savedInstanceState 根据之前的用户操作更改颜色
savedInstanceState changes colors based on previous user actions
我有三个按钮,第一个 selected 按钮用 X 标记,而第二个 selected 按钮将用 O 标记,最后一个按钮再次标记为 X .
如果标记为 X,则其颜色为白色,如果标记为 O,则标记为灰色。
现在我想做的是使用保存的实例,这样当我旋转 phone 时,颜色会保持原样。实际发生的情况是,如果我旋转 phone 然后制作最新的 selection,所有文本都会恢复为该颜色。
因此,如果我按下 X 和 O 并旋转 phone,X 和 O 都将显示为灰色,即 O 的颜色。
如果我然后 select 最后一个 X 并旋转 phone,所有字母将被标记为白色,这是 X 的颜色。
我不确定是不是设置的颜色导致的,或者是记住了之前是谁移动了它并根据它设置了颜色,我的问题是如何解决这个问题,让所有的字母都保持颜色旋转?
private boolean playerOneMove = true;
private Button[][] buttons = new Button[1][3];
private static final String TEXT_COLOR = "textColor";
private String textColor;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_player2);
btnObj1 = findViewById(R.id.button_00);
btnObj2 = findViewById(R.id.button_01);
btnObj3 = findViewById(R.id.button_02);
if (savedInstanceState != null) {
textColor = savedInstanceState.getString(TEXT_COLOR);
if(btnObj1 != null) {
btnObj1.setTextColor(Color.parseColor(textColor));
}
if (btnObj2 != null) {
btnObj2.setTextColor(Color.parseColor(textColor));
}
if (btnObj3 != null) {
btnObj3.setTextColor(Color.parseColor(textColor));
}
for (int i = 0; i < 1; i++) {
for (int j = 0; j < 3; j++) {
String buttonID = "button_" + i + j;
int resID = getResources().getIdentifier(buttonID, "id", getPackageName());
buttons[i][j] = findViewById(resID);
buttons[i][j].setOnClickListener(this);
}
}
}
@Override
public void onClick(View v) {
if (!((Button) v).getText().toString().equals("")) {
return;
}
if (playerOneMove) {
((Button) v).setText("X");
textColor = "#e8e5e5";
((Button) v).setTextColor(Color.parseColor(textColor));
} else {
((Button) v).setText("O");
textColor = "#737374";
((Button) v).setTextColor(Color.parseColor(textColor));
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putBoolean("playerOneMove", playerOneMove);
outState.putString(TEXT_COLOR, textColor);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) { ;
super.onRestoreInstanceState(savedInstanceState);
playerOneMove = savedInstanceState.getBoolean("playerOneMove");
textColor = savedInstanceState.getString(TEXT_COLOR);
}
您看到的行为是正常的,因为您保存了一个 textColor,它始终是用户最后设置的那个。相反,您可以简单地遍历按钮数组并保存每个按钮的文本颜色:
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
for (int i = 0; i < 1; i++) {
for (int j = 0; j < 3; j++) {
String buttonID = "button_" + i + j;
Button btn = buttons[i][j];
outState.putCharSequence(buttonID, btn.getText());
}
}
}
然后在onCreate()中(去掉onRestoreInstanceState()方法)恢复按钮的状态:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_player2);
int playerX = Color.parseColor("#e8e5e5");
int playerO = Color.parseColor("#737374");
for (int i = 0; i < 1; i++) {
for (int j = 0; j < 3; j++) {
String buttonID = "button_" + i + j;
int resID = getResources().getIdentifier(buttonID, "id", getPackageName());
buttons[i][j] = findViewById(resID);
buttons[i][j].setOnClickListener(this);
if (savedInstanceState != null) {
String btnState = savedInstanceState.getCharSequence(buttonID);
if (btnState.equals("X")) {
// this is player X
buttons[i][j].setTextColor(playerX);
} else if (btnState.equals("O")) {
// this is player O
buttons[i][j].setTextColor(playerO);
} else {
// unclicked btn, do you have another color?
}
}
}
}
如果您有更多的按钮,将按钮状态分组并保存在列表中而不是单独的按钮状态可能更有意义。
我有三个按钮,第一个 selected 按钮用 X 标记,而第二个 selected 按钮将用 O 标记,最后一个按钮再次标记为 X .
如果标记为 X,则其颜色为白色,如果标记为 O,则标记为灰色。
现在我想做的是使用保存的实例,这样当我旋转 phone 时,颜色会保持原样。实际发生的情况是,如果我旋转 phone 然后制作最新的 selection,所有文本都会恢复为该颜色。
因此,如果我按下 X 和 O 并旋转 phone,X 和 O 都将显示为灰色,即 O 的颜色。
如果我然后 select 最后一个 X 并旋转 phone,所有字母将被标记为白色,这是 X 的颜色。
我不确定是不是设置的颜色导致的,或者是记住了之前是谁移动了它并根据它设置了颜色,我的问题是如何解决这个问题,让所有的字母都保持颜色旋转?
private boolean playerOneMove = true;
private Button[][] buttons = new Button[1][3];
private static final String TEXT_COLOR = "textColor";
private String textColor;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_player2);
btnObj1 = findViewById(R.id.button_00);
btnObj2 = findViewById(R.id.button_01);
btnObj3 = findViewById(R.id.button_02);
if (savedInstanceState != null) {
textColor = savedInstanceState.getString(TEXT_COLOR);
if(btnObj1 != null) {
btnObj1.setTextColor(Color.parseColor(textColor));
}
if (btnObj2 != null) {
btnObj2.setTextColor(Color.parseColor(textColor));
}
if (btnObj3 != null) {
btnObj3.setTextColor(Color.parseColor(textColor));
}
for (int i = 0; i < 1; i++) {
for (int j = 0; j < 3; j++) {
String buttonID = "button_" + i + j;
int resID = getResources().getIdentifier(buttonID, "id", getPackageName());
buttons[i][j] = findViewById(resID);
buttons[i][j].setOnClickListener(this);
}
}
}
@Override
public void onClick(View v) {
if (!((Button) v).getText().toString().equals("")) {
return;
}
if (playerOneMove) {
((Button) v).setText("X");
textColor = "#e8e5e5";
((Button) v).setTextColor(Color.parseColor(textColor));
} else {
((Button) v).setText("O");
textColor = "#737374";
((Button) v).setTextColor(Color.parseColor(textColor));
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putBoolean("playerOneMove", playerOneMove);
outState.putString(TEXT_COLOR, textColor);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) { ;
super.onRestoreInstanceState(savedInstanceState);
playerOneMove = savedInstanceState.getBoolean("playerOneMove");
textColor = savedInstanceState.getString(TEXT_COLOR);
}
您看到的行为是正常的,因为您保存了一个 textColor,它始终是用户最后设置的那个。相反,您可以简单地遍历按钮数组并保存每个按钮的文本颜色:
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
for (int i = 0; i < 1; i++) {
for (int j = 0; j < 3; j++) {
String buttonID = "button_" + i + j;
Button btn = buttons[i][j];
outState.putCharSequence(buttonID, btn.getText());
}
}
}
然后在onCreate()中(去掉onRestoreInstanceState()方法)恢复按钮的状态:
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_player2);
int playerX = Color.parseColor("#e8e5e5");
int playerO = Color.parseColor("#737374");
for (int i = 0; i < 1; i++) {
for (int j = 0; j < 3; j++) {
String buttonID = "button_" + i + j;
int resID = getResources().getIdentifier(buttonID, "id", getPackageName());
buttons[i][j] = findViewById(resID);
buttons[i][j].setOnClickListener(this);
if (savedInstanceState != null) {
String btnState = savedInstanceState.getCharSequence(buttonID);
if (btnState.equals("X")) {
// this is player X
buttons[i][j].setTextColor(playerX);
} else if (btnState.equals("O")) {
// this is player O
buttons[i][j].setTextColor(playerO);
} else {
// unclicked btn, do you have another color?
}
}
}
}
如果您有更多的按钮,将按钮状态分组并保存在列表中而不是单独的按钮状态可能更有意义。