简单的颜色选择器

Question

我正在尝试展示一个简单的颜色选择器,以便用户可以选择几个文本的颜色......但到目前为止我找到的每个颜色选择器似乎都太复杂了.如果至少我对如何有所了解,我不介意自己编码.

有人能为我提供一些简单的颜色选择器的代码吗？或者指出我进一步研究如何编码的方向？

我正在努力实现这样的目标:

Answer 1

如果遇到其他人,这里是检索值的代码:

seekBarFont.setMax(256*7-1);
seekBarFont.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
        @Override
        public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
            if(fromUser){
                int r = 0;
                int g = 0;
                int b = 0;

                if(progress < 256){
                    b = progress;
                } else if(progress < 256*2) {
                    g = progress%256;
                    b = 256 - progress%256;
                } else if(progress < 256*3) {
                    g = 255;
                    b = progress%256;
                } else if(progress < 256*4) {
                    r = progress%256;
                    g = 256 - progress%256;
                    b = 256 - progress%256;
                } else if(progress < 256*5) {
                    r = 255;
                    g = 0;
                    b = progress%256;
                } else if(progress < 256*6) {
                    r = 255;
                    g = progress%256;
                    b = 256 - progress%256;
                } else if(progress < 256*7) {
                    r = 255;
                    g = 255;
                    b = progress%256;
                }

                seekBarFont.setBackgroundColor(Color.argb(255, r, g, b));
            }
        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {

        }

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {

        }
    });

Answer 2

尝试这个：

在 xml 中使用：

<SeekBar
   android:id="@+id/seekbar_font"
   android:layout_width="300dip"
   android:layout_height="wrap_content"
   android:layout_margin="10px"
   android:max="100"
   android:progress="50"></SeekBar>

活动中：

LinearGradient test = new LinearGradient(0.f, 0.f, 300.f, 0.0f,
              new int[] { 0xFF000000, 0xFF0000FF, 0xFF00FF00, 0xFF00FFFF,
              0xFFFF0000, 0xFFFF00FF, 0xFFFFFF00, 0xFFFFFFFF}, 
              null, TileMode.CLAMP);
        ShapeDrawable shape = new ShapeDrawable(new RectShape());
        shape.getPaint().setShader(test);

        SeekBar seekBarFont = (SeekBar)findViewById(R.id.seekbar_font);
        seekBarFont.setProgressDrawable( (Drawable)shape );