Android 不断缓存我的意图 Extras，如何声明保留新鲜附加值的挂起意图

如何声明保留新鲜附加值的挂起意图

java
public class MainActivity extends AppCompatActivity {
    private static final String EXTRA_DATA = "extra_data";
    private String mData;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        if (savedInstanceState != null) {
            mData = savedInstanceState.getString(EXTRA_DATA);
        }
        // 其他初始化操作
    }
    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putString(EXTRA_DATA, mData);
    }
}

java
public class MainActivity extends AppCompatActivity {
    private static final String EXTRA_DATA = "extra_data";
    private ListView mListView;
    private ArrayList mDataList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mListView = findViewById(R.id.list_view);
        mDataList = new ArrayList<>();
        mDataList.add("Item 1");
        mDataList.add("Item 2");
        mDataList.add("Item 3");
        ArrayAdapter adapter = new ArrayAdapter<>(this,
                android.R.layout.simple_list_item_1, mDataList);
        mListView.setAdapter(adapter);
        mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView parent, View view, int position, long id) {
                String data = mDataList.get(position);
                Intent intent = new Intent(MainActivity.this, DetailActivity.class);
                intent.putExtra(EXTRA_DATA, data);
                startActivity(intent);
            }
        });
        if (savedInstanceState != null) {
            mDataList = savedInstanceState.getStringArrayList(EXTRA_DATA);
        }
    }
    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putStringArrayList(EXTRA_DATA, mDataList);
    }
}

java
public class DetailActivity extends AppCompatActivity {
    private static final String EXTRA_DATA = "extra_data";
    private TextView mTextView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_detail);
        mTextView = findViewById(R.id.text_view);
        Intent intent = getIntent();
        if (intent != null) {
            String data = intent.getStringExtra(EXTRA_DATA);
            mTextView.setText(data);
        }
    }
}