[英]invalidate() does not changes content of custom view immediately
我有一個包含自定義視圖的xml布局:
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="0dip"
android:orientation="vertical"
android:layout_weight="50"
>
<org.example.sudoku.PuzzleView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/puzzlebackground"
android:id="@+id/puzzleId"/>
</LinearLayout>
我有一個活動,將這種布局設置為其內容,並調用一個對話框以供用戶輸入,該對話框又調用了PuzzleView中的一個函數,最終改變了PuzzleView的內容。 問題在於,關閉對話框后,更改尚未重新繪制。 相反,它會在用戶的下一個其他輸入上重繪。 以下是一些可以幫助您的代碼段:
Game.java:
// ...
public void showKeypadOrError(int x, int y)
{
int tiles[] = getUsedTiles(x,y);
if (tiles.length == 9)
{
Toast toast = Toast.makeText(this, R.string.no_moves_label, Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER, 0, 0);
toast.show();
}else
{
Log.d(TAG, "showKeypad: used=" + toPuzzleString(tiles));
Dialog v = new Keypad(this, this.puzzleView, x, y);
v.show();
}
}
public void setTile(int x, int y, int value) {
puzzle[y * 9 + x] = value;
}
Keypad.java:
private void setListeners()
{
for (int i = 0; i < keys.length; i++)
{
final int t = i + 1;
keys[i].setOnClickListener(new View.OnClickListener() {
public void onClick(View v)
{
returnResult(t);
}
});
}
}
private void returnResult(int tile)
{
puzzleView.setSelectedTile(selX, selY, tile);
puzzleView.invalidate();
dismiss();
}
最后,PuzzleView.java
public void setSelectedTile(int X, int Y, int tile) {
game.setTile(X, Y, tile);
//this.invalidate();// may change hints
}
我發現了一個看起來與我的問題相似的問題,但我不知道解決方案是什么:
非常感謝您的幫助! 編輯:添加更多代碼-希望此幫助:PuzzleView.java
// Handle input in touch mode
@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction() != MotionEvent.ACTION_DOWN) {
return super.onTouchEvent(event);
}
// Allow player to choose the tile that defined by game
// But only allow the user to modify the tiles that are blank
select((int) (event.getX() / width),
(int) (event.getY() / height));
int[] predefined = new int[81];
// Get the tile that are not blank (predefined by game)
predefined = game.getPredefinedTileFromPuzzle();
// Check if the selected tile is whether predefined or not
if (predefined[selY * 9 + selX] == 1) {
return true;
}
//Call the Dialog input from Game.java
game.showKeypadOrError(selX, selY);
Log.i(TAG, "Right before terminate onTouchEvent()");
return true;
}
取消對話框后,您應該使之無效。
實現DialogInterface.OnDismissListener
接口,並在OnDismiss
回調中使其無效。
Dialog v = new Keypad(this, this.puzzleView, x, y);
v.setOnDismissListener(new OnDismissListener() {
@Override
public void onDismiss(final DialogInterface arg0) {
puzzleView.postInvalidate ();
}
});
v.show();
只是做puzzleView.requestLayout();
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