SpannableStringBuilder实现图文混排

2021-02-26  本文已影响0人  Gankers

代码

public class MainActivity extends AppCompatActivity {
    private TextView text;
    private static Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
    }

    private void initView() {
        text = findViewById(R.id.text);
        String msg = "吴彦祖的情侣";
        String nick = "吴彦祖";
        String vip = "vip";
        String manager = "管";
        String content = " 哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈";
        String space = "  ";    //添加空格使各个图片标示有间隔
        float scale = getResources().getDisplayMetrics().density;
        paint.setTextSize((int) (12 * scale));
        paint.setColor(getResources().getColor(R.color.white));
        Rect textBound = new Rect();
        paint.getTextBounds(msg, 0, msg.length(), textBound);
        Log.d("MainActivity", "bound = " + textBound);
        int lineHeight = text.getLineHeight();
        int padding = (int)(8 * scale);
        Bitmap bitmap = Bitmap.createBitmap(textBound.width() + padding * 2, lineHeight, Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        NinePatchDrawable backgroundDrawable = (NinePatchDrawable)getResources().getDrawable(R.mipmap.yidui_img_sweetheart_bg);
        backgroundDrawable.setBounds(new Rect(0, 0, textBound.width() + padding * 2, lineHeight));
        backgroundDrawable.draw(canvas);
        canvas.drawText(msg, padding, canvas.getHeight() / 2f + (Math.abs(paint.ascent()) - paint.descent()) / 2, paint);
        SpannableStringBuilder str = new SpannableStringBuilder();

        str.append(msg);
        int start = 0;
        int end = msg.length();
        ImageSpan imageSpan = new ImageSpan(this, bitmap);
        str.setSpan(imageSpan, start, end, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);


        str.append(space);
        str.append(vip);
        start = end + space.length();
        end +=  vip.length() + space.length();
        Drawable vipDrawable = getResources().getDrawable(R.mipmap.ic_new_vip);
        vipDrawable.setBounds( 0 , 0 , 100 , lineHeight);
        ImageSpan vipImageSpan = new ImageSpan(vipDrawable);
        str.setSpan(vipImageSpan, start, end, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);

        str.append(space);
        str.append(manager);
        start = end + space.length();
        end +=  manager.length() + space.length();
        Drawable managerDrawable = getResources().getDrawable(R.mipmap.yidui_live_manager_icon);
        managerDrawable.setBounds( 0 , 0 , 70 , lineHeight);
        ImageSpan managerImageSpan = new ImageSpan(managerDrawable);
        str.setSpan(managerImageSpan, start, end, Spanned.SPAN_INCLUSIVE_EXCLUSIVE);

        str.append(space);
        str.append(nick);
        start = end + space.length();
        end += + nick.length() + space.length();
        ForegroundColorSpan nickColorSpan = new ForegroundColorSpan(Color.parseColor("#A4DFEB"));
        str.setSpan(nickColorSpan ,start , end ,Spanned.SPAN_INCLUSIVE_EXCLUSIVE);

        str.append(content);
        start = end;
        end += content.length();
        ForegroundColorSpan contentColorSpan = new ForegroundColorSpan(Color.parseColor("#BBBFEB"));
        str.setSpan(contentColorSpan , start , end ,Spanned.SPAN_INCLUSIVE_EXCLUSIVE);
        text.setText(str);
    }
}

样式


企业微信截图_14baa40a-94dc-44a1-a7d4-bede0bba4088.png
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