android下载插件

妖狐艹你老母 2022-01-13 23:59 406阅读 0赞

[2019独角兽企业重金招聘Python工程师标准>>> ][2019_Python_] ![hot3.png][]

FileDownLoadPlugin.java :

package org.apache.cordova; import java.io.BufferedOutputStream; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileOutputStream; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; import org.apache.cordova.api.Plugin; import org.apache.cordova.api.PluginResult; import org.json.JSONArray; import org.json.JSONObject; import android.graphics.Bitmap; import android.graphics.Bitmap.CompressFormat; import android.graphics.BitmapFactory; import android.os.Environment; import android.util.Log; public class FileDownLoadPlugin extends Plugin { private static final String ACTION_PIC = "pic"; private static final String STORE_PATH="wellapp/download/"; public PluginResult execute(String action, JSONArray data, String callBackId) { // FileDownLoadPlugin plugin = this; PluginResult result = null; try { if (ACTION_PIC.equalsIgnoreCase(action)) { String urlStr = data.getString(1)+"?picId="+data.getString(0); Log.d("FileDownLoadPlugin execute", ACTION_PIC); // this.showDatePicker(callBackId); this.getImage(urlStr,data.getString(0)+".jpg"); JSONObject userChoice = new JSONObject(); userChoice.put("", ""); result = new PluginResult(PluginResult.Status.OK,userChoice); result.setKeepCallback(true); // plugin.success(result, callBackId); return result; } }catch(Exception e){ e.printStackTrace(); } return null; } public byte[] getImage(String urlStr,String fileName) throws Exception { Environment.getExternalStorageDirectory(); URL url = new URL(urlStr); HttpURLConnection conn = (HttpURLConnection) url.openConnection();// 基于HTTP协议的连接对象 conn.setConnectTimeout(5000);// 请求超时时间 5s conn.setRequestMethod("GET");// 请求方式 Log.i("ResponseCode", "prepare"); Log.i("ResponseCode", conn.getResponseCode() + ""); if (conn.getResponseCode() == 200) {// 响应码==200 请求成功 InputStream inputStream = conn.getInputStream();// 得到输入流 Log.i("ResponseCode", inputStream.toString().length() + ""); ByteArrayOutputStream arrayOutputStream = new ByteArrayOutputStream(); byte[] buffer = new byte[1024]; int len = 0; Log.i("ResponseCode", "inputStream.read(buffer) :" + inputStream.read(buffer) + ""); while ((len = inputStream.read(buffer)) != -1) { arrayOutputStream.write(buffer, 0, len); Log.i("ResponseCode", "buffer.length :" + buffer.length + " " + len); } inputStream.close(); Log.i("ResponseCode", "arrayOutputStream.toByteArray().length :" + arrayOutputStream.toByteArray().length + ""); File extDir = Environment.getExternalStorageDirectory(); File fullFilename =new File(extDir,fileName); if(!fullFilename.exists()){ fullFilename.mkdirs(); } fullFilename.setWritable(Boolean.TRUE); // File imageFile = new File("BeautyGirl.txt"); FileOutputStream outStream = new FileOutputStream(fullFilename); BufferedOutputStream bos = new BufferedOutputStream(outStream); bos.write(arrayOutputStream.toByteArray()); //此步骤保存的jpg未能打开，提示已损坏... //写入数据 // YuvImage yuvimage=new YuvImage(arrayOutputStream.toByteArray(), ImageFormat.NV21, 20,20, null); // yuvimage.compressToJpeg(new Rect(0, 0,20, 20), 80, arrayOutputStream); // outStream.write(arrayOutputStream.toByteArray()); //TODO 此处获取bitmap为空，未知原因，如何解决？？？ // Bitmap bitmap = BitmapFactory.decodeByteArray(arrayOutputStream.toByteArray(), 0,arrayOutputStream.toByteArray().length); // bitmap.compress(CompressFormat.JPEG, 100, bos); //关闭输出流 arrayOutputStream.close(); outStream.close(); } return null; } }

phonegap-filedownload.js

/**
     * 下载文件插件
     * 
     * @author cjianquan
     * @since 2014-07-18
     * 
     */
    var FileDownLoad = function() {
    };
    FileDownLoad.prototype.downLoadFile = function(action, successCallback,
    		failureCallback,args) {
    	return PhoneGap.exec(successCallback, // Success callback from the plugin
    	failureCallback, // Error callback from the plugin
    	'FileDownLoadPlugin', // Tell PhoneGap to run "FileDownLoadPlugin" Plugin
    	action, // Tell plugin, which action we want to perform
    	args); // Passing list of args to the plugin
    };
    
    /**
     * 
     */
    
    PhoneGap.addConstructor(function() {
    	// 如果不支持window.plugins,则创建并设置
    	if (!window.plugins) {
    		window.plugins = {};
    	}
    	window.plugins.FileDownLoadPlugin = new FileDownLoad();
    	// 向phonegap中注入插件相关的js
    	// Register the javascript plugin with PhoneGap
    	PhoneGap.addPlugin('FileDownLoadPlugin', new FileDownLoad());
    	// phonegap中注入后台插件相关的java类
    	// Register the native class of plugin with PhoneGap
    	PluginManager.addService("FileDownLoadPlugin",
    			"org.apache.cordova.FileDownLoadPlugin");
    });

转载于:https://my.oschina.net/u/2552902/blog/543840

[2019_Python_]: https://my.oschina.net/u/2663968/blog/3061697
[hot3.png]: /images/20220113/d90e657fae894854a9f55aaf4d82a17c.png