public class AndroidTest extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
MyView mv = new MyView(this); setContentView(mv); }
public class MyView extends View { MyView(Context context) { super(context); }
Paint paint = new Paint();
canvas.drawRect(new Rect(cellLeft, cellTop, cellLeft+ screenWidth / 16, cellTop+ screenWidth / 16), paint);}
你想要画什么呢?
生成bitmap后setimgagebitmap(bitmap)
看api,看demo。
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MyView mv = new MyView(this);
setContentView(mv);
}
public class MyView extends View { MyView(Context context) {
super(context);
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
// 首先定义一个paint
Paint paint = new Paint(); // 绘制矩形区域-实心矩形
// 设置颜色
paint.setColor(Color.BLUE);
// 设置样式-填充
paint.setStyle(Style.FILL);
// 绘制一个矩形
canvas.drawRect(new Rect(0, 0, getWidth(), getHeight()), paint); // 绘空心矩形
// 设置颜色
paint.setColor(Color.RED);
// 设置样式-空心矩形
paint.setStyle(Style.STROKE);
// 绘制一个矩形
canvas.drawRect(new Rect(10, 10, 100, 30), paint); // 绘文字
// 设置颜色
paint.setColor(Color.GREEN);
// 绘文字
canvas.drawText("Hello", 10, 50, paint); // 绘图
// 从资源文件中生成位图
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icon);
// 绘图
canvas.drawBitmap(bitmap, 10, 60, paint);
}
}
}