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无法概括速度表的代码

ondraw canvas android

Amol Dale · 技术社区 · 11 年前

以下代码仅适用于设备宽度范围宽度>400至宽度<550,而不是像Tab这样的其他设备(宽度>550)

speedo_meter = getImage(R.drawable.newmagnetometer_final_480);
center_wheel = getImage(R.drawable.center_wheel480);
needle = getImage(R.drawable.arrow480);
canvas.drawBitmap(speedo_meter, (canvas.getWidth() / 2)- speedo_meter.getWidth() / 2,      (canvas.getHeight() / 2)- speedo_meter.getHeight() / 2, null);


// Main Meter Needle

matrix_needle = new Matrix();
 matrix_needle.setTranslate((canvas.getWidth() / 2)- needle.getWidth() ,(canvas.getHeight() / 2)- needle.getHeight());
matrix_needle.postRotate(angle_of_deviation,canvas.getWidth() / 2, 2 * needle.getHeight() - 10);
canvas.drawBitmap(needle, matrix_needle, paint_needle);

// Main Meter Wheel
canvas.drawBitmap(center_wheel, (canvas.getWidth() / 2)- center_wheel.getWidth() / 2,       (canvas.getHeight() / 2)- center_wheel.getHeight() / 2, null);

在选项卡上捕获的上载图像 I want create code for device independent I create code but it work on particular height and width devices but not on all like Tab

1 回复 | 直到 11 年前

Rana 11 年前

您需要像这样更改代码

protected void onDraw(Canvas canvas) {


    canvas.drawBitmap(speedo_meter, (canvas.getWidth() / 2)- speedo_meter.getWidth() / 2,
             (canvas.getHeight() / 3)- speedo_meter.getHeight() / 2, null);


        // Main Meter Needle
        matrix_needle = new Matrix();
        matrix_needle.setTranslate((canvas.getWidth() / 2)- needle.getWidth() / 2,
                (canvas.getHeight() / 3)- needle.getHeight());


        matrix_needle.postRotate(110,
                canvas.getWidth() / 2, (canvas.getHeight() /(float)2.9));

        canvas.drawBitmap(needle, matrix_needle, paint_needle);

}

只需使用相应的设备宽度和高度更改图像。

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