在测试cordova开发的安卓APP过程中，使用$cordovaImagePicker.getPictures(options)获取相册照片时，华为机型总是会闪退。
config.xml已经添加了权限
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />
如果先调用相机$cordovaCamera.getPicture(options)弹出权限申请，赋予权限后再调用$cordovaImagePicker.getPictures(options)就不会闪退。
查看了一下调用相机插件cordova-plugin-camera源码org.apache.cordova.camera.CameraLauncher中的方法callTakePicture，可知其做了权限的检测，源码如下：
/**
* 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);
}
}
然后又查看了一下cordova-plugin-image-picker插件com.synconset.ImagePicker.java的源码发现方法execute没有做权限检测直接执行this.cordova.startActivityForResult((CordovaPlugin) this, intent, 0)方法，而这个方法最终调用的是android.app.Activity.java中的startActivityForResult(intent, requestCode)方法。
android.app.Activity.java中startActivityForResult方法的源码：
/**
* 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);
}
可以看到这个方法加了@RequiresPermission，所以在没有权限的情况下直接调用可能会被拒绝。
所以需要在调用前申请权限。
解决：
这是com.synconset.ImagePicker.java插件源码：
/**
* 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");
}
}
}
这是我修改后添加了权限申请的代码：
/**
* 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);
//添加权限申请
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");
}
}
}
这样问题就解决了。