h5开发之cordova/phonegap自定义组件调用android native代码-阿里云开发者社区

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

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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

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把java代码复制到 src目录下新建android 目录

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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

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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

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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>

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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····