1、ImageView显示图片
Bitmap bitmap = BitmapFactory.decodeFile(imgPath +"/123.jpg");
iv.setImageBitmap(bitmap);
2、SurfaceView绘制图片
SurfaceView sv = findViewById(R.id.sv);
sv.getHolder().addCallback(new SurfaceHolder.Callback()
{
@Override
public void surfaceCreated(@NonNull SurfaceHolder holder)
{
if (holder == null)
return;
Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setStyle(Paint.Style.STROKE);
Bitmap bitmap = BitmapFactory.decodeFile(imgPath + "/123.jpg");
Canvas canvas = holder.lockCanvas();
canvas.drawBitmap(bitmap,0,0,paint);
holder.unlockCanvasAndPost(canvas);
}
@Override
public void surfaceChanged(@NonNull SurfaceHolder holder, int format, int width, int height)
{
}
@Override
public void surfaceDestroyed(@NonNull SurfaceHolder holder)
{
}
});
3、自定义View绘制图片
public class ImgView extends View
{
private final Paint paint;
private final Bitmap bitmap;
public ImgView(Context context)
{
super(context);
paint = new Paint();
paint.setAntiAlias(true);
paint.setStyle(Paint.Style.STROKE);
final String imgPath = context.getExternalFilesDir(null).toString()+"/Img";
bitmap = BitmapFactory.decodeFile(imgPath + "/123.jpg");
}
@Override
protected void onDraw(Canvas canvas)
{
super.onDraw(canvas);
if (bitmap != null)
canvas.drawBitmap(bitmap,0,0,paint);
}
}
