Question

我正在使用6个项目（2 * 3）创建网格视图。

我正在实现此功能以动态更改设置。

因为我正在使用带有文本视图的网格视图。

my code is:

public class MyGridAdaptor extends BaseAdapter
{

    String[] keyPad = { "1", "2", "3", "4", "5", "6" };
    String[] functionName = {  "Wi-Fi", "Bluetooth", "GPS", "Brightness",   "Wi-Fi Tethering", "Mobile data", };
    String[][] functionStatus = { { "OFF", "ON" }, { "OFF", "ON" }, { "OFF", "ON" }, { "OFF", "ON" }, { "OFF", "ON" }, { "OFF", "ON" } };

    LayoutInflater inflater;
    Context mContext;
    TextView keyNumber, fName, fStatus;
    RelativeLayout gridItem;
    int counter = 0;

    public MyGridAdaptor(Context applicationContext)
    {
        this.mContext = applicationContext;
        inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent)
    {
        View view = convertView;
        final int pos = position;

        if (view == null)
        {
            view = inflater.inflate(R.layout.grid_item, null);

            DisplayMetrics metrics = new DisplayMetrics();
            metrics = mContext.getResources().getDisplayMetrics();
            int height = metrics.heightPixels;
            int heightAdj = 85;
            view.setMinimumHeight((height - heightAdj) / 2);

            keyNumber = (TextView) view.findViewById(R.id.tvNo);
            fName = (TextView) view.findViewById(R.id.tvName);
            fStatus = (TextView) view.findViewById(R.id.tvStatus);
            gridItem = (RelativeLayout) view.findViewById(R.id.gridItem);

        }
        else
        {
            view.getTag();
        }
        keyNumber.setText(keyPad[position]);
        fName.setText(functionName[position]);
        fStatus.setText(functionStatus[position][0]);

        gridItem.setOnClickListener(new OnClickListener()
        {

            public void onClick(View v)
            {
                counter++;

                Toast.makeText(mContext, functionName[pos]+" "+pos+" "+(counter%2)+" "+functionStatus[pos][counter%2], Toast.LENGTH_SHORT).show();
                fStatus.setText(functionStatus[pos][counter%2]);

                notifyDataSetChanged();
            }
        });
        return view;
    }

    @Override
    public int getCount()
    {
        // TODO Auto-generated method stub
        return keyPad.length;
    }

    @Override
    public Object getItem(int position)
    {
        // TODO Auto-generated method stub
        return keyPad[position];
    }

    @Override
    public long getItemId(int position)
    {
        // TODO Auto-generated method stub
        return 0;
    }

}

我在 Toast 获得了正确的值，但 Textview 中的值没有变化。

Answer 1

使用以下代码：

     gridItem.setTag(position); // Added by Sagar Zala
     gridItem.setOnClickListener(new OnClickListener()
        {
            public void onClick(View v)
            {
                int pos=(Integer)v.getTag(); // Added by Sagar Zala
                counter++;

                Toast.makeText(mContext, functionName[pos]+" "+pos+" "+(counter%2)+" "+functionStatus[pos][counter%2], Toast.LENGTH_SHORT).show();
                fStatus.setText(functionStatus[pos][counter%2]);

                notifyDataSetChanged();
            }
        });

Answer 2

试试这个，

public class MainActivity extends Activity {
    Rectangle rectangle;

    @Override
    protected void onCreate(Bundle bundle) {
        super.onCreate(bundle);
        rectangle = new Rectangle(this);
        setContentView(rectangle);

    }

}

class Rectangle extends View {
    Paint paint;

    Rectangle(Context context) {
        super(context);
        paint = new Paint();
    }
@Override
public boolean onTouchEvent(MotionEvent event) {
    new Larger_Rectangle(getContext());

    return true;
}
    @Override
    public void onDraw(Canvas canvas) {
        paint.setColor(Color.RED);
        canvas.drawRect(10, 30, 50, 70, paint);
    }

}

 class Larger_Rectangle extends View {
    Paint paint;

    Larger_Rectangle(Context context) {
        super(context);
        paint = new Paint();
    }

    @Override
    public void onDraw(Canvas canvas) {
        paint.setColor(Color.BLUE);
        canvas.drawRect(60,100,120,150,paint);
    }

}

Answer 3

你为什么这样做？将onitemselected的侦听器设置为gridview，并在项目单击时，将单击特定网格项的索引。使用索引调用getChildAtIndex（网格选择索引）。这将返回相对布局并调用relativelayout.getChildAtIndex（3）。这是你的textview。更新文本并享受

Answer 4

请尝试以下代码：

gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {

/*
                ImageView checkImage= (ImageView) view.findViewById(R.id.image);
                //checkImage.setTag(R.drawable.checkimg);

                //checkImage.setImageResource(R.drawable.checkimg);
                    checkImage.setBackgroundDrawable(new PaintDrawable(Color.BLUE));
                PaintDrawable drawable = (PaintDrawable) checkImage.getBackground();

                int color = drawable.getPaint().getColor();
                int drawableId = (Integer) checkImage.getTag();
                Log.d("getTag",String.valueOf(color));
  */

                TextView text = (TextView) view.findViewById(R.id.text);

                text.setText("Selected");
                //ImageView imageView = (ImageView) view;
                //imageView.setImageResource(R.drawable.checkimg);
            }
        });`

在GridView中动态更改TextView

4 个答案: