un tableau d'images

package my.android; import android.app.Activity; import android.os.Bundle; import android.widget.TableLayout; import android.widget.TableRow; public class Test2Activity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); TableRow.LayoutParams params = new TableRow.LayoutParams(100, 100); TableLayout tl=new TableLayout(this); for(int i=0;i<7;i++) { TableRow tr =new TableRow(this); for(int j=0;j<6;j++) { Image image = new Image(this); image.setLayoutParams(params); tr.addView(image, j); } tl.addView(tr, i); } setContentView(tl); } }

package my.android; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.view.View; public class Image extends View{ private Bitmap image; public Image(Context context) { super(context); image = BitmapFactory.decodeResource(context.getResources(), R.drawable.cases); } @Override protected void onDraw(Canvas canvas) { Paint paint = new Paint(); paint.setColor(Color.WHITE); paint.setAntiAlias(true); canvas.drawBitmap(image, 0, canvas.getHeight() / 8, paint); } }

1. Pourquoi ne pas utiliser d'ImageView ?

Code:

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    ImageView[] cells;
 
    public int getCellIndex(int x, int y)
    {
        return NUM_CELLS * y + x;
    }
 
    public void onCreate(...)
    {
        TableLayout table = (TableLayout) findViewById(R.id.my_table);
 
        this.cells = new ImageView[NUM_ROWS*NUM_CELLS];
        for (int y = 0; (y < NUM_ROWS); ++y) {
            TableRow tr = new TableRow(this);
            for (int x = 0; (x < NUM_CELLS); ++x) {
               int idx = getCellIndex(x,y);
               this.cells[idx] = new ImageView(this);
               this.cells[idx].setDrawableResource(R.drawable.empty_cell);
               tr.addView(this.cells[idx]);
            }
            table.addView(tr);
        }
    }
}
 
public void setCellColor(int x, int y, int v)
{
    int idx = getCellIdx(x,y);
    int resid;
    switch (v) {
      case RED: resid = R.drawable.red_cell; break;
      case YELLOW: resid = R.drawable.yellow_cell; break;
      default: resid = R.drawable.empty_cell; break;
    }
    this.cells[idx].setDrawableResource(resid);
}

2. Pourquoi ne pas construire le layout complet dans le XML, et juste référence les cases par leur ID ?

Code:

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public void setCellColor(int x, int y, int v)
{
    int id = getCellId(x,y);
    int resid;
    switch (v) {
      case RED: resid = R.drawable.red_cell; break;
      case YELLOW: resid = R.drawable.yellow_cell; break;
      default: resid = R.drawable.empty_cell; break;
    }
    ((ImageView)findViewById(id)).setDrawableResource(resid);
}
public int getCellId(int x, int y)
{
    StringBuilder cellIdName = new StringBuilder(16);
    cellIdName.append("cell_").append(x).append('_').append(y);
    return R.id.class.getDeclaredField(cellIdName.toString()).getInt(null);
}