项目总结-重写activity中的onNewIntent 方法

//1，重写activityA中的onNewIntent 方法； 2，把此activityA设置为android:exported=”true” android:launchMode=”singleTask”

  @Override    protected void onNewIntent(Intent intent) {        super.onNewIntent(intent);        int code = intent.getIntExtra("code", -1);        System.out.println("code:="+code);        if (code != 100) {            return;        }        imagePathList.remove(imagePathList.size() - 1);        ArrayList<String> paths = intent.getStringArrayListExtra("paths");        System.out.println("paths:="+paths.get(0));        //添加，去重        boolean hasUpdate = false;        for (String path : paths) {            if (!imagePathList.contains(path)) {                //最多9张                if (imagePathList.size() == 2) {                    toast("最多可上传2张图片。");                    break;                }                imagePathList.add(path);                hasUpdate = true;            }        }        imagePathList.add(path);        if (hasUpdate) {            adapter.notifyDataSetChanged();        }    }

3，在activityB的中操作后，在activityA中会得到ActivityB传过来的数据

if (from.equals("feedback")){                    intent.setClass(activityA.this, activityB.class);                }                System.out.println("paths1:="+paths);                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);                intent.putExtra("code", paths != null ? 100 : 101);                intent.putStringArrayListExtra("paths", paths);                startActivity(intent);