支持富文本插入图片，文本的自定义Ｖiew

在比较潮流的Ａpp中，我们经常看到富文本的身影，能支持图文混排，其实图文混排不是那么难，这段时间由于项目的需要，我自己实现了图文混排，即能支持插入图排，又可以编辑文本。其实原理很简单，把ＩmageView跟ＥditText动态加入一个layout容器里面，然后根据最近的焦点来添加view，具体请看我的view，里面已经注释很清楚了。

public class RichTextView extends ScrollView {
    private static final int EDIT_PADDING = 10; // edittext常规padding是10dp

    private int viewTagIndex = 1; // 新生的view都会打一个tag，对每个view来说，这个tag是唯一的。
    private LinearLayout allLayout; // 这个是所有子view的容器，scrollView内部的唯一一个ViewGroup
    private LayoutInflater inflater;
    private int editNormalPadding = 0; //

    public RichTextView(Context context) {
        this(context, null);
    }

    public RichTextView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public RichTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        inflater = LayoutInflater.from(context);

        // 1. 初始化allLayout
        allLayout = new LinearLayout(context);
        allLayout.setOrientation(LinearLayout.VERTICAL);
        //allLayout.setBackgroundColor(Color.WHITE);//去掉背景
        LayoutParams layoutParams = new LayoutParams(LayoutParams.MATCH_PARENT,
                LayoutParams.WRAP_CONTENT);
        allLayout.setPadding(50,15,50,15);//设置间距，防止生成图片时文字太靠边
        addView(allLayout, layoutParams);

        LinearLayout.LayoutParams firstEditParam = new LinearLayout.LayoutParams(
                LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
        //editNormalPadding = dip2px(EDIT_PADDING);
        TextView firstText = createTextView("没有内容", dip2px(context, EDIT_PADDING));
        allLayout.addView(firstText, firstEditParam);
    }

    public int dip2px(Context context, float dipValue) {
        float m = context.getResources().getDisplayMetrics().density;
        return (int) (dipValue * m + 0.5f);
    }

    /**
     * 清除所有的view
     */
    public void clearAllLayout(){
        allLayout.removeAllViews();
    }

    /**
     * 获得最后一个子view的位置
     * @return
     */
    public int getLastIndex(){
        int lastEditIndex = allLayout.getChildCount();
        return lastEditIndex;
    }

    /**
     * 生成文本输入框
     */
    public TextView createTextView(String hint, int paddingTop) {
        TextView textView = (TextView) inflater.inflate(R.layout.rich_textview, null);
        textView.setTag(viewTagIndex++);
        textView.setPadding(editNormalPadding, paddingTop, editNormalPadding, paddingTop);
        textView.setHint(hint);
        return textView;
    }

    /**
     * 生成图片View
     */
    private RelativeLayout createImageLayout() {
        RelativeLayout layout = (RelativeLayout) inflater.inflate(
                R.layout.edit_imageview, null);
        layout.setTag(viewTagIndex++);
        View closeView = layout.findViewById(R.id.image_close);
        closeView.setVisibility(GONE);
        return layout;
    }

    /**
     * 在特定位置插入EditText
     *
     * @param index
     *            位置
     * @param editStr
     *            EditText显示的文字
     */
    public void addTextViewAtIndex(final int index, CharSequence editStr) {
        TextView textView = createTextView("", EDIT_PADDING);
        textView.setText(editStr);

        allLayout.addView(textView, index);
    }

    /**
     * 在特定位置添加ImageView
     */
    public void addImageViewAtIndex(final int index, String imagePath) {
        Bitmap bmp = BitmapFactory.decodeFile(imagePath);

        final RelativeLayout imageLayout = createImageLayout();
        DataImageView imageView = (DataImageView) imageLayout.findViewById(R.id.edit_imageView);
        Glide.with(getContext()).load(imagePath).crossFade().centerCrop().into(imageView);
        //imageView.setImageBitmap(bmp);//这里改用Glide加载图片
        //imageView.setBitmap(bmp);//这句去掉，保留下面的图片地址即可，优化图片占用
        imageView.setAbsolutePath(imagePath);

        // 调整imageView的高度
        int imageHeight = allLayout.getWidth() * bmp.getHeight() / bmp.getWidth();
        RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
                LayoutParams.MATCH_PARENT, imageHeight);
        lp.bottomMargin = 10;
        imageView.setLayoutParams(lp);

        allLayout.addView(imageLayout, index);
    }

    /**
     * 根据view的宽度，动态缩放bitmap尺寸
     *
     * @param width
     *            view的宽度
     */
    public Bitmap getScaledBitmap(String filePath, int width) {
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(filePath, options);
        int sampleSize = options.outWidth > width ? options.outWidth / width
                + 1 : 1;
        options.inJustDecodeBounds = false;
        options.inSampleSize = sampleSize;
        return BitmapFactory.decodeFile(filePath, options);
    }

}