[移动开发]Android Studio如何在不同的Activity中传送数据

Android Studio如何在不同Activity中传送数据，一般我就用两种，一种是直接传送

        Intent intent = new Intent(ChooseMode.this, ConfigData.class);
        intent.putExtra(SHARE_NAME,FileName);
        startActivity(intent);

对端取：

        if (getIntent()!=null)
        {
            SharedPreferencesName = getIntent().getStringExtra(ChooseMode.SHARE_NAME);
        }

另外一种就是借助Bundle，一个Bundle可以传很多数据，具体看代码；

        Intent intent = new Intent(ConfigData.this, MainActivity.class);
        Bundle DataPackege = new Bundle();
        DataPackege.putString("DataPath",DataPath);
        DataPackege.putBoolean("Mode",Mode);
        DataPackege.putFloat("HYCS",HYCS);
        DataPackege.putInt("NumKs",NumKs);
        DataPackege.putFloat("MinUnits",MinUnits);
        startActivity(intent);

对端取：

        if (getIntent()!=null)
        {
            Bundle dataPackege = getIntent().getBundleExtra(ConfigData.CONFIG_DATA);
            if (dataPackege!=null)
            {
                String datapath = dataPackege.getString("DataPath","");
                boolean mode = dataPackege.getBoolean("Mode",true);
                float hycs = dataPackege.getFloat("HYCS",10.0f);
                int numks = dataPackege.getInt("NumKs",100);
                float minunits = dataPackege.getFloat("MinUnits",1.0f);
                }
        }

如果A Activity需要打开一个Activity B，然后再关闭这个B Activity,B Activity再把数据传给A；
需要这样做：
A端：

			Intent intent = new Intent(ConfigData.this, FileBrowserActivity.class);
			intent.putExtra("area", false);
			startActivityForResult(intent, FILE_RESULT_CODE);

并回调：

    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (FILE_RESULT_CODE == requestCode) {
            	Bundle bundle = data.getExtras();
                String path = bundle.getString("file");
            }
        }
    }

B端：

                    Intent data = new Intent(FileBrowserActivity.this, MainActivity.class);
                    Bundle bundle = new Bundle();
                    bundle.putString("file", file.getPath());
                    data.putExtras(bundle);
                    setResult(2, data);
                    finish();