h5开发之cordova/phonegap自定义组件调用android native代码
h5混合开发有时需要调用本地的代码，就是js和原生代码交互。当然rn的封装和调用都很方便，现在用下cordova封装自定义插件plugin，cordova和phonegap的关系自行百度吧，当然cordova的安装此处也省略。 首先以 js 调用安卓的Toast为例，显示Toast提示，同时android studio中Log 一下。 具体怎么做，下面然后我们来一件一件的抽肢剖解 当然新建一个android 工程，比如这样 ---------------------------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------------------------- 然后 导入CordovaLib 在建的工程里 在Cordova 新建的项目里有这个 复制出来导入到 android studio中就好了 package plugins.com.test; import android.util.Log; import android.widget.Toast; import org.apache.cordova.CallbackContext; import org.apache.cordova.CordovaPlugin; import org.json.JSONArray; import org.json.JSONException; /** * Created by Administrator on 2018/1/18. */ public class Demo extends CordovaPlugin{ @Override public boolean execute(String action, JSONArray args, CallbackContext callbackContext) throws JSONException { if (action.equals("demoToast")) { String string = args.getString(0); this.demoToast(string, callbackContext); return true; } return false; } private void demoToast(String str, CallbackContext callbackContext) { Log.i("demo", "demo_demo"); if (str != null || str.length() > 0) { Toast.makeText(cordova.getActivity(), str, Toast.LENGTH_LONG).show(); callbackContext.success(str); } else { callbackContext.error("str 不能为空~~~!!"); } } } 写到这里需要用plugman 打包插件了 先安装plugman npm install plugman -g plugman create --name 插件名 --plugin_id 插件ID --plugin_version 插件版本号 如下图 三个步骤 把java代码复制到 src目录下 新建android 目录 var exec = require('cordova/exec'); module.exports = { demoToast: function (arg0, success, error) { exec(success, error, 'Demo', 'demoToast', [arg0]); } } plugin.xml 配置 <?xml version='1.0' encoding='utf-8'?> <plugin id="plugins.com.demo" version="1.0.0" xmlns="http://apache.org/cordova/ns/plugins/1.0" xmlns:android="http://schemas.android.com/apk/res/android"> <name>plugins-com-demo</name> <js-module name="demo" src="www/plugins-com-demo.js"> <clobbers target="Demo" /><!--Demo 为 demo的类名 写错了 alert 提示err class not found --> </js-module> <platform name="android"> <config-file target="res/xml/config.xml" parent="/*"> <feature name="Demo"> <param name="android-package" value="plugins.com.demo.Demo"/> <!--Demo 类的 完成路径 --> </feature> </config-file> <source-file src="src/android/Demo.java" target-dir="src/plugins/com/demo"/><!--Demo 在android工程里 src下的全路径 --> </platform> </plugin> 插件就完成了，需要在cordova 新建的项目中加入此插件 新建一个 项目 步骤如下 cordova create test 进入test 目录 cd test cordova platform add android 加入插件如下图 cordova plugin add c:\插件路径\plugins-com-demo 在新建的 test 项目下 www\js\index.js中加入如下代码 onDeviceReady: function() { Demo.demoToast('ok, ok!!!', function(str) { alert(str + 'succc') }, function(err) { alert(err) }); this.receivedEvent('deviceready'); }, 同理设置点击 <h1 id="demo">click me click me</h1> onDeviceReady: function() { this.receivedEvent('deviceready'); document.getElementById('demo').addEventListener('click', function(e) { demo.demoToast('ok, ok!!!', function(str) { alert(str + 'succc') }, function(err) { alert(err) }); }) }, cordova run android 这样做不是目的，下面把视频播放用安卓代码播放 首先创建一个 activity_video.xml <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <EditText android:id="@+id/editText" android:layout_width="match_parent" android:layout_height="wrap_content" android:ems="10" android:inputType="textPersonName" android:text="你好-new-activity" /> <VideoView android:layout_width="match_parent" android:layout_height="200dp" android:id="@+id/videView"/> </LinearLayout> 对应的VideoActivity.class package plugins.com.demo; import android.app.Activity; import android.net.Uri; import android.os.Bundle; import android.widget.MediaController; import android.widget.VideoView; /** * Created by Administrator on 2018/1/22. */ public class VideoActivity extends Activity{ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_new); VideoView videoView = (VideoView)findViewById(R.id.videView); MediaController mc = new MediaController(this); videoView.setVideoURI(Uri.parse("http://127.0.0.1:8888/Test/2017.mp4")); videoView.setMediaController(mc); videoView.start(); } } MainActivity里唤起newActivity <?xml version="1.0" encoding="utf-8"?> <android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="plugins.com.demo.MainActivity"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Hello World!" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent" tools:layout_constraintTop_creator="1" tools:layout_constraintRight_creator="1" tools:layout_constraintBottom_creator="1" tools:layout_constraintLeft_creator="1" android:id="@+id/textView" /> <Button android:layout_width="291dp" android:layout_height="49dp" android:text="newActive" android:layout_marginStart="27dp" app:layout_constraintBaseline_toBaselineOf="@+id/textView" tools:layout_constraintBaseline_creator="1" tools:layout_constraintLeft_creator="1" app:layout_constraintLeft_toLeftOf="parent" android:layout_marginLeft="36dp" android:id="@+id/btnNewActivity"/> </android.support.constraint.ConstraintLayout> 记得加入网络读权限 同时加入js 可以调用的类VideoNewActivity.java public class VideoNewActivity extends CordovaPlugin{ @Override public boolean execute(String action, JSONArray args, CallbackContext callbackContext) throws JSONException { super.execute(action, args, callbackContext); if (action.equals("showVideo")) { Context ctx = cordova.getActivity().getApplicationContext(); Intent viodeIntent = new Intent(ctx, VideoActivity.class); this.cordova.getActivity().startActivity(viodeIntent); return true; } return false; } } 在安卓项目下完成组件的java代码，剩下的就是打包插件 同样的味道还是 plugman, 但是这样直接打包是不对的cordova不能直接识别findViewById, so改下android代码 public class VideoNewActivity extends CordovaPlugin{ @Override public boolean execute(String action, JSONArray args, CallbackContext callbackContext) throws JSONException { super.execute(action, args, callbackContext); if (action.equals("showVideo")) { Context ctx = cordova.getActivity().getApplicationContext(); Intent viodeIntent = new Intent(ctx, VideoActivity.class); this.cordova.getActivity().startActivity(viodeIntent); return true; } return false; } } public class VideoActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); String packageName = getApplication().getPackageName(); setContentView(getApplication().getResources().getIdentifier("activity_video", "layout", packageName)); int video = getApplication().getResources().getIdentifier("videView", "id", packageName); VideoView videoView = (VideoView)findViewById(video); MediaController mc = new MediaController(this); videoView.setVideoURI(Uri.parse("http://127.0.0.1:8888/Test/2017.mp4")); videoView.setMediaController(mc); videoView.start(); } } index.js 代码 onDeviceReady: function() { this.receivedEvent('deviceready'); document.getElementById('demo').addEventListener('click', function(e) { VideoNewActivity.playVideo('click', function(e) { alert(str + 'video-succc') }, function(err) { alert(err) }); }) }, plugins-com-video.js var exec = require('cordova/exec'); module.exports = { playVideo: function (arg0, success, error) { exec(success, error, 'VideoNewActivity', 'showVideo', [arg0]); } } plugin.xml配置如下 <?xml version='1.0' encoding='utf-8'?> <plugin id="plugins.com.VideoNewActivity" version="1.0.0" xmlns="http://apache.org/cordova/ns/plugins/1.0" xmlns:android="http://schemas.android.com/apk/res/android"> <name>VideoNewActivity</name> <js-module name="VideoNewActivity" src="www/plugins-com-video.js"> <clobbers target="VideoNewActivity" /> </js-module> <platform name="android"> <config-file target="res/xml/config.xml" parent="/*"> <feature name="VideoNewActivity"> <param name="android-package" value="plugins.com.demo.VideoNewActivity"/> </feature> </config-file> <source-file src="src/android/VideoNewActivity.java" target-dir="src/plugins/com/demo"/> <config-file target="AndroidManifest.xml" parent="/manifest/application"> <!-- /manifest/application activity 才能写入 application 里 --> <uses-permission android:name="android.permission.INTERNET" /> <activity android:label="VideoActivity" android:name="plugins.com.demo.VideoActivity"></activity> </config-file> <config-file parent="/*" target="AndroidManifest.xml"></config-file> <source-file src="src/android/VideoActivity.java" target-dir="src/plugins/com/demo"/> <source-file src="src/android/activity_video.xml" target-dir="res/layout"/> </platform> </plugin> 注意activity引入的位置 来看个效果图吧···如下···· ------------------------------------------------------------------------------ ------------------------------------------------------------------- ------------------------也可以是样--------------------------------------------------------------- 有不完善敬请更正··········
