Android學習之plugin插件apk中Resource、AssetManager資源獲取

demo下載​

友情跳轉：基於DexClassLoader類裝載器開發plugin插件

/**
 * 根據plugin插件路徑創建插件AssetManager對象
 *
 * @param apkPath
 * @return
 */
private AssetManager createPluginAssetManager(String apkPath) {
    try {
        AssetManager assetManager = AssetManager.class.newInstance();
        try {
            AssetManager.class.getDeclaredMethod("addAssetPath", String.class).invoke(
                    assetManager, apkPath);
        } catch (Throwable th) {
            System.out.println("debug:createAssetManager :"+th.getMessage());
            th.printStackTrace();
        }
        return assetManager;
    } catch (Throwable th) {
        System.out.println("debug:createAssetManager :"+th.getMessage());
        th.printStackTrace();
    }
    return null;
}

/**
 * 使用反射的方式，使用Plugin的Resource對象，替換Context的mResources對象
 *
 * @param context
 * @param resources
 */
public void replaceContextResources(Context context, Resources resources){
    try {
        Field field = context.getClass().getDeclaredField("mResources");
        field.setAccessible(true);
        field.set(context, resources);
        System.out.println("debug:repalceResources succ");
    } catch (Exception e) {
        System.out.println("debug:repalceResources error");
        e.printStackTrace();
    }
}

/**
 * 獲取plugin插件中的Resources資源對象
 *
 * @param context
 * @param apkPath
 * @return
 */
public Resources getPluginResource(Context context, String apkPath){
    AssetManager assetManager = createPluginAssetManager(apkPath);
    return new Resources(assetManager, context.getResources().getDisplayMetrics(), context.getResources().getConfiguration());

}

​