继承CordovaPlugin类实现Activity调用

package com.jiatianxia.version;import java.io.BufferedReader;import java.io.File;import java.io.FileOutputStream;import java.io.InputStream;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;import org.apache.cordova.CallbackContext;import org.apache.cordova.CordovaPlugin;import org.apache.http.HttpEntity;import org.apache.http.HttpResponse;import org.apache.http.client.HttpClient;import org.apache.http.client.methods.HttpGet;import org.apache.http.impl.client.DefaultHttpClient;import org.json.JSONArray;import org.json.JSONException;import org.json.JSONObject;import android.app.AlertDialog;import android.app.Dialog;import android.app.ProgressDialog;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.content.pm.PackageManager.NameNotFoundException;import android.net.Uri;import android.os.Environment;import android.os.Handler;import android.os.Message;import android.util.Log;public class Version extends CordovaPlugin{// 作为回调传递参数CallbackContext callbackContext;String newVerName = "";// 新版本名称int newVerCode = -1;// 新版本号ProgressDialog pd = null;String UPDATE_SERVERAPK = "软件.apk";@Overridepublic boolean execute(String action, JSONArray args,CallbackContext callbackContext) throws JSONException {this.callbackContext = callbackContext;if (action.equals("upVersion")) {updateVersion();callbackContext.success("调用成功");} else {return false;}callbackContext.success();return true;}// 判断是否更新版本public void updateVersion() {if (getServerVer()) {int verCode = this.getVerCode(cordova.getActivity());if (newVerCode > verCode) {doNewVersionUpdate();// 更新版本} else {notNewVersionUpdate();// 提示已是最新版本}}}/** * 获得版本号 */public int getVerCode(Context context) {int verCode = -1;try {String packName = context.getPackageName();verCode = context.getPackageManager().getPackageInfo(packName, 0).versionCode;} catch (NameNotFoundException e) {// TODO Auto-generated catch blockLog.e("版本号获取异常", e.getMessage());}return verCode;}/** * 获得版本名称 */public String getVerName(Context context) {String verName = "";try {String packName = context.getPackageName();verName = context.getPackageManager().getPackageInfo(packName, 0).versionName;} catch (NameNotFoundException e) {Log.e("版本名称获取异常", e.getMessage());}return verName;}/** * 从服务器端获得版本号与版本名称 *  * @return */public boolean getServerVer() {try {URL url = new URL("服务器路径/version.text");HttpURLConnection httpConnection = (HttpURLConnection) url.openConnection();httpConnection.setDoInput(true);httpConnection.setDoOutput(true);httpConnection.setRequestMethod("GET");httpConnection.connect();InputStreamReader reader = new InputStreamReader(httpConnection.getInputStream());BufferedReader bReader = new BufferedReader(reader);String json = bReader.readLine();JSONArray array = new JSONArray(json);JSONObject jsonObj = array.getJSONObject(0);newVerCode = Integer.parseInt(jsonObj.getString("verCode"));newVerName = jsonObj.getString("verName");} catch (Exception e) {e.printStackTrace();return false;// 如果这里改为true 则不更新会退出程序}return true;}/** * 不更新版本 */public void notNewVersionUpdate() {int verCode = this.getVerCode(cordova.getActivity());String verName = this.getVerName(cordova.getActivity());StringBuffer sb = new StringBuffer();sb.append("当前版本：");sb.append(verName);sb.append(" Code:");sb.append(verCode);sb.append("\n已是最新版本，无需更新");Dialog dialog = new AlertDialog.Builder(cordova.getActivity()).setTitle("软件更新").setMessage(sb.toString()).setPositiveButton("确定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stub// finish();}}).create();dialog.show();}/** * 下载apk */public void downFile(final String url) {pd.show();new Thread() {public void run() {HttpClient client = new DefaultHttpClient();HttpGet get = new HttpGet(url);HttpResponse response;try {response = client.execute(get);HttpEntity entity = response.getEntity();long length = entity.getContentLength();InputStream is = entity.getContent();FileOutputStream fileOutputStream = null;if (is != null) {File file = new File(Environment.getExternalStorageDirectory(),UPDATE_SERVERAPK);fileOutputStream = new FileOutputStream(file);byte[] b = new byte[1024];int charb = -1;int count = 0;while ((charb = is.read(b)) != -1) {fileOutputStream.write(b, 0, charb);count += charb;}}fileOutputStream.flush();if (fileOutputStream != null) {fileOutputStream.close();}down();} catch (Exception e) {// TODO Auto-generated catch blocke.printStackTrace();}}}.start();}/** * 更新版本 */public void doNewVersionUpdate() {int verCode = this.getVerCode(cordova.getActivity());String verName = this.getVerName(cordova.getActivity());StringBuffer sb = new StringBuffer();sb.append("当前版本：");sb.append(verName);sb.append(" Code:");sb.append(verCode);sb.append(",发现版本：");sb.append(newVerName);sb.append(" Code:");sb.append(newVerCode);sb.append(",是否更新");Dialog dialog = new AlertDialog.Builder(cordova.getActivity()).setTitle("软件更新").setMessage(sb.toString()).setPositiveButton("更新", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {// TODO Auto-generated method stubpd = new ProgressDialog(cordova.getActivity());pd.setTitle("正在下载");pd.setMessage("请稍后");pd.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);pd.setCancelable(false);new Thread() {double progress = 0;public void run() {try {while (progress < 94) {// 由线程来控制进度pd.setProgress((int) (progress += 0.18));Thread.sleep(100);}while (progress > 100) {pd.cancel();}} catch (Exception e) {pd.cancel();}}}.start();downFile("服务器路径/软件名.apk");}}).setNegativeButton("暂不更新",new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog,int which) {// TODO Auto-generated method stub// finish();}}).create();// 显示更新框dialog.show();}Handler handler = new Handler() {@Overridepublic void handleMessage(Message msg) {super.handleMessage(msg);pd.cancel();update();}};/** * 下载完成，通过handler将下载对话框取消 */public void down() {new Thread() {public void run() {Message message = handler.obtainMessage();handler.sendMessage(message);}}.start();}/** * 安装应用 */public void update() {Intent intent = new Intent(Intent.ACTION_VIEW);intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory(), UPDATE_SERVERAPK)),"application/vnd.android.package-archive");cordova.getActivity().startActivity(intent);}}

在上面的代码中我们通过Version extends CordovaPlugin类实现了不是Activity也可以进行对Activity的调用。关键方法

cordova.getActivity()