在Android中使用canvas和bitmap，如何获取此图像? [英] Using canvas and bitmap in Android , how to get this image?

问题描述

我是android的新手.我正在尝试绘制此图像(匹配统计信息) ，然后用10％到100％的颜色填充图像.我做了很多尝试，这就是图片

I am new in android. I am trying to draw this image(match statistic) and fill the image with color with 10% to 100% . I tried this much and this is image

这是代码

public class DrawView extends View {
Paint paint = new Paint();

public DrawView(Context context) {
    super(context);
}

@Override
public void onDraw(Canvas canvas) {
    paint.setColor(Color.BLACK);
    paint.setStrokeWidth(3);
    canvas.drawRect(30, 30, 100, 100, paint);
    paint.setStrokeWidth(0);
    paint.setColor(Color.GRAY);
    canvas.drawRect(33, 60, 97, 97, paint);
    paint.setColor(Color.WHITE);
    canvas.drawRect(33, 33, 97, 60, paint);

}

任何建议对我都会有很大帮助. 预先感谢.

Any Suggestion will be much helpful for me. Thanks in advance.

推荐答案

我将准备两个图像-完全填充和未填充(仅笔画).有了它们，将它们作为两个Bitmap对象加载，然后像这样绘制:

I would prepare two images - fully filled and not filled (only stroke). Having that, load them as two Bitmap objects and then draw like that:

float fillProgress = 0.1f; // let's say image is 10% filled

canvas.drawBitmap(onlyStroke, 0f, 0f, null);  // draw just stroke first

canvas.save();
canvas.clipRect(
    0f,                                       // left
    getHeight() - fillProgress * getHeight(), // top
    getWidth(),                               // right
    getHeight()                               // bottom
);
canvas.drawBitmap(filled, 0f, 0f, null);      // region of filled image specified by clipRect will now be drawn on top of onlyStroke image
canvas.restore();

使用两幅概述和填充的图像，例如在下面.

Using two images, outlined and filled e.g. below.

上面的代码执行以下操作:

The code above does the following:

1. 绘制轮廓.
2. 应用剪辑(裁剪)区域.
3. 在应用作物的情况下绘制填充形状.
4. 根据需要删除剪辑，图像.

应用不同的片段大小，可以获得所需填充的百分比.例如

Applying different clip sizes, you can get the % of fill you require. e.g.

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