【UI】Palette的使用API

1、Palette的使用：

引入v7里面的一个单独项目Palette，android.support.v7.graphics.Palette;

Palette：可以在一张图片里面分析出一些色彩特性：主色调、鲜艳的颜色、柔和颜色等等……

public class MainActivity extends AppCompatActivity {    private ImageView iv;    private TextView tv_title;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        iv = (ImageView)findViewById(R.id.iv);        tv_title = (TextView)findViewById(R.id.tv_title);        final TextView tv1 = (TextView)findViewById(R.id.tv1);        final TextView tv2 = (TextView)findViewById(R.id.tv2);        final TextView tv3 = (TextView)findViewById(R.id.tv3);        final TextView tv4 = (TextView)findViewById(R.id.tv4);        final TextView tv5 = (TextView)findViewById(R.id.tv5);        final TextView tv6 = (TextView)findViewById(R.id.tv6);        BitmapDrawable drawable = (BitmapDrawable) iv.getDrawable();        Bitmap bitmap = drawable.getBitmap();        //得到bitmap里面的的一些色彩信息---通过Palette类分析出来的//      Palette palette = Palette.generate(bitmap);        //异步任务---可能分析的图片会比较大或者颜色分布比较复杂，会耗时比较久，防止卡死主线程。        Palette.from(bitmap).generate(new PaletteAsyncListener() {            @Override            public void onGenerated(Palette palette) {                //暗、柔和的颜色                int darkMutedColor = palette.getDarkMutedColor(Color.BLUE);//如果分析不出来，则返回默认颜色                //暗、柔和                int lightMutedColor = palette.getLightMutedColor(Color.BLUE);                //暗、鲜艳                int darkVibrantColor = palette.getDarkVibrantColor(Color.BLUE);                //亮、鲜艳                int lightVibrantColor = palette.getLightVibrantColor(Color.BLUE);                //柔和                int mutedColor = palette.getMutedColor(Color.BLUE);                //柔和                int vibrantColor = palette.getVibrantColor(Color.BLUE);                //获取某种特性颜色的样品//              Swatch lightVibrantSwatch = palette.getLightVibrantSwatch();                Swatch lightVibrantSwatch = palette.getVibrantSwatch();                //谷歌推荐的：图片的整体的颜色rgb的混合值---主色调                int rgb = lightVibrantSwatch.getRgb();                //谷歌推荐：图片中间的文字颜色                int bodyTextColor = lightVibrantSwatch.getBodyTextColor();                //谷歌推荐：作为标题的颜色（有一定的和图片的对比度的颜色值）                int titleTextColor = lightVibrantSwatch.getTitleTextColor();                //颜色向量                float[] hsl = lightVibrantSwatch.getHsl();                //分析该颜色在图片中所占的像素多少值                int population = lightVibrantSwatch.getPopulation();                tv_title.setBackgroundColor(getTranslucentColor(0.6f,rgb));                tv_title.setTextColor(titleTextColor);                tv1.setBackgroundColor(darkMutedColor);                tv1.setText("darkMutedColor");                tv2.setBackgroundColor(lightMutedColor);                tv2.setText("lightMutedColor");                tv3.setBackgroundColor(darkVibrantColor);                tv3.setText("darkVibrantColor");                tv4.setBackgroundColor(lightVibrantColor);                tv4.setText("lightVibrantColor");                tv5.setBackgroundColor(mutedColor);                tv5.setText("mutedColor");                tv6.setBackgroundColor(vibrantColor);                tv6.setText("vibrantColor");            }        });    }    /**     * 1101 0111 1000 1011     *           1111 1111     *           1000 1011     */    protected int getTranslucentColor(float percent, int rgb) {        // 10101011110001111        int blue = Color.blue(rgb);        int green = Color.green(rgb);        int red = Color.red(rgb);        int alpha = Color.alpha(rgb);//      int blue = rgb & 0xff;//      int green = rgb>>8 & 0xff;//      int red = rgb>>16 & 0xff;//      int alpha = rgb>>>24;        alpha = Math.round(alpha*percent);        Toast.makeText(this, "alpha:"+alpha+",red:"+red+",green:"+green, 1).show();        return Color.argb(alpha, red, green, blue);    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        // Handle action bar item clicks here. The action bar will        // automatically handle clicks on the Home/Up button, so long        // as you specify a parent activity in AndroidManifest.xml.        int id = item.getItemId();        if (id == R.id.action_settings) {            return true;        }        return super.onOptionsItemSelected(item);    }}