1920, mode));
    h = popview.getMeasuredHeight();
    //设置视图
    setContentView(popview);
    setWidth(android.widget.LinearLayout.LayoutParams.WRAP_CONTENT);//设置宽
    setHeight(android.widget.LinearLayout.LayoutParams.WRAP_CONTENT);//设置高
    setFocusable(true);
    setOutsideTouchable(true);
    // 刷新状态
    update();
    // 实例化一个ColorDrawable颜色为半透明
    ColorDrawable dw = new ColorDrawable(0);
    // 点back键和其他地方使其消失,设置了这个才能触发OnDismisslistener ，设置其他控件变化等操作
    setBackgroundDrawable(dw);
}

源代码7 项目： FoldableLayout 文件： FoldableLayout.java

private Bitmap computeBitmap(ViewGroup viewGroup) {
    Bitmap bitmap;
    Rect rect = new Rect();
    viewGroup.getWindowVisibleDisplayFrame(rect);
    viewGroup.destroyDrawingCache();
    viewGroup.setDrawingCacheEnabled(true);
    viewGroup.buildDrawingCache(true);
    bitmap = viewGroup.getDrawingCache(true);
    /**
     * After rotation, the DecorView has no height and no width. Therefore
     * .getDrawingCache() return null. That's why we  have to force measure and layout.
     */
    if (bitmap == null) {
        viewGroup.measure(
                MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.EXACTLY),
                MeasureSpec.makeMeasureSpec(mCoverHeight * 2, MeasureSpec.EXACTLY)
        );
        viewGroup.layout(0, 0, viewGroup.getMeasuredWidth(),
                viewGroup.getMeasuredHeight());
        viewGroup.destroyDrawingCache();
        viewGroup.setDrawingCacheEnabled(true);
        viewGroup.buildDrawingCache(true);
        bitmap = viewGroup.getDrawingCache(true);
    }
    if (bitmap == null) {
        return Bitmap.createBitmap(2, 2, Bitmap.Config.ARGB_8888);
    } else {
        return bitmap.copy(Bitmap.Config.ARGB_8888, false);
    }
}

源代码8 项目： MaterialScrollBar 文件： LayoutWrapContentUpdater.java

/**
 * Same as previous, but with given size in case subTreeRoot itself has layout_width or layout_height = "wrap_content"
 */
private static void wrapContentAgain(ViewGroup subTreeRoot, boolean relayoutAllNodes,
                                     int subTreeRootWidthMeasureSpec, int subTreeRootHeightMeasureSpec)
{
    assert( "main".equals( Thread.currentThread().getName() ) );

    if(subTreeRoot == null)
        return;
    LayoutParams layoutParams = subTreeRoot.getLayoutParams();

    // --- First, we force measure on the subTree
    int widthMeasureSpec 	= subTreeRootWidthMeasureSpec;
    // When LayoutParams.MATCH_PARENT and Width > 0, we apply measured width to avoid getting dimensions too big
    if( layoutParams.width  != LayoutParams.WRAP_CONTENT && subTreeRoot.getWidth() > 0 )
        widthMeasureSpec 	=  MeasureSpec.makeMeasureSpec( subTreeRoot.getWidth(), MeasureSpec.EXACTLY );
    int heightMeasureSpec 	= subTreeRootHeightMeasureSpec;
    // When LayoutParams.MATCH_PARENT and Height > 0, we apply measured height to avoid getting dimensions too big
    if( layoutParams.height != LayoutParams.WRAP_CONTENT && subTreeRoot.getHeight() > 0 )
        heightMeasureSpec 	=  MeasureSpec.makeMeasureSpec( subTreeRoot.getHeight(), MeasureSpec.EXACTLY );
    // This measure recursively the whole sub-tree
    subTreeRoot.measure( widthMeasureSpec, heightMeasureSpec );

    // --- Then recurse on all children to correct the sizes
    recurseWrapContent( subTreeRoot, relayoutAllNodes );

    // --- RequestLayout to finish properly
    subTreeRoot.requestLayout();
}

源代码9 项目： android-layout-wrap-content-updater 文件： LayoutWrapContentUpdater.java

/**
 * Same as previous, but with given size in case subTreeRoot itself has layout_width or layout_height = "wrap_content"
 */
public static void wrapContentAgain( ViewGroup subTreeRoot, boolean relayoutAllNodes,
		int subTreeRootWidthMeasureSpec, int subTreeRootHeightMeasureSpec  )
{
	Log.d(TAG, "+++ LayoutWrapContentUpdater wrapContentAgain on subTreeRoot=["+ subTreeRoot +"], with w="
			+ subTreeRootWidthMeasureSpec +" and h="+ subTreeRootHeightMeasureSpec );
	assert( "main".equals( Thread.currentThread().getName() ) );
	
	if (subTreeRoot == null)
		return;
	LayoutParams layoutParams = subTreeRoot.getLayoutParams();

	// --- First, we force measure on the subTree
	int widthMeasureSpec 	= subTreeRootWidthMeasureSpec;
	// When LayoutParams.MATCH_PARENT and Width > 0, we apply measured width to avoid getting dimensions too big
	if ( layoutParams.width  != LayoutParams.WRAP_CONTENT && subTreeRoot.getWidth() > 0 )
		widthMeasureSpec 	=  MeasureSpec.makeMeasureSpec( subTreeRoot.getWidth(), MeasureSpec.EXACTLY );
	int heightMeasureSpec 	= subTreeRootHeightMeasureSpec;
	// When LayoutParams.MATCH_PARENT and Height > 0, we apply measured height to avoid getting dimensions too big
	if ( layoutParams.height != LayoutParams.WRAP_CONTENT && subTreeRoot.getHeight() > 0 )
		heightMeasureSpec 	=  MeasureSpec.makeMeasureSpec( subTreeRoot.getHeight(), MeasureSpec.EXACTLY );
	// This measure recursively the whole sub-tree
	subTreeRoot.measure( widthMeasureSpec, heightMeasureSpec ); 

	// --- Then recurse on all children to correct the sizes 
	recurseWrapContent( subTreeRoot, relayoutAllNodes );

	// --- RequestLayout to finish properly
	subTreeRoot.requestLayout();		
	return;
}

方法所在类

android.view.ViewGroup