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);    }}