二、具体实现方式

实用截图方法截取整个activity

public static Bitmap shotActivity(Activity ctx) {

    View view = ctx.getWindow().getDecorView();
    view.setDrawingCacheEnabled(true);
    view.buildDrawingCache();

    Bitmap bp = Bitmap.createBitmap(view.getDrawingCache(), 0, 0, view.getMeasuredWidth(),
            view.getMeasuredHeight());

    view.setDrawingCacheEnabled(false);
    view.destroyDrawingCache();

    return bp;
}

实用截图方法截取当前view

public static Bitmap getViewBp(View v) {
    if (null == v) {
        return null;
    }
    v.setDrawingCacheEnabled(true);
    v.buildDrawingCache();
    if (Build.VERSION.SDK_INT >= 11) {
        v.measure(View.MeasureSpec.makeMeasureSpec(v.getWidth(),
                View.MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(
                v.getHeight(), View.MeasureSpec.EXACTLY));
        v.layout((int) v.getX(), (int) v.getY(),
                (int) v.getX() + v.getMeasuredWidth(),
                (int) v.getY() + v.getMeasuredHeight());
    } else {
        v.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
        v.layout(0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());
    }
    Bitmap b = Bitmap.createBitmap(v.getDrawingCache(), 0, 0, v.getMeasuredWidth(), v.getMeasuredHeight());

    v.setDrawingCacheEnabled(false);
    v.destroyDrawingCache();
    return b;
}