#update 添加灰色效果滤镜

app/src/main/java/com/mirkowu/mvm/ui/mvvm/MVVMActivity.kt

@@ -3,12 +3,16 @@ package com.mirkowu.mvm.ui.mvvm
 import android.content.Context
 import android.content.Intent
 import android.graphics.Color
+import android.graphics.ColorMatrix
+import android.graphics.ColorMatrixColorFilter
+import android.graphics.Paint
 import android.view.View
 import android.widget.Toast
 import androidx.recyclerview.widget.LinearLayoutManager
 import com.mirkowu.lib_base.util.bindingView
 import com.mirkowu.lib_base.widget.RefreshHelper
 import com.mirkowu.lib_network.state.observeRequest
+import com.mirkowu.lib_util.ColorFilterUtils
 import com.mirkowu.lib_util.LogUtil
 import com.mirkowu.lib_widget.adapter.BaseRVAdapter
 import com.mirkowu.lib_widget.stateview.LoadingDot
@@ -31,6 +35,7 @@ class MVVMActivity : BaseActivity<MVVMMediator?>(), RefreshHelper.OnRefreshListe
         setContentView(binding.root)
     }
 
+    var isGrayMode=false
     override fun initialize() {
         refreshHelper = RefreshHelper(binding.mRefresh, binding.mRecyclerView, this)
         imageAdapter = ImageAdapter()
@@ -48,6 +53,12 @@ class MVVMActivity : BaseActivity<MVVMMediator?>(), RefreshHelper.OnRefreshListe
                 "TAG",
                 "onItemChildClick: $position"
             )
+            isGrayMode=!isGrayMode
+            if (isGrayMode){
+                ColorFilterUtils.setGrayFilter(activity)
+            }else{
+                ColorFilterUtils.removeFilter(activity)
+            }
         }
         imageAdapter.setOnItemChildLongClickListener { view, item, position ->
             LogUtil.i("TAG", "onItemChildLongClick: $position")

lib_util/src/main/java/com/mirkowu/lib_util/ColorFilterUtils.java

@@ -0,0 +1,46 @@
+package com.mirkowu.lib_util;
+
+import android.app.Activity;
+import android.graphics.ColorMatrix;
+import android.graphics.ColorMatrixColorFilter;
+import android.graphics.Paint;
+import android.view.View;
+
+public class ColorFilterUtils {
+
+    /**
+     * 灰色滤镜效果（eg.悼念日）
+     *
+     * @param view
+     */
+    public static void setGrayFilter(View view) {
+        Paint paint = new Paint();
+        ColorMatrix cm = new ColorMatrix();
+        cm.setSaturation(0);//????
+        paint.setColorFilter(new ColorMatrixColorFilter(cm));
+        view.setLayerType(View.LAYER_TYPE_HARDWARE, paint);
+    }
+
+    /**
+     * 移除滤镜
+     *
+     * @param view
+     */
+    public static void removeFilter(View view) {
+        Paint paint = new Paint();
+//        ColorMatrix cm = new ColorMatrix();
+//        cm.setSaturation(0);//????
+//        paint.setColorFilter(new ColorMatrixColorFilter(cm));
+        view.setLayerType(View.LAYER_TYPE_HARDWARE, paint);
+    }
+
+    public static void setGrayFilter(Activity activity) {
+        setGrayFilter(activity.getWindow().getDecorView());
+    }
+
+    public static void removeFilter(Activity activity) {
+        removeFilter(activity.getWindow().getDecorView());
+    }
+
+
+}