Question

我的应用包含一些(Home)，它们应该水平滚动。我的textViews首次加载但点击layout加载另一个button然后重新点击layout加载第一个{{1} }} 那些button在＆＃34; big＆＃34;之后开始滚动延迟（如20秒+）。我试图用layout，textViews等来弄清楚这个问题的来源，但没有运气。

更新：我今天注意到一些奇怪的事情。当我从第一个布局转到第二个布局时，反之亦然，尽管TextViews停止滚动，如果我关闭并重新打开手机＆＃39 ; s屏幕，滚动效果就像一个魅力。这对我来说似乎很奇怪，你知道造成这种情况的原因和原因吗？

CardViewActivity.java：

Layout Inspector

firstLayout.xml：

Hierarchy Viewer

SecondLayout.xml：

public class CardViewActivity extends AppCompatActivity {

private ImageView cardArtImageView;
private TextView leaderSkillDescText;
private TextView superAttackTitleText;
private TextView superAttackDescText;
private TextView passiveSkillTitleText;
private TextView passiveSkillDescText;
private TextView hpText;
private TextView attText;
private TextView defText;
private TextView costText;
private Button arrowButton;
private int selectedItemPosition;
private boolean isBtnClicked = false;

// Listener member field for each layout's button. This listener will be used recursively
private View.OnClickListener arrowButtonListener = new View.OnClickListener() {
    @Override
    public void onClick(View view) {
        // When the arrowButton is clicked, choose the right layout based on the button's state
        int resID = isBtnClicked ? R.layout.cardview_refined : R.layout.cardview_expand_details;

        setContentView(resID);

        // If we're in the first layout, initialize the cardArtImageView field
        if(isBtnClicked) {
            cardArtImageView = findViewById(R.id.cardArtImageView);
        }

        viewDefinitions(!isBtnClicked);
        initCardViewData(selectedItemPosition);
        setSelectedViewsInit();

        // Set the arrowButton's listener to this listener (recursively)
        arrowButton.setOnClickListener(arrowButtonListener);

        // toggle our flag field
        isBtnClicked = !isBtnClicked;
    }
};

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.cardview_refined);

    // Retrieving the data sent over from MainActivity
    Intent intent = getIntent();
    Bundle bundle = intent.getExtras();

    if (bundle != null) {
        selectedItemPosition = bundle.getInt("Card Index");
    }
    //Toast.makeText(this, "WIDTH: " + SCREEN_WIDTH, Toast.LENGTH_SHORT).show();

    // Initializing our views
    cardArtImageView = findViewById(R.id.cardArtImageView);
    viewDefinitions(false);
    setSelectedViewsInit();

    initCardViewData(selectedItemPosition);

    arrowButton.setOnClickListener(arrowButtonListener);
}

/**
 * Sets the required textViews as selected to allow automatic scrolling
 */
private void setSelectedViewsInit() {
    leaderSkillDescText.setSelected(true);
    superAttackTitleText.setSelected(true);
    superAttackDescText.setSelected(true);
    if (passiveSkillTitleText != null && passiveSkillDescText != null) {
        passiveSkillTitleText.setSelected(true);
        passiveSkillDescText.setSelected(true);
    }
}

/**
 * Adds the views's definitions
 *
 * @param initPassiveInfo used to decide whether or not the passiveSkillDesc & ..Title != null
 *                        so that they can be defined
 */
private void viewDefinitions(boolean initPassiveInfo) {
    leaderSkillDescText = findViewById(R.id.leaderSkillDesc);
    superAttackTitleText = findViewById(R.id.superAttackTitle);
    superAttackDescText = findViewById(R.id.superAttackDesc);
    if (initPassiveInfo) {
        passiveSkillTitleText = findViewById(R.id.passiveSkillTitle);
        passiveSkillDescText = findViewById(R.id.passiveSkillDesc);
    } else {
        Log.d("Definitions", "Passive info == null");
    }
    hpText = findViewById(R.id.HP);
    attText = findViewById(R.id.ATT);
    defText = findViewById(R.id.DEF);
    costText = findViewById(R.id.COST);
    arrowButton = findViewById(R.id.arrowButton);
}

/**
 * Initialize the cardViewActivity's views with the data from the CardInfoDatabase.java class
 *
 * @param selectedItemPosition Used to initialize this activity's views if the intent was called from the MainScreen Fragment
 */
private void initCardViewData(int selectedItemPosition) {
    if (cardArtImageView != null) {
        cardArtImageView.setImageResource(CardInfoDatabase.cardArts[selectedItemPosition]);
    }
    leaderSkillDescText.setText(CardInfoDatabase.leaderSkills[selectedItemPosition]);
    superAttackTitleText.setText(CardInfoDatabase.superAttacksName[selectedItemPosition]);
    superAttackDescText.setText(CardInfoDatabase.superAttacksDesc[selectedItemPosition]);
    if (passiveSkillTitleText != null && passiveSkillDescText != null) {
        passiveSkillTitleText.setText(CardInfoDatabase.passiveSkillsName[selectedItemPosition]);
        passiveSkillDescText.setText(CardInfoDatabase.passiveSkillsDesc[selectedItemPosition]);
    }
    hpText.setText(CardInfoDatabase.hp[selectedItemPosition].toString());
    attText.setText(CardInfoDatabase.att[selectedItemPosition].toString());
    defText.setText(CardInfoDatabase.def[selectedItemPosition].toString());
    costText.setText(CardInfoDatabase.cost[selectedItemPosition].toString());
}
}

Answer 1

我建议使用带有自定义适配器的RecyclerView，可以垂直或水平使用RecyclerView。

水平滚动文本性能问题

1 个答案: