使用DroidPlugin实践应用的插件化
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.
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 和 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.
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@Overrideprotected 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;}@Overridepublic 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 @Overridepublic 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Apkprivate 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Apkprivate 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;}@Overridepublic 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ViewHolderpublic 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> {@Overrideprotected void onPostExecute(String v) {Toast.makeText(mContext, v, Toast.LENGTH_LONG).show();}@Overrideprotected 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 @Overridepublic 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);}}@Overridepublic void onDestroyView() {super.onDestroyView();ButterKnife.unbind(this);mInstallApkReceiver.unregisterReceiver(this.getActivity());}// 加载Apkprivate 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Apkprivate 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 allfor (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);}@Overridepublic 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Apkpublic static final int TYPE_START = 1; // 启动Apkprivate Activity mActivity; // 绑定Dialogprivate RemoveCallback mCallback; // 删除Item的回调public ApkOperator(Activity activity, RemoveCallback callback) {mActivity = activity;mCallback = callback;}// 删除Apkpublic 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Apkpublic 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Apkpublic 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Itempublic 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;@Overrideprotected 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.
原文地址: http://www.jianshu.com/p/f1217cce93ef
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