Question

我成功更改了放置在“图像视图”列表中的位图图像的颜色，但是问题是它完全改变了，而不是我选择的图像，我试图在我选择的图像视图中获得位图。但仍然没有。我的想法是使用包含图像的哈希图，并且我在每个元素上捕获了On Click事件，所有功能都起作用，但它更改了所有图像的颜色，而不仅仅是我单击的图像。

我设置位图的功能

private void setUp() {
    bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icons8_bus_36_border);
    tempBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
    tempCanvas = new Canvas(tempBitmap);
    tempCanvas.drawBitmap(bitmap, 0, 0, mPaint);
    if (bitmap == null) {
        Log.d(TAG, "setUp: null rồi");
    } else {
        Log.d(TAG, "setUp: ko null");
    }
}

将位图放入图像视图

 private void sequentially() {
    setUp();
    imageList = new HashMap<>();
    chooseColor = Color.parseColor("#1A86C8");
    seat.setGravity(Gravity.CENTER);
    LinearLayout row = new LinearLayout(getActivity());
    row.setOrientation(LinearLayout.HORIZONTAL);
    LinearLayout.LayoutParams firstImg = new LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.WRAP_CONTENT,
            LinearLayout.LayoutParams.WRAP_CONTENT
    );
    firstImg.setMargins(10, 0, 0, 0);

    LinearLayout.LayoutParams forRow = new LinearLayout.LayoutParams(
            LinearLayout.LayoutParams.MATCH_PARENT,
            LinearLayout.LayoutParams.WRAP_CONTENT
    );
    forRow.setMargins(0, 0, 0, 15);
    for (int j = 0; j < 2; j++) {
        row = new LinearLayout(getActivity());
        row.setLayoutParams(forRow);
        seat.addView(row);
        for (int i = 0; i < 3; i++) {
            countForImage++;
            imageView = new ImageView(getActivity());
            imageList.put(countForImage, imageView);
            Log.d(TAG, "sequentially: number" + countForImage);
            imageView.setLayoutParams(firstImg);
            tempCanvas.drawBitmap(bitmap, 0, 0, mPaint);
            imageView.setImageDrawable(new BitmapDrawable(getResources(), tempBitmap));
            row.addView(imageView);
            if (i == 1 && j == 0) {
                imageView.setVisibility(View.INVISIBLE);
            }
        }
    }
}

在上面的代码中，我还获得了图像列表，并开始为其捕获事件

 public void loopSeat(Map<Integer, ImageView> map) {
    Log.d(TAG, "loopSeat: ");
    Iterator iterator = map.entrySet().iterator();
    while (iterator.hasNext()) {
        final Map.Entry pair = (Map.Entry) iterator.next();
        final ImageView imageView = (ImageView) pair.getValue();
        imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Log.d(TAG, "onClick at number= :" + pair.getKey());
                setColor(imageView);
            }
        });
        Log.d(TAG, "loopSeat: key= " + pair.getKey());
    }
}

最后一步是更改我选择的图像的颜色

 public void setColor(ImageView imageView) {
    // TODO: 2/18/2019 this function only change all image color,need to fix 
    Log.d(TAG, "setColor: da vao");
    mPaint = new Paint(chooseColor);
    ColorFilter filter = new LightingColorFilter(chooseColor, 1);
    mPaint.setColorFilter(filter);
    Bitmap bm=((BitmapDrawable)imageView.getDrawable()).getBitmap();
    tempCanvas.drawBitmap(bm, 0, 0, mPaint);
    imageView.setImageDrawable(new BitmapDrawable(getResources(), bm));
}

Answer 1

因为ImageView的Bitmap实例相同。您需要为每个ImageView复制到新的位图： https://developer.android.com/reference/android/graphics/Bitmap.html#copy(android.graphics.Bitmap.Config,%20boolean)

尽管我建议使用ImageView的tint属性： How to set tint for an image view programmatically in android?

Answer 2

   public void setColor(ImageView imageView) {
    // TODO: 2/18/2019 this function only change all image color,need to fix 
    Log.d(TAG, "setColor: da vao");
    mPaint = new Paint(chooseColor);
    ColorFilter filter = new LightingColorFilter(chooseColor, 1);
    mPaint.setColorFilter(filter);
    //end of set color

   //start to creat a new bitmap
    Bitmap bm = bitmap.copy(Bitmap.Config.ARGB_8888, false);
    choosBitmap = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(), Bitmap.Config.ARGB_8888);
    tempCanvas.drawBitmap(choosBitmap, 0, 0, mPaint);
    imageView.setImageDrawable(new BitmapDrawable(getResources(), choosBitmap));
}

我根据建议更改了代码，但是现在当我选择图像时它不再更改蓝色而已。@ Benoit

如何在onClick事件中更改哈希图中元素的颜色，而又不影响其他元素

2 个答案: