适合屏幕的安卓ImageView的矩阵中心 [英] Fit to Android Imageview Matrix Center of Screen

问题描述

您好即时通讯使用的功能适合屏幕上的这个话题的Andr​​oid图像视图矩阵规模+翻译

Hello Im using a function for fit to screen on this topic Android image view matrix scale + translate

float imageWidth = imageDetail.getDrawable().getIntrinsicWidth();
    float imageHeight = imageDetail.getDrawable().getIntrinsicHeight();
    RectF drawableRect = new RectF(0, 0, imageWidth, imageHeight);
    RectF viewRect = new RectF(0, 0, imageDetail.getWidth(),
            imageDetail.getHeight());
    matrix.setRectToRect(drawableRect, viewRect, Matrix.ScaleToFit.CENTER);
    imageDetail.setImageMatrix(matrix);
    imageDetail.invalidate();

它的工作原理有效，但不是第一次了。当我启动应用程序它不工作。图片犯规表演。当我为挖掘它的工作原理。什么即时做错了什么？感谢您的任何意见

It works effectively but not the first time. When I start the application It doesnt work. Image doesnt show. When I m tap It works. What Im do wrong? Thanks for any advice

推荐答案

你应该把你的code在onWindowFocusChanged方法。

Hi you should place your code in onWindowFocusChanged method.

@Override
public void onWindowFocusChanged(boolean hasFocus) {

    super.onWindowFocusChanged(hasFocus);

    float imageWidth = image.getDrawable().getIntrinsicWidth();
    float imageHeight = image.getDrawable().getIntrinsicHeight();
    RectF drawableRect = new RectF(0, 0, imageWidth, imageHeight);
    RectF viewRect = new RectF(0, 0, image.getWidth(),
            image.getHeight());
    Matrix matrix = new Matrix();
    matrix.setRectToRect(drawableRect, viewRect, Matrix.ScaleToFit.CENTER);
    image.setImageMatrix(matrix);
    image.invalidate();
}

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