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我是Android的初學者，嘗試製作一個簡單的井字遊戲。在遊戲中的任何時候，當用戶雙擊一個ImageView時，我希望圖像改變（即）X將變爲O，O將變爲X.我如何實現？圖像視圖上的DoubleTap手勢
這裏是我的代碼
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.GestureDetector;
import android.view.GestureDetector.OnGestureListener;
import android.view.MotionEvent;
import android.view.View;
import android.widget.GridLayout;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import android.support.v4.view.GestureDetectorCompat;
public class MainActivity extends AppCompatActivity implements OnGestureListener ,GestureDetector.OnDoubleTapListener {
private GestureDetectorCompat gestureDetector;
int activePlayer =0; // if its 0 -> Cross , if its 1 -> circle
boolean gameActive = true;
int[] gameState ={2,2,2,2,2,2,2,2,2};
int[][] winningPosition = {{0,1,2},{3,4,5},{6,7,8},{0,4,8},{2,4,6},{0,3,6},{1,4,7},{2,5,8}};
ImageView counter;
public void dropIn (View view) {
counter = (ImageView) view;
System.out.println(counter.getTag().toString());
int tapCounter = Integer.parseInt(counter.getTag().toString());
if (gameState[tapCounter] == 2 && gameActive) {
gameState[tapCounter] = activePlayer;
counter.setTranslationY(-1000f);
if (activePlayer == 0) {
counter.setImageResource(R.drawable.o);
activePlayer = 1;
} else {
counter.setImageResource(R.drawable.a);
activePlayer = 0;
}
counter.animate().translationYBy(1000f).setDuration(600);
for(int[] winningPositions : winningPosition)
{
if(gameState[winningPositions[0]] == gameState[winningPositions[1]] && gameState[winningPositions[1]] == gameState[winningPositions[2]]
&& gameState[winningPositions[1]] != 2)
{
String winner = "Player 1";
gameActive = false;
if(gameState[winningPositions[0]] == 1)
{
winner = "Player 2";
}
TextView winnerMessage = (TextView) findViewById(R.id.winnerMessage);
winnerMessage.setText(winner + " has won !");
RelativeLayout hiddenLayout = (RelativeLayout)findViewById(R.id.playAgainLayout);
hiddenLayout.setVisibility(View.VISIBLE);}
else
{
boolean gameOver = true;
for(int counterState : gameState)
{
if(counterState == 2)
gameOver = false;
}
if(gameOver)
{
TextView winnerMessage = (TextView) findViewById(R.id.winnerMessage);
winnerMessage.setText("Its a draw");
RelativeLayout hiddenLayout = (RelativeLayout)findViewById(R.id.playAgainLayout);
hiddenLayout.setVisibility(View.VISIBLE);
}
}
}
}
}
@Override
public boolean onDoubleTap(MotionEvent e) {
if(gameState[0] ==0 || gameState[1] ==0 || gameState[2] ==0)
{
for (int i = 0;i<9;i++)
{
if(gameState[i] == 0)
{
counter.setImageResource(0);
counter.setImageResource(R.drawable.a);
gameState[i]=1;
}
else {
counter.setImageResource(R.drawable.a);
gameState[i]=0;
}
}
}
return true;
}
@Override
public boolean onDoubleTapEvent(MotionEvent e) {
Toast.makeText(getApplicationContext(),"Double Tap Event",Toast.LENGTH_LONG).show();
return true;
}
@Override
public boolean onSingleTapConfirmed(MotionEvent e) {
return false;
}
public void exit()
{
Intent intent = new Intent(this, IntroActivity.class);
startActivity(intent);
}
public void playAgain(View view)
{
RelativeLayout hiddenLayout = (RelativeLayout)findViewById(R.id.playAgainLayout);
hiddenLayout.setVisibility(View.INVISIBLE);
activePlayer =0;
gameActive=true;
for(int i=0;i<gameState.length;i++)
{
gameState[i]=2;
}
GridLayout tableGrid = (GridLayout) findViewById(R.id.tableBorder);
for(int i=0;i<tableGrid.getChildCount();i++)
{
((ImageView) tableGrid.getChildAt(i)).setImageResource(0);
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.gestureDetector = new GestureDetectorCompat(this,this);
gestureDetector.setOnDoubleTapListener(this);
}
@Override
public boolean onDown(MotionEvent e) {
return false;
}
@Override
public void onShowPress(MotionEvent e) {
}
@Override
public boolean onSingleTapUp(MotionEvent e) {
return false;
}
@Override
public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
return false;
}
@Override
public void onLongPress(MotionEvent e) {
}
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
return false;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
this.gestureDetector.onTouchEvent(event);
return super.onTouchEvent(event);
}
}
我的XML代碼：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.adarshjayakumar.mygame.MainActivity"
android:background="#f2eddc">
<GridLayout
android:layout_width="302dp"
android:layout_height="302dp"
android:columnCount="3"
android:rowCount="3"
android:layout_alignParentLeft="false"
android:layout_alignParentTop="false"
android:layout_centerInParent="true"
android:layout_alignParentRight="false"
android:background="@drawable/able"
android:id="@+id/tableBorder">
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:id="@+id/imageView"
android:layout_row="0"
android:layout_column="0"
android:tag="0"
android:onClick="dropIn"
/>
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:id="@+id/imageView1"
android:layout_row="0"
android:layout_column="1"
android:tag="1"
android:onClick="dropIn" />
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:id="@+id/imageView2"
android:layout_row="0"
android:layout_column="2"
android:tag="2"
android:onClick="dropIn" />
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:id="@+id/imageView3"
android:layout_row="1"
android:layout_column="0"
android:tag="3"
android:onClick="dropIn" />
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:id="@+id/imageView4"
android:layout_row="1"
android:layout_column="1"
android:tag="4"
android:onClick="dropIn" />
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:id="@+id/imageView5"
android:layout_row="1"
android:layout_column="2"
android:tag="5"
android:onClick="dropIn" />
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:id="@+id/imageView6"
android:layout_row="2"
android:layout_column="0"
android:tag="6"
android:onClick="dropIn" />
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:id="@+id/imageView7"
android:layout_row="2"
android:layout_column="1"
android:tag="7"
android:onClick="dropIn" />
<ImageView
android:layout_width="100dp"
android:layout_height="100dp"
android:id="@+id/imageView8"
android:layout_row="2"
android:layout_column="2"
android:tag="8"
android:onClick="dropIn" />
</GridLayout>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="0dp"
android:layout_alignParentBottom="false"
android:layout_centerVertical="true"
android:background="#f96262"
android:id="@+id/playAgainLayout"
android:visibility="invisible">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Game Over"
android:id="@+id/textView"
android:textSize="20dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:textStyle="bold" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Play Again"
android:id="@+id/button"
android:layout_marginTop="60dp"
android:layout_marginLeft="0dp"
android:layout_marginRight="0dp"
android:layout_below="@+id/textView"
android:layout_alignParentStart="true"
android:layout_marginStart="48dp"
android:onClick="playAgain" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Exit"
android:id="@+id/button2"
android:layout_alignTop="@+id/button"
android:layout_toEndOf="@+id/textView"
android:onClick="exit" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Play 1 has won"
android:id="@+id/winnerMessage"
android:layout_above="@+id/button2"
android:layout_centerHorizontal="true"
android:layout_margin="20dp"
android:textSize="18dp" />
</RelativeLayout>
</RelativeLayout>