1.页面总体使用线性布局(LinearLayout)
2.将Toolbar(顶部菜单栏)拖入design模式下的设计界面中
3.颜色选择器需要在build.gradle中手动的添加
compile 'com.android.support:palette-v7:28.0.0'
4.代码
public class MainActivity extends AppCompatActivity { Toolbar toolbar; //天坑:Toolbar有两个版本,导包一定要正确 TextView textView1; ImageView imageView; int picture[]={R.mipmap.img1,R.mipmap.img2,R.mipmap.img3,R.mipmap.img4,R.mipmap.img5}; int i=0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); toolbar=findViewById(R.id.toolbar); textView1=findViewById(R.id.textView); imageView=findViewById(R.id.imageView); imageView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { i++; i=i%picture.length; imageView.setImageResource(picture[i]); Bitmap bitmap=BitmapFactory.decodeResource(getResources(),picture[i]); Palette.generateAsync(bitmap, new Palette.PaletteAsyncListener() { @Override public void onGenerated(@Nullable Palette palette) { Palette.Swatch swatch=palette.getVibrantSwatch(); if(swatch!=null){ toolbar.setBackgroundColor(swatch.getRgb()); textView1.setTextColor(swatch.getTitleTextColor()); } } }); } }); } }