做个标记，方便要实现此功能的朋友借鉴，注意图片显示使用自适应fitxy，imageView按照UI给的底图比例动态设置一下宽高，否则屏幕适配显示会异常，分享出去是正常的；
原图
合成后分享的图片
//绘图
private static bitmap setTextToImgForTeacher(Context context, Bundle bundle,int position){
InviteUserBean inviteUserBean = (InviteUserBean) bundle.getSerializable("inviteUserBean");
ArrayList posters = bundle.getStringArrayList("posters");
Bitmap bitmap =base64ToBitmap(posters.get(position));
InviteUserBean.UserDetailsitemBean userDetailsitemBean = inviteUserBean.userDetails.get(position);
Bitmap newBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), bitmap.getConfig());// 创建一个新的和SRC长度宽度一样的位图
Canvas canvas =new Canvas(newBitmap);
canvas.drawBitmap(bitmap, 0,0, null);
//合并二维码 右下角
Bitmap qrBitmap =base64ToBitmap(inviteUserBean.picQRCode);
// Matrix类进行图片处理（缩小或者旋转）
Matrix matrix1 =new Matrix();
// 缩小
matrix1.postScale(0.4f, 0.4f);
// 生成新的二维码图片
Bitmap newQrBitmap = Bitmap.createBitmap(qrBitmap, 0, 0, qrBitmap.getWidth(), qrBitmap.getHeight(), matrix1, true);
// 将二维码图片绘制在右下角
canvas.drawBitmap(newQrBitmap, bitmap.getWidth()-newQrBitmap.getWidth()-20,bitmap.getHeight()-newQrBitmap.getHeight()-30, null);
Paint paintSchoolName =new Paint();
Paint paintInviteCode =new Paint();
Paint paintTeacherName =new Paint();
// 抗锯齿
paintSchoolName.setAntiAlias(true);
paintInviteCode.setAntiAlias(true);
paintTeacherName.setAntiAlias(true);
// 防抖动
paintSchoolName.setDither(true);
paintInviteCode.setDither(true);
paintTeacherName.setDither(true);
paintSchoolName.setColor(Color.parseColor("#ffffff"));
paintInviteCode.setColor(Color.parseColor("#ffffff"));
paintTeacherName.setColor(Color.parseColor("#ffffff"));
paintSchoolName.setTextSize(28);
paintInviteCode.setTextSize(40);
paintTeacherName.setTextSize(22);
// 文字宽
float schoolNameWidth = paintSchoolName.measureText(userDetailsitemBean.schoolName);
float teacherNameWidth = paintTeacherName.measureText(userDetailsitemBean.userName+"老师邀请您使用");
//绘制邀请码
canvas.drawText("邀请码："+inviteUserBean.inviteCode,40,70, paintInviteCode);
//居中绘制学校名称，及教师名称
canvas.translate(bitmap.getWidth() /2, 0);
canvas.drawText(userDetailsitemBean.schoolName,-schoolNameWidth/2,140, paintSchoolName);
canvas.drawText(userDetailsitemBean.userName+"老师邀请您使用",-teacherNameWidth/2,180, paintTeacherName);
return newBitmap;
}
/**
* base64转为bitmap
* @param base64Data
* @return
*/
public static Bitmapbase64ToBitmap(String base64Data) {
byte[] bytes = Base64.decode(base64Data, Base64.DEFAULT);
BitmapFactory.Options options =new BitmapFactory.Options();
TypedValue value=new TypedValue();
options.inTargetDensity = value.density;
options.inScaled =false;//options.inScaled = false; 不因屏幕大小对图像进行放缩
return BitmapFactory.decodeByteArray(bytes, 0, bytes.length ,options);
}
//友盟分享图片
private void share(SHARE_MEDIA platform) {
if (!ShareUtil.isWeixinAvilible(getApplication())) {
ToastUtil.show("请先安装微信客户端");
return;
}
UMImage umImage =new UMImage(this, selectBitmap);
umImage.setThumb(umImage);
new ShareAction(this)
.setPlatform(platform)
.withMedia(umImage)
.share();
}
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