華爲機型cordova-plugin-image-picker讀取圖庫閃退

在測試cordova開發的安卓APP過程當中，使用$cordovaImagePicker.getPictures(options)獲取相冊照片時，華爲機型老是會閃退。

config.xml已經添加了權限

 <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
 <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 <uses-permission android:name="android.permission.CAMERA" />

 

若是先調用相機$cordovaCamera.getPicture(options)彈出權限申請，賦予權限後再調用$cordovaImagePicker.getPictures(options)就不會閃退。

查看了一下調用相機插件cordova-plugin-camera源碼org.apache.cordova.camera.CameraLauncher中的方法callTakePicture，可知其作了權限的檢測，源碼以下：

/**
     * Take a picture with the camera.
     * When an image is captured or the camera view is cancelled, the result is returned
     * in CordovaActivity.onActivityResult, which forwards the result to this.onActivityResult.
     *
     * The image can either be returned as a base64 string or a URI that points to the file.
     * To display base64 string in an img tag, set the source to:
     *      img.src="data:image/jpeg;base64,"+result;
     * or to display URI in an img tag
     *      img.src=result;
     *
     * @param returnType        Set the type of image to return.
     * @param encodingType           Compression quality hint (0-100: 0=low quality & high compression, 100=compress of max quality)
     */
    public void callTakePicture(int returnType, int encodingType) {
        boolean saveAlbumPermission = PermissionHelper.hasPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE);
        boolean takePicturePermission = PermissionHelper.hasPermission(this, Manifest.permission.CAMERA);

        // CB-10120: The CAMERA permission does not need to be requested unless it is declared
        // in AndroidManifest.xml. This plugin does not declare it, but others may and so we must
        // check the package info to determine if the permission is present.

        if (!takePicturePermission) {
            takePicturePermission = true;
            try {
                PackageManager packageManager = this.cordova.getActivity().getPackageManager();
                String[] permissionsInPackage = packageManager.getPackageInfo(this.cordova.getActivity().getPackageName(), PackageManager.GET_PERMISSIONS).requestedPermissions;
                if (permissionsInPackage != null) {
                    for (String permission : permissionsInPackage) {
                        if (permission.equals(Manifest.permission.CAMERA)) {
                            takePicturePermission = false;
                            break;
                        }
                    }
                }
            } catch (NameNotFoundException e) {
                // We are requesting the info for our package, so this should
                // never be caught
            }
        }

        if (takePicturePermission && saveAlbumPermission) {
            takePicture(returnType, encodingType);
        } else if (saveAlbumPermission && !takePicturePermission) {
            PermissionHelper.requestPermission(this, TAKE_PIC_SEC, Manifest.permission.CAMERA);
        } else if (!saveAlbumPermission && takePicturePermission) {
            PermissionHelper.requestPermission(this, TAKE_PIC_SEC, Manifest.permission.READ_EXTERNAL_STORAGE);
        } else {
            PermissionHelper.requestPermissions(this, TAKE_PIC_SEC, permissions);
        }
    }

而後又查看了一下cordova-plugin-image-picker插件com.synconset.ImagePicker.java的源碼發現方法execute沒有作權限檢測直接執行this.cordova.startActivityForResult((CordovaPlugin) this, intent, 0)方法，而這個方法最終調用的是android.app.Activity.java中的startActivityForResult(intent, requestCode)方法。

android.app.Activity.java中startActivityForResult方法的源碼：

/**
     * Same as calling {@link #startActivityForResult(Intent, int, Bundle)}
     * with no options.
     *
     * @param intent The intent to start.
     * @param requestCode If >= 0, this code will be returned in
     *                    onActivityResult() when the activity exits.
     *
     * @throws android.content.ActivityNotFoundException
     *
     * @see #startActivity
     */
    public void startActivityForResult(@RequiresPermission Intent intent, int requestCode) {
        startActivityForResult(intent, requestCode, null);
    }

能夠看到這個方法加了@RequiresPermission，因此在沒有權限的狀況下直接調用可能會被拒絕。

因此須要在調用前申請權限。

解決：

這是com.synconset.ImagePicker.java插件源碼：

/**
 * An Image Picker Plugin for Cordova/PhoneGap.
 */
package com.synconset;

import org.apache.cordova.CallbackContext;
import org.apache.cordova.CordovaPlugin;

import org.apache.cordova.PermissionHelper;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;

import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.util.Log;

public class ImagePicker extends CordovaPlugin {
    public static String TAG = "ImagePicker";
     
    private CallbackContext callbackContext;
    private JSONObject params;
     
    public boolean execute(String action, final JSONArray args, final CallbackContext callbackContext) throws JSONException {
         this.callbackContext = callbackContext;
         this.params = args.getJSONObject(0);
        if (action.equals("getPictures")) {
            Intent intent = new Intent(cordova.getActivity(), MultiImageChooserActivity.class);
            int max = 20;
            int desiredWidth = 0;
            int desiredHeight = 0;
            int quality = 100;
            if (this.params.has("maximumImagesCount")) {
                max = this.params.getInt("maximumImagesCount");
            }
            if (this.params.has("width")) {
                desiredWidth = this.params.getInt("width");
            }
            if (this.params.has("height")) {
                desiredHeight = this.params.getInt("height");
            }
            if (this.params.has("quality")) {
                quality = this.params.getInt("quality");
            }
            intent.putExtra("MAX_IMAGES", max);
            intent.putExtra("WIDTH", desiredWidth);
            intent.putExtra("HEIGHT", desiredHeight);
            intent.putExtra("QUALITY", quality);

　　　　　　　if (this.cordova != null) {
                 this.cordova.startActivityForResult((CordovaPlugin) this, intent, 0);
            }
        }
        return true;
    }
    
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode == Activity.RESULT_OK && data != null) {
            ArrayList<String> fileNames = data.getStringArrayListExtra("MULTIPLEFILENAMES");
            JSONArray res = new JSONArray(fileNames);
            this.callbackContext.success(res);
        } else if (resultCode == Activity.RESULT_CANCELED && data != null) {
            String error = data.getStringExtra("ERRORMESSAGE");
            this.callbackContext.error(error);
        } else if (resultCode == Activity.RESULT_CANCELED) {
            JSONArray res = new JSONArray();
            this.callbackContext.success(res);
        } else {
            this.callbackContext.error("No images selected");
        }
    }
}

 

這是我修改後添加了權限申請的代碼：

/**
 * An Image Picker Plugin for Cordova/PhoneGap.
 */
package com.synconset;

import org.apache.cordova.CallbackContext;
import org.apache.cordova.CordovaPlugin;

import org.apache.cordova.PermissionHelper;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;

import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.util.Log;

public class ImagePicker extends CordovaPlugin {
    public static String TAG = "ImagePicker";
     
    private CallbackContext callbackContext;
    private JSONObject params;
     
    public boolean execute(String action, final JSONArray args, final CallbackContext callbackContext) throws JSONException {
         this.callbackContext = callbackContext;
         this.params = args.getJSONObject(0);
        if (action.equals("getPictures")) {
            Intent intent = new Intent(cordova.getActivity(), MultiImageChooserActivity.class);
            int max = 20;
            int desiredWidth = 0;
            int desiredHeight = 0;
            int quality = 100;
            if (this.params.has("maximumImagesCount")) {
                max = this.params.getInt("maximumImagesCount");
            }
            if (this.params.has("width")) {
                desiredWidth = this.params.getInt("width");
            }
            if (this.params.has("height")) {
                desiredHeight = this.params.getInt("height");
            }
            if (this.params.has("quality")) {
                quality = this.params.getInt("quality");
            }
            intent.putExtra("MAX_IMAGES", max);
            intent.putExtra("WIDTH", desiredWidth);
            intent.putExtra("HEIGHT", desiredHeight);
            intent.putExtra("QUALITY", quality);
            //添加權限申請
            boolean saveAlbumPermission = PermissionHelper.hasPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE);
            if(!saveAlbumPermission){
                PermissionHelper.requestPermission(this, 0, Manifest.permission.READ_EXTERNAL_STORAGE);
            }else{
                if (this.cordova != null) {
                    this.cordova.startActivityForResult((CordovaPlugin) this, intent, 0);
                }
            }
        }
        return true;
    }
    
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (resultCode == Activity.RESULT_OK && data != null) {
            ArrayList<String> fileNames = data.getStringArrayListExtra("MULTIPLEFILENAMES");
            JSONArray res = new JSONArray(fileNames);
            this.callbackContext.success(res);
        } else if (resultCode == Activity.RESULT_CANCELED && data != null) {
            String error = data.getStringExtra("ERRORMESSAGE");
            this.callbackContext.error(error);
        } else if (resultCode == Activity.RESULT_CANCELED) {
            JSONArray res = new JSONArray();
            this.callbackContext.success(res);
        } else {
            this.callbackContext.error("No images selected");
        }
    }
}

 

這樣問題就解決了。