主页固定显示

iconloader/src/androidTest/java/com/uiui/iconloader/ExampleInstrumentedTest.java

@@ -0,0 +1,27 @@
+package com.uiui.iconloader;
+
+import android.content.Context;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+
+        assertEquals("com.ttstd.iconloader.test", appContext.getPackageName());
+    }
+}

iconloader/src/main/AndroidManifest.xml

@@ -0,0 +1 @@
+<manifest package="com.uiui.iconloader" />

iconloader/src/main/java/com/uiui/iconloader/CacheKeyGenerator.java

@@ -0,0 +1,16 @@
+package com.uiui.iconloader;
+
+import android.content.ComponentName;
+import android.content.Intent;
+
+public class CacheKeyGenerator {
+    // 生成ComponentName的标准字符串格式（包名/类名）
+    public static String generateKey(ComponentName componentName) {
+        return componentName.flattenToShortString(); // 如：com.example.app/.MainActivity
+    }
+
+    // 从Intent中提取ComponentName作为键
+    public static String generateKey(Intent intent) {
+        return generateKey(intent.getComponent());
+    }
+}

iconloader/src/main/java/com/uiui/iconloader/IconCacheManager.java

@@ -0,0 +1,79 @@
+package com.uiui.iconloader;
+
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.util.Log;
+
+import androidx.collection.LruCache;
+
+import com.jakewharton.disklrucache.DiskLruCache;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+
+public class IconCacheManager {
+    private static final String TAG = "IconCacheManager";
+    private LruCache<String, Drawable> mMemoryCache;
+    private DiskLruCache mDiskCache;
+
+    public IconCacheManager(Context context) {
+        // 内存缓存（最大8MB）
+        int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
+        int cacheSize = maxMemory / 8;
+        mMemoryCache = new LruCache<String, Drawable>(cacheSize) {
+            @Override
+            protected int sizeOf(String key, Drawable icon) {
+                if (icon instanceof BitmapDrawable) {
+                    return ((BitmapDrawable) icon).getBitmap().getByteCount() / 1024;
+                }
+                return 1; // 非Bitmap对象按1KB计算
+            }
+        };
+
+        // 磁盘缓存（50MB）
+        File cacheDir = new File(context.getCacheDir(), "icon_cache");
+        try {
+            mDiskCache = DiskLruCache.open(cacheDir, 1, 1, 50 * 1024 * 1024);
+        } catch (Exception e) {
+            Log.e(TAG, "IconCacheManager: " + e.getMessage());
+        }
+    }
+
+    public Drawable getFromMemory(String key) {
+        return mMemoryCache.get(key);
+    }
+
+    public Drawable getFromDisk(String key) {
+        try {
+            DiskLruCache.Snapshot snapshot = mDiskCache.get(key);
+            if (snapshot != null) {
+                InputStream in = snapshot.getInputStream(0);
+                return Drawable.createFromStream(in, null);
+            }
+        } catch (IOException e) {
+            Log.e("IconCache", "Disk read error", e);
+        }
+        return null;
+    }
+
+    public void putToMemory(String key, Drawable icon) {
+        mMemoryCache.put(key, icon);
+    }
+
+
+    public void putToDisk(String key, Drawable icon) {
+        try {
+            DiskLruCache.Editor editor = mDiskCache.edit(key);
+            if (icon instanceof BitmapDrawable) {
+                Bitmap bitmap = ((BitmapDrawable) icon).getBitmap();
+                bitmap.compress(Bitmap.CompressFormat.PNG, 100, editor.newOutputStream(0));
+                editor.commit();
+            }
+        } catch (IOException e) {
+            Log.e("IconCache", "Disk write error", e);
+        }
+    }
+}

iconloader/src/main/java/com/uiui/iconloader/IconLoader.java

@@ -0,0 +1,97 @@
+package com.uiui.iconloader;
+
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.pm.ActivityInfo;
+import android.content.pm.PackageManager;
+import android.content.res.Configuration;
+import android.graphics.Bitmap;
+import android.graphics.Color;
+import android.graphics.PorterDuff;
+import android.graphics.drawable.AdaptiveIconDrawable;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+import android.os.Build;
+
+import androidx.loader.content.AsyncTaskLoader;
+
+public class IconLoader extends AsyncTaskLoader<Drawable> {
+    private final ComponentName mComponentName; // 关键：使用ComponentName标识组件
+    private final IconCacheManager mCache;
+
+    public IconLoader(Context context, ComponentName componentName, IconCacheManager cache) {
+        super(context);
+        mComponentName = componentName;
+        mCache = cache;
+    }
+
+    @Override
+    protected void onStartLoading() {
+        String key = CacheKeyGenerator.generateKey(mComponentName);
+        // 1. 检查内存缓存
+        Drawable cachedIcon = mCache.getFromMemory(key);
+        if (cachedIcon != null) {
+            deliverResult(cachedIcon); // 直接返回缓存
+            return;
+        }
+        forceLoad(); // 触发后台加载
+    }
+
+    @Override
+    public Drawable loadInBackground() {
+        String key = CacheKeyGenerator.generateKey(mComponentName);
+
+        // 1. 检查内存缓存
+        Drawable cachedIcon = mCache.getFromMemory(key);
+        if (cachedIcon != null) return cachedIcon;
+
+        // 2. 检查磁盘缓存
+        Drawable diskCached = mCache.getFromDisk(key);
+        if (diskCached != null) {
+            mCache.putToMemory(key, diskCached);
+            return diskCached;
+        }
+
+        // 3. 从PackageManager加载组件专属图标
+        try {
+            PackageManager pm = getContext().getPackageManager();
+            ActivityInfo info = pm.getActivityInfo(mComponentName, 0); // 获取ActivityInfo
+            Drawable rawIcon = info.loadIcon(pm); // 加载该组件的图标
+
+            // 4. 图标处理（压缩/主题适配）
+            Drawable processedIcon = processIcon(rawIcon);
+
+            // 5. 更新缓存
+            mCache.putToMemory(key, processedIcon);
+            mCache.putToDisk(key, processedIcon);
+            return processedIcon;
+        } catch (PackageManager.NameNotFoundException e) {
+            return null;
+        }
+    }
+
+    private Drawable processIcon(Drawable icon) {
+        // 自适应图标处理（Android 8.0+）
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
+                && icon instanceof AdaptiveIconDrawable) {
+            AdaptiveIconDrawable adaptiveIcon = (AdaptiveIconDrawable) icon;
+            int targetColor = isDarkMode() ? Color.WHITE : Color.BLACK;
+            adaptiveIcon.setColorFilter(targetColor, PorterDuff.Mode.SRC_ATOP); // 根据主题切换单色模式
+        }
+
+        // 图标尺寸压缩（避免内存溢出）
+        if (icon instanceof BitmapDrawable) {
+            Bitmap bitmap = ((BitmapDrawable) icon).getBitmap();
+            int scaledWidth = bitmap.getWidth() / 2;
+            int scaledHeight = bitmap.getHeight() / 2;
+            Bitmap scaledBitmap = Bitmap.createScaledBitmap(bitmap, scaledWidth, scaledHeight, true);
+            return new BitmapDrawable(getContext().getResources(), scaledBitmap);
+        }
+        return icon;
+    }
+
+    private boolean isDarkMode() {
+        return (getContext().getResources().getConfiguration().uiMode
+                & Configuration.UI_MODE_NIGHT_MASK) == Configuration.UI_MODE_NIGHT_YES;
+    }
+}

iconloader/src/test/java/com/uiui/iconloader/ExampleUnitTest.java

@@ -0,0 +1,17 @@
+package com.uiui.iconloader;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() {
+        assertEquals(4, 2 + 2);
+    }
+}