应用插件化实践--DroidPlugin的使用

jopen 8年前

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随着应用的体积越来越大, 插件化也逐渐受到关注, 参考. 应用插件化把模块完全解耦, 使用下载更新的方式, 扩展应用, 是平台化类应用的必然选择. 国内很多公司实现了各式各样的方法, 360的DroidPlugin是比较有意思的一个, 使用预占位的方式注册四大组件, 实现热更新, 参考, 也可以直接读源码理解实现逻辑.

Droid Plugin

Talk is cheap, show you the code! 如何把DroidPlugin用起来呢? 这是我比较关注的事情, 开源的Demo写的如此悲伤, 我来重新梳理一下, 又添加了几个功能测试. 引入DroidPlugin作为Submodule的依赖.

Github下载地址测试Apk.

使用方法, 生成测试apk, 和其他若干apk, 放入Download文件夹下.
adb命令: adb push app-debug.apk /sdcard/Download/app-debug.apk
确保Download文件夹下, 有.apk后缀名的文件.

主要
(1) 插件安装后, 可以直接启动, 不需要任何冗余操作.
(2) 宿主的权限要多于插件的权限, 否则会权限不足.
(3) 宿主和插件, 可以通过隐式Intent进行通信.

动画

1. 主页

使用TabLayout+ViewPager的架构, 包含两个页面, 一个是安装\删除页面, 另一个是启动\卸载页面. 为了测试和插件的Intent通信, 增加跳转功能和显示信息功能.

/** * 主页面, 使用TabLayout+ViewPager. * 子页面, 使用RecyclerView. * * @author wangchenlong */  public class MainActivity extends AppCompatActivity {        @Bind(R.id.main_tl_tabs) TabLayout mTlTabs; // Tabs      @Bind(R.id.main_vp_container) ViewPager mVpContainer; // ViewPager      @Bind(R.id.main_b_goto) Button mBGoto; // 跳转插件的按钮        @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_main);          ButterKnife.bind(this);            PagerAdapter adapter = new PagerAdapter(getSupportFragmentManager());          mVpContainer.setAdapter(adapter);          mTlTabs.setupWithViewPager(mVpContainer);          mBGoto.setOnClickListener(this::gotoPlugin);            Intent intent = getIntent();          if (intent != null && intent.getStringExtra(PluginConsts.MASTER_EXTRA_STRING) != null) {              String words = "say: " + intent.getStringExtra(PluginConsts.MASTER_EXTRA_STRING);              Toast.makeText(this, words, Toast.LENGTH_SHORT).show();          }      }        // 跳转控件      private void gotoPlugin(View view) {          if (isActionAvailable(view.getContext(), PluginConsts.PLUGIN_ACTION_MAIN)) {              Intent intent = new Intent(PluginConsts.PLUGIN_ACTION_MAIN);              intent.putExtra(PluginConsts.PLUGIN_EXTRA_STRING, "Hello, My Plugin!");              startActivity(intent);          } else {              Toast.makeText(view.getContext(), "跳转失败", Toast.LENGTH_SHORT).show();          }      }        // Action是否允许      public static boolean isActionAvailable(Context context, String action) {          Intent intent = new Intent(action);          return context.getPackageManager().resolveActivity(intent, 0) != null;      }  }

ViewPager适配器

/** * ViewPager的适配器 * <p> * Created by wangchenlong on 16/1/8. */  public class PagerAdapter extends FragmentPagerAdapter {        private static final String[] TITLES = {              "已安装",              "未安装"      };        public PagerAdapter(FragmentManager fm) {          super(fm);      }        @Override public Fragment getItem(int position) {          if (position == 0) {              return new StartFragment(); // 已安装页          } else {              return new StoreFragment(); // 想要安装页          }      }        @Override public int getCount() {          return TITLES.length;      }        @Override      public CharSequence getPageTitle(int position) {          return TITLES[position];      }  }

2. 加载页

显示Download文件夹下的Apk信息. 使用RecyclerView实现apk列表, 复用Adapter, 标志位(ApkOperator.TYPE_STORE)区分页面. 使用Rx异步扫描Download文件夹, 添加至列表. 接收服务连接状态, 成功则自动显示Apk.

/** * 安装Apk的页面, 使用RecyclerView. * <p> * Created by wangchenlong on 16/1/8. */  public class StoreFragment extends Fragment {        @Bind(R.id.list_rv_recycler) RecyclerView mRvRecycler;        private ApkListAdapter mStoreAdapter; // 适配器        // 服务连接      private ServiceConnection mServiceConnection = new ServiceConnection() {          @Override public void onServiceConnected(ComponentName name, IBinder service) {              loadApks();          }            @Override public void onServiceDisconnected(ComponentName name) {            }      };        @Nullable @Override      public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {          View view = inflater.inflate(R.layout.fragment_list, container, false);          ButterKnife.bind(this, view);          return view;      }        @Override public void onViewCreated(View view, Bundle savedInstanceState) {          super.onViewCreated(view, savedInstanceState);          LinearLayoutManager llm = new LinearLayoutManager(view.getContext());          llm.setOrientation(LinearLayoutManager.VERTICAL);          mRvRecycler.setLayoutManager(llm);            mStoreAdapter = new ApkListAdapter(getActivity(), ApkOperator.TYPE_STORE);          mRvRecycler.setAdapter(mStoreAdapter);            if (PluginManager.getInstance().isConnected()) {              loadApks();          } else {              PluginManager.getInstance().addServiceConnection(mServiceConnection);          }      }        // 加载Apk      private void loadApks() {          // 异步加载, 防止Apk过多, 影响速度          Observable.just(getApkFromDownload())                  .subscribeOn(Schedulers.newThread())                  .observeOn(AndroidSchedulers.mainThread())                  .subscribe(mStoreAdapter::setApkItems);      }        // 从下载文件夹获取Apk      private ArrayList<ApkItem> getApkFromDownload() {          File files = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);          PackageManager pm = getActivity().getPackageManager();          ArrayList<ApkItem> apkItems = new ArrayList<>();          for (File file : files.listFiles()) {              if (file.exists() && file.getPath().toLowerCase().endsWith(".apk")) {                  final PackageInfo info = pm.getPackageArchiveInfo(file.getPath(), 0);                  apkItems.add(new ApkItem(pm, info, file.getPath()));              }          }          return apkItems;      }        @Override      public void onDestroyView() {          super.onDestroyView();          ButterKnife.unbind(this);          PluginManager.getInstance().removeServiceConnection(mServiceConnection);      }  }

适配器, 负责列表显示, 操作交由ViewHolder进行处理.

/** * 启动的适配器 * <p> * Created by wangchenlong on 16/1/13. */  public class ApkListAdapter extends RecyclerView.Adapter<ApkItemViewHolder> {        private ArrayList<ApkItem> mApkItems;      private Activity mActivity;      private int mType; // 类型        public ApkListAdapter(Activity activity, int type) {          mActivity = activity;          mApkItems = new ArrayList<>();          mType = type;      }        public void setApkItems(ArrayList<ApkItem> apkItems) {          mApkItems = apkItems;          notifyDataSetChanged();      }        public void addApkItem(ApkItem apkItem) {          mApkItems.add(apkItem);          notifyItemInserted(mApkItems.size() + 1);      }        public void removeApkItem(ApkItem apkItem) {          mApkItems.remove(apkItem);          notifyDataSetChanged();      }        public ApkItem getApkItem(int index) {          return mApkItems.get(index);      }        public int getCount() {          return mApkItems.size();      }        @Override public ApkItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {          View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.apk_item, parent, false);          return new ApkItemViewHolder(mActivity, view, mType, this::removeApkItem);      }        @Override public void onBindViewHolder(ApkItemViewHolder holder, int position) {          holder.bindTo(mApkItems.get(position));      }        @Override public int getItemCount() {          return mApkItems.size();      }  }

注意, 在设置Item时, 需要刷新列表, 使用notifyDataSetChanged或notifyItemInserted.

ViewHolder, 控制列表点击事件, 根据页面类型, 修改调用方法.

/** * Apk的列表, 参考: R.layout.apk_item * <p> * Created by wangchenlong on 16/1/13. */  public class ApkItemViewHolder extends RecyclerView.ViewHolder {        @Bind(R.id.apk_item_iv_icon) ImageView mIvIcon; // 图标      @Bind(R.id.apk_item_tv_title) TextView mTvTitle; // 标题      @Bind(R.id.apk_item_tv_version) TextView mTvVersion; // 版本号      @Bind(R.id.apk_item_b_do) Button mBDo; // 确定按钮      @Bind(R.id.apk_item_b_undo) Button mBUndo; // 取消按钮        private ApkItem mApkItem; // Apk项      private Context mContext; // 上下文      private ApkOperator mApkOperator; // Apk操作      private int mType; // 类型        /** * 初始化ViewHolder * * @param activity Dialog绑定Activity * @param itemView 项视图 * @param type 类型, 加载或启动 * @param callback 删除Item的调用 */      public ApkItemViewHolder(Activity activity, View itemView              , int type, ApkOperator.RemoveCallback callback) {          super(itemView);          ButterKnife.bind(this, itemView);          mContext = activity.getApplicationContext();          mApkOperator = new ApkOperator(activity, callback); // Apk操作          mType = type; // 类型      }        // 绑定ViewHolder      public void bindTo(ApkItem apkItem) {          mApkItem = apkItem;            mIvIcon.setImageDrawable(apkItem.icon);          mTvTitle.setText(apkItem.title);          mTvVersion.setText(String.format("%s(%s)", apkItem.versionName, apkItem.versionCode));            // 修改文字          if (mType == ApkOperator.TYPE_STORE) {              mBUndo.setText("删除");              mBDo.setText("安装");          } else if (mType == ApkOperator.TYPE_START) {              mBUndo.setText("卸载");              mBDo.setText("启动");          }            mBUndo.setOnClickListener(this::onClickEvent);          mBDo.setOnClickListener(this::onClickEvent);      }        // 点击事件      private void onClickEvent(View view) {          if (mType == ApkOperator.TYPE_STORE) {              if (view.equals(mBUndo)) {                  mApkOperator.deleteApk(mApkItem);              } else if (view.equals(mBDo)) {                  // 安装Apk较慢需要使用异步线程                  new InstallApkTask().execute();              }          } else if (mType == ApkOperator.TYPE_START) {              if (view.equals(mBUndo)) {                  mApkOperator.uninstallApk(mApkItem);              } else if (view.equals(mBDo)) {                  mApkOperator.openApk(mApkItem);              }          }      }        // 安装Apk的线程, Rx无法使用.      private class InstallApkTask extends AsyncTask<Void, Void, String> {          @Override          protected void onPostExecute(String v) {              Toast.makeText(mContext, v, Toast.LENGTH_LONG).show();          }            @Override          protected String doInBackground(Void... params) {              return mApkOperator.installApk(mApkItem);          }      }  }

注意, 安装Apk使用异步线程(AsyncTask), 不能使用Rx.

3. 启动页

启动页面, 显示已安装的Apk, 包含启动和卸载功能. 与安装页不同, 额外增加一个接收器, 负责接收安装成功之后的广播, 用于更新列表.

/** * 启动Apk页面 * <p> * Created by wangchenlong on 16/1/13. */  public class StartFragment extends Fragment {        @Bind(R.id.list_rv_recycler) RecyclerView mRvRecycler;        private ApkListAdapter mApkListAdapter; // 适配器      private InstallApkReceiver mInstallApkReceiver; // Apk安装接收器        // 服务连接      private final ServiceConnection mServiceConnection = new ServiceConnection() {          @Override public void onServiceConnected(ComponentName name, IBinder service) {              loadApks();          }            @Override public void onServiceDisconnected(ComponentName name) {            }      };        @Nullable @Override      public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {          View view = inflater.inflate(R.layout.fragment_list, container, false);          ButterKnife.bind(this, view);          return view;      }        @Override public void onViewCreated(View view, Bundle savedInstanceState) {          super.onViewCreated(view, savedInstanceState);          LinearLayoutManager llm = new LinearLayoutManager(view.getContext());          llm.setOrientation(LinearLayoutManager.VERTICAL);          mRvRecycler.setLayoutManager(llm);            mApkListAdapter = new ApkListAdapter(getActivity(), ApkOperator.TYPE_START);          mRvRecycler.setAdapter(mApkListAdapter);            mInstallApkReceiver = new InstallApkReceiver();            mInstallApkReceiver.registerReceiver(this.getActivity());            if (PluginManager.getInstance().isConnected()) {              loadApks();          } else {              PluginManager.getInstance().addServiceConnection(mServiceConnection);          }      }        @Override      public void onDestroyView() {          super.onDestroyView();          ButterKnife.unbind(this);          mInstallApkReceiver.unregisterReceiver(this.getActivity());      }        // 加载Apk      private void loadApks() {          // 异步加载, 防止Apk过多, 影响速度          Observable.just(getApkFromInstall())                  .subscribeOn(Schedulers.newThread())                  .observeOn(AndroidSchedulers.mainThread())                  .subscribe(mApkListAdapter::setApkItems);      }        // 获取安装中获取Apk      private ArrayList<ApkItem> getApkFromInstall() {          ArrayList<ApkItem> apkItems = new ArrayList<>();          try {              final List<PackageInfo> infos = PluginManager.getInstance().getInstalledPackages(0);              if (infos == null) {                  return apkItems;              }              final PackageManager pm = getActivity().getPackageManager();              // noinspection all              for (final PackageInfo info : infos) {                  apkItems.add(new ApkItem(pm, info, info.applicationInfo.publicSourceDir));              }          } catch (RemoteException e) {              e.printStackTrace();          }            return apkItems;      }        // 安装Apk接收器      private class InstallApkReceiver extends BroadcastReceiver {            // 注册监听          public void registerReceiver(Context context) {              IntentFilter filter = new IntentFilter();              filter.addAction(PluginManager.ACTION_PACKAGE_ADDED);              filter.addAction(PluginManager.ACTION_PACKAGE_REMOVED);              filter.addDataScheme("package");              context.registerReceiver(this, filter);          }            // 关闭监听          public void unregisterReceiver(Context context) {              context.unregisterReceiver(this);          }            @Override          public void onReceive(Context context, Intent intent) {              // 监听添加和删除事件              if (PluginManager.ACTION_PACKAGE_ADDED.equals(intent.getAction())) {                  try {                      PackageManager pm = getActivity().getPackageManager();                      String pkg = intent.getData().getAuthority();                      PackageInfo info = PluginManager.getInstance().getPackageInfo(pkg, 0);                      mApkListAdapter.addApkItem(new ApkItem(pm, info, info.applicationInfo.publicSourceDir));                  } catch (Exception e) {                      e.printStackTrace();                  }              } else if (PluginManager.ACTION_PACKAGE_REMOVED.equals(intent.getAction())) {                  String pkg = intent.getData().getAuthority();                  int num = mApkListAdapter.getCount();                  ApkItem removedItem = null;                  for (int i = 0; i < num; i++) {                      ApkItem item = mApkListAdapter.getApkItem(i);                      if (TextUtils.equals(item.packageInfo.packageName, pkg)) {                          removedItem = item;                          break;                      }                  }                  if (removedItem != null) {                      mApkListAdapter.removeApkItem(removedItem);                  }              }          }      }  }

复用Adapter和ViewHolder, 代码简介之道.

4. 方法类

四大方法, 安装\删除\启动\卸载, 在删除和卸载时, 均会提示Dialog. 注意的是安装Apk, 耗时较长, 需要使用异步线程.

/** * Apk操作, 包含删除\安装\卸载\启动Apk * <p> * Created by wangchenlong on 16/1/13. */  public class ApkOperator {        public static final int TYPE_STORE = 0; // 存储Apk      public static final int TYPE_START = 1; // 启动Apk        private Activity mActivity;       // 绑定Dialog      private RemoveCallback mCallback; // 删除Item的回调        public ApkOperator(Activity activity, RemoveCallback callback) {          mActivity = activity;          mCallback = callback;      }        // 删除Apk      public void deleteApk(final ApkItem item) {          AlertDialog.Builder builder = new AlertDialog.Builder(mActivity);          builder.setTitle("警告");          builder.setMessage("你确定要删除" + item.title + "么?");          builder.setNegativeButton("删除", (dialog, which) -> {              if (new File(item.apkFile).delete()) {                  mCallback.removeItem(item);                  Toast.makeText(mActivity, "删除成功", Toast.LENGTH_SHORT).show();              } else {                  Toast.makeText(mActivity, "删除失败", Toast.LENGTH_SHORT).show();              }          });          builder.setNeutralButton("取消", null);          builder.show();      }        /** * 安装Apk, 耗时较长, 需要使用异步线程 * * @param item Apk项 * @return [0:成功, 1:已安装, -1:连接失败, -2:权限不足, -3:安装失败] */      public String installApk(final ApkItem item) {          if (!PluginManager.getInstance().isConnected()) {              return "连接失败"; // 连接失败          }            if (isApkInstall(item)) {              return "已安装"; // 已安装          }            try {              int result = PluginManager.getInstance().installPackage(item.apkFile, 0);              boolean isRequestPermission = (result == PluginManager.INSTALL_FAILED_NO_REQUESTEDPERMISSION);              if (isRequestPermission) {                  return "权限不足";              }          } catch (RemoteException e) {              e.printStackTrace();              return "安装失败";          }            return "成功";      }        // Apk是否安装      private boolean isApkInstall(ApkItem apkItem) {          PackageInfo info = null;          try {              info = PluginManager.getInstance().getPackageInfo(apkItem.packageInfo.packageName, 0);          } catch (RemoteException e) {              e.printStackTrace();          }          return info != null;      }        // 卸载Apk      public void uninstallApk(final ApkItem item) {          AlertDialog.Builder builder = new AlertDialog.Builder(mActivity);          builder.setTitle("警告");          builder.setMessage("警告,你确定要卸载" + item.title + "么?");          builder.setNegativeButton("卸载", (dialog, which) -> {              if (!PluginManager.getInstance().isConnected()) {                  Toast.makeText(mActivity, "服务未连接", Toast.LENGTH_SHORT).show();              } else {                  try {                      PluginManager.getInstance().deletePackage(item.packageInfo.packageName, 0);                      mCallback.removeItem(item);                      Toast.makeText(mActivity, "卸载完成", Toast.LENGTH_SHORT).show();                  } catch (RemoteException e) {                      e.printStackTrace();                  }              }          });          builder.setNeutralButton("取消", null);          builder.show();      }        // 打开Apk      public void openApk(final ApkItem item) {          PackageManager pm = mActivity.getPackageManager();          Intent intent = pm.getLaunchIntentForPackage(item.packageInfo.packageName);          intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);          mActivity.startActivity(intent);      }        // 删除Item回调, Adapter调用删除Item      public interface RemoveCallback {          void removeItem(ApkItem apkItem);      }  }

5. 互动Apk

为了测试DroidPlugin的一些特性, 又写了一个测试Apk.
测试插件和宿主的通信, 插件类的生命周期.

public class MainActivity extends AppCompatActivity {        private static final String TAG = "DEBUG-WCL: " + MainActivity.class.getSimpleName();        @Bind(R.id.main_b_goto_master) Button mBGotoMaster;        @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_main);          ButterKnife.bind(this);            Intent intent = getIntent();          if (intent != null && intent.getStringExtra(PluginConsts.PLUGIN_EXTRA_STRING) != null) {              String words = "say: " + intent.getStringExtra(PluginConsts.PLUGIN_EXTRA_STRING);              Toast.makeText(this, words, Toast.LENGTH_SHORT).show();          }            mBGotoMaster.setOnClickListener(this::gotoMaster);            Log.d(TAG, "onCreate"); // 测试生命周期      }        @Override protected void onDestroy() {          super.onDestroy();          Log.d(TAG, "onDestroy"); // 测试生命周期      }        // 跳转控件      private void gotoMaster(View view) {          if (isActionAvailable(view.getContext(), PluginConsts.MASTER_ACTION_MAIN)) {              Intent intent = new Intent(PluginConsts.MASTER_ACTION_MAIN);              intent.putExtra(PluginConsts.MASTER_EXTRA_STRING, "Hello, My Master!");              startActivity(intent);          } else {              Toast.makeText(view.getContext(), "跳转失败", Toast.LENGTH_SHORT).show();          }      }        // Action是否允许      public static boolean isActionAvailable(Context context, String action) {          Intent intent = new Intent(action);          return context.getPackageManager().resolveActivity(intent, 0) != null;      }  }

有时间可以再试试其他公司的插件化. One by One.

OK, that’s all! Enjoy It.

来自: http://blog.csdn.net//caroline_wendy/article/details/50527831