java - Arraylist 到字符串并返回到 arraylist

Question

我想将 (TestObject) 的 ArrayList 转换为字符串，反之亦然。我还附上了主要 Activity ，以便您可以看到我想要创建的方法。

MainActivity:ArrayList 的创建位置，需要转换为 String。

public class MainActivity extends AppCompatActivity {
ArrayList<TestObject> testObjects;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    testObjects = new ArrayList<>();
    testObjects.add(new TestObject("Name1", "Attribute1"));
    testObjects.add(new TestObject("Example", "Example"));
}


private String convertObjectArrayToString(ArrayList<TestObject> arrayToBeConverted){
    return null;
}

private ArrayList<TestObject> convertStringToObjectArray(){

    return null;
}

}

ArrayList 中的对象:

public class TestObject {

private String name;
private String attribute;

TestObject(String name, String attribute){
    this.name = name;
    this.attribute = attribute;
}

public void setAttribute(String attribute) {
    this.attribute = attribute;
}

public void setName(String name) {
    this.name = name;
}

public String getName() {
    return name;
}

public String getAttribute() {
    return attribute;
}
}

Answer 1

//ArrayList 到字符串转换:

String listToJson = new Gson().toJson(testObjects);

//ViceVersa字符串获取数组列表:

Type listType = new TypeToken<List>() {}.getType();

List myModelList = new Gson().fromJson(listToJson, listType);

更新:

 myModelList = gson.fromJson(br, new TypeToken<ArrayList< TestObject >>(){}.getType());