{"id":641,"date":"2025-01-24T14:58:29","date_gmt":"2025-01-24T06:58:29","guid":{"rendered":"https:\/\/iichen.cn\/?p=641"},"modified":"2025-01-24T14:58:29","modified_gmt":"2025-01-24T06:58:29","slug":"android-imageview%e7%9b%b8%e5%85%b3","status":"publish","type":"post","link":"https:\/\/iichen.cn\/?p=641","title":{"rendered":"Android-ImageView\u76f8\u5173"},"content":{"rendered":"<pre><code class=\"language-java line-numbers\">public class AdImageView extends AppCompatImageView {\n    private int mDx;\n    private int mMinDx;\n\n    public AdImageView(@NonNull Context context) {\n        super(context);\n    }\n\n    public AdImageView(@NonNull Context context, @Nullable AttributeSet attrs) {\n        super(context, attrs);\n    }\n\n    public AdImageView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {\n        super(context, attrs, defStyleAttr);\n    }\n\n    public void setDx(int dx) {\n        if (getDrawable() == null) {\n            return;\n        }\n        mDx = dx - mMinDx;\n        if (mDx &lt;= 0) {\n            mDx = 0;\n        }\n        if (mDx &gt; getDrawable().getBounds().height() - mMinDx) {\n            mDx = getDrawable().getBounds().height() - mMinDx;\n        }\n        invalidate();\n    }\n    @Override\n    protected void onSizeChanged(int w, int h, int oldw, int oldh) {\n        super.onSizeChanged(w, h, oldw, oldh);\n        mMinDx = h;\n    }\n    public int getDx() {\n        return mDx;\n    }\n    @Override\n    protected void onDraw(Canvas canvas) {\n        Drawable drawable = getDrawable();\n        int w = getWidth();\n        int h = (int) (getWidth() * 1.0f \/ drawable.getIntrinsicWidth() * drawable.getIntrinsicHeight());\n        drawable.setBounds(0, 0, w, h);\n        canvas.save();\n        canvas.translate(0, -getDx());\n        super.onDraw(canvas);\n        canvas.restore();\n    }\n\n    private Bitmap drawableToBitmap(Drawable drawable) {\n        if (drawable instanceof BitmapDrawable) {\n            BitmapDrawable bd = (BitmapDrawable) drawable;\n            return bd.getBitmap();\n        }\n        int w = drawable.getIntrinsicWidth();\n        int h = drawable.getIntrinsicHeight();\n        Bitmap bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);\n        Canvas canvas = new Canvas(bitmap);\n        drawable.setBounds(0, 0, w, h);\n        drawable.draw(canvas);\n        return bitmap;\n    }\n}\n\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>public class AdImageView extends AppCompatImageView { p [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11,8],"tags":[],"class_list":["post-641","post","type-post","status-publish","format-standard","hentry","category-android","category-8"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.4 - 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