二维玛扫描phonegap插件

package com.easyway.barcode; import org.json.JSONArray; import org.json.JSONException; import android.app.Activity; import android.app.AlertDialog; import android.content.ActivityNotFoundException; import android.content.DialogInterface; import android.content.Intent; import android.net.Uri; import com.phonegap.api.PhonegapActivity; import com.phonegap.api.Plugin; import com.phonegap.api.PluginResult; /** * 扩展二维码扫描的phonegap类实现 * 实现原理如下： * 1.使用phonegap的js类库实现通过插件调用相关的Plugin java类。 * 2.plugin调用zxing相关的二维码扫码的方法实现。 * 3.如果调用zxing没有安装，到google下载相关的zxing apk安装，并调用对应的intent实现。 * * This calls out to the ZXing barcode reader and returns the result. */ public class BarcodeScanner extends Plugin { public static final int REQUEST_CODE = 0x0ba7c0de; public static final String defaultInstallTitle = "Install Barcode Scanner?"; public static final String defaultInstallMessage = "This requires the free Barcode Scanner app. Would you like to install it now?"; public static final String defaultYesString = "Yes"; public static final String defaultNoString = "No"; public String callback; /** * Constructor. */ public BarcodeScanner() { } /** * * 用于plugin相关的方法，用于暴露相关的方法使用。 * * Executes the request and returns PluginResult. * * @param action The action to execute. * @param args JSONArray of arguments for the plugin. * @param callbackId The callback id used when calling back into JavaScript. * @return A PluginResult object with a status and message. */ public PluginResult execute(String action, JSONArray args, String callbackId) { this.callback = callbackId; try { if (action.equals("encode")) { String type = null; if(args.length() > 0) { type = args.getString(0); } String data = null; if(args.length() > 1) { data = args.getString(1); } String installTitle = defaultInstallTitle; if(args.length() > 2) { installTitle = args.getString(2); } String installMessage = defaultInstallMessage; if(args.length() > 3) { installMessage = args.getString(3); } String yesString = defaultYesString; if(args.length() > 4) { yesString = args.getString(4); } String noString = defaultNoString; if(args.length() > 5) { noString = args.getString(5); } // if data.TypeOf() == Bundle, then call // encode(type, Bundle) // else // encode(type, String) this.encode(type, data, installTitle, installMessage, yesString, noString); } else if (action.equals("scan")) { String barcodeTypes = null; if(args.length() > 0) { barcodeTypes = args.getString(0); } String installTitle = defaultInstallTitle; if(args.length() > 1) { installTitle = args.getString(1); } String installMessage = defaultInstallMessage; if(args.length() > 2) { installMessage = args.getString(2); } String yesString = defaultYesString; if(args.length() > 3) { yesString = args.getString(3); } String noString = defaultNoString; if(args.length() > 4) { noString = args.getString(4); } scan(barcodeTypes, installTitle, installMessage, yesString, noString); } else { return new PluginResult(PluginResult.Status.INVALID_ACTION); } PluginResult r = new PluginResult(PluginResult.Status.NO_RESULT); r.setKeepCallback(true); return r; } catch (JSONException e) { e.printStackTrace(); return new PluginResult(PluginResult.Status.JSON_EXCEPTION); } } /** * 扫描二维码的方法 * 备注：在扫描二维码的类型最好不好设置，在前期的zxing可能需要，在后期的版本中不需要， * zxing会自动检索二维码的类型，并识别相关二维码。 * * Initiates a barcode scan. If the ZXing scanner isn't installed, the user * will be prompted to install it. * @param types The barcode types to accept * @param installTitle The title for the dialog box that prompts the user to install the scanner * @param installMessage The message prompting the user to install the barcode scanner * @param yesString The string "Yes" or localised equivalent * @param noString The string "No" or localised version */ public void scan(String barcodeFormats, String installTitle, String installMessage, String yesString, String noString ) { Intent intentScan = new Intent("com.google.zxing.client.android.SCAN"); // intentScan.addCategory(Intent.CATEGORY_DEFAULT); //设置扫描特定类型的二维码 //if (barcodeFormats != null) { // Tell the scanner what types we're after // intentScan.putExtra("SCAN_FORMATS", barcodeFormats); // } try { this.ctx.startActivityForResult((Plugin) this, intentScan, REQUEST_CODE); } catch (ActivityNotFoundException e) { showDownloadDialog(installTitle, installMessage, yesString, noString); } } /** * 用于获取二维码扫描之后获取相关的二维码相关的信息 * Called when the barcode scanner exits * * @param requestCode The request code originally supplied to startActivityForResult(), *