Android 发送邮件内容及主题丢失问题

使用如下方法在很多手机上出现发送的内容及主题丢失：

public static void sendEmail(Context context, String receiver, String subject, String body, File file) {
        try {
            Intent it = new Intent(Intent.ACTION_SENDTO, Uri.parse("mailto:" + receiver)));
            if (!TextUtils.isEmpty(subject)) {
                it.putExtra(Intent.EXTRA_SUBJECT, subject);
            }
            if (!TextUtils.isEmpty(body)) {
                it.putExtra(Intent.EXTRA_TEXT, body);
            }
            File file = new File(file);
            if (file.exists()) {
                it.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));
            }
            context.startActivity(Intent.createChooser(it, "Send Email"));
        } catch (Exception e) {
            Log.e("sendEmail", e);
        }
    }

所以推荐使用如下发送邮件方法：

 public static void sendEmail(Context context, String receiver, String subject, String body, File file) {
        try {
            Intent it = new Intent(Intent.ACTION_SEND);
            it.putExtra(Intent.EXTRA_EMAIL, new String[]{receiver});
            it.setType("*/*");
            if (!TextUtils.isEmpty(subject)) {
                it.putExtra(Intent.EXTRA_SUBJECT, subject);
            }
            if (!TextUtils.isEmpty(body)) {
                it.putExtra(Intent.EXTRA_TEXT, body);
            }
            if (file != null && file.exists()) {
                it.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(file));
            }
            context.startActivity(createEmailOnlyChooserIntent(context,it, receiver，"Send Email"));
        } catch (Exception e) {
            Log.e( "sendEmail", e);
        }
    }

通过匹配进行筛选：

Intent intent = new Intent(Intent.ACTION_SENDTO, Uri.parse("mailto:"+receiver));
getPackageManager().queryIntentActivities(intent, 0);

方法 createEmailOnlyChooserIntent 如下：

public static Intent createEmailOnlyChooserIntent(Context context,Intent source,String receiver,String chooserTitle) {
        Stack<Intent> intents = new Stack<>();
        Intent i = new Intent(Intent.ACTION_SENDTO, Uri.parse("mailto:"+receiver));
        List<ResolveInfo> activities = context.getPackageManager().queryIntentActivities(i, 0);
        for(ResolveInfo ri : activities) {
            Intent target = new Intent(source);
            target.setPackage(ri.activityInfo.packageName);
            intents.add(target);
        }
        if(!intents.isEmpty()) {
            Intent chooserIntent = Intent.createChooser(intents.remove(0), chooserTitle);
            chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intents.toArray(new Parcelable[0]));
            return chooserIntent;
        } else {
            return Intent.createChooser(source, chooserTitle);
        }
    }

最终效果很满意！！