我正在尝试制作一个3x3网格布局的图像(ImageView),一旦用户点击任何图像,该图像上的照片就会发生变化,我面临的问题是我找不到参考到被点击的图像,以便我可以更改它上面的照片。我想写的游戏是一个简单的tic tac toe
1)这是我的主要活动的代码
package eg.edu.guc;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
//import android.widget.Toast
public class AndXOActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
GridView gridView = (GridView) findViewById(R.id.gridview);
// Instance of ImageAdapter Class
gridView.setAdapter(new ImageAdapter(this));
gridView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
//Toast.makeText(AndXOActivity.this, "" + position, Toast.LENGTH_SHORT).show();
//ImageView imageView = new ImageView(getMContext());
getImageView().setImageResource(R.drawable.x);
}
});
}
}
2)以下是ImageAdapter类的代码
import android.content.Context;
import android.database.DataSetObserver;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
public class ImageAdapter extends BaseAdapter {
private Context mContext;
public ImageView imageView;
public ImageView getImageView() {
return imageView;
}
// Keep all Images in array
public Integer[] mThumbIds = {
R.drawable.sample_0, R.drawable.sample_1,
R.drawable.sample_2, R.drawable.sample_3,
R.drawable.sample_4, R.drawable.sample_5,
R.drawable.sample_6, R.drawable.sample_7,
R.drawable.x, R.drawable.o
};
// Constructor
public ImageAdapter(Context c){
mContext = c;
}
public Context getMContext() {
return mContext;
}
@Override
public int getCount() {
return mThumbIds.length;
}
@Override
public Object getItem(int position) {
return mThumbIds[position];
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
imageView = new ImageView(mContext);
imageView.setImageResource(R.drawable.tile);
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setLayoutParams(new GridView.LayoutParams(70, 70));
return imageView;
}
}
3)这是.xml文件
<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/gridview"
android:layout_width="150dp"
android:layout_gravity="center"
android:layout_height="150dp"
android:columnWidth="90dp"
android:numColumns="3"
android:verticalSpacing="5dp"
android:horizontalSpacing="5dp"
android:gravity="center"
/>
请告诉我,一旦点击ImageView,我该怎么做才能改变图像!
答案 0 :(得分:0)
1。循环遍历ImageViews本身,为它们提供所有相同的OnClickListener,但也使用您拥有的图像数组的索引标记它们。在侦听器中,获取标记,索引到数组中,执行您现在需要做的事情,因为您知道与ImageView关联的图像,更改标记。
一个例子:
@Override
public void onCreate(Bundle bundle) {
super.onCreate(bundle);
setContentView(R.layout.select);
OnClickListener listener = new OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(SelectActivity.this, QuizActivity.class);
i.putExtra("quiz#", ((Integer) v.getTag()).intValue()); // <------
i.putExtra("mode", ((RadioGroup) findViewById(R.id.modeSelect)).getCheckedRadioButtonId());
startActivity(i);
}
};
int index = 0;
for (int quiz: Quizzes.quizzes) {
Button b = (Button) findViewById(quiz);
b.setOnClickListener(listener);
b.setTag(Integer.valueOf(index++)); // <------
}
}
2。忘记ImageViews的GridView。相反,子类自己查看和绘制井字游戏板,让您的主板响应点击。在棋盘计算出点击的象限后,它可以参考其自己的游戏内部模型来决定如何进行,并且当它重新绘制时,它可以再次使用该模型重绘。我点击了什么图片?“逻辑更接近于tic-tac-toe的逻辑。如果您以前从未这样做过,请从Snake SDK示例中学习TileView。
答案 1 :(得分:0)
让我们尝试一下,因为gridview中的每个项目都是ImageView
@Override
public ImageView getItem(int position) {
return mThumbIds[position];
}
并使用该方法获得项目的正确位置
gridView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
parent.getItemAtPosition(position).setImageResource(R.drawable.x);
}
});