forked from flutter/packages
-
Notifications
You must be signed in to change notification settings - Fork 1
/
ImagePickerPlugin.java
391 lines (338 loc) · 12.3 KB
/
ImagePickerPlugin.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package io.flutter.plugins.imagepicker;
import android.app.Activity;
import android.app.Application;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import androidx.annotation.NonNull;
import androidx.annotation.VisibleForTesting;
import androidx.lifecycle.DefaultLifecycleObserver;
import androidx.lifecycle.Lifecycle;
import androidx.lifecycle.LifecycleOwner;
import io.flutter.embedding.engine.plugins.FlutterPlugin;
import io.flutter.embedding.engine.plugins.activity.ActivityAware;
import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;
import io.flutter.embedding.engine.plugins.lifecycle.FlutterLifecycleAdapter;
import io.flutter.plugin.common.BinaryMessenger;
import io.flutter.plugin.common.MethodCall;
import io.flutter.plugin.common.MethodChannel;
import io.flutter.plugin.common.PluginRegistry;
import java.io.File;
@SuppressWarnings("deprecation")
public class ImagePickerPlugin
implements MethodChannel.MethodCallHandler, FlutterPlugin, ActivityAware {
private class LifeCycleObserver
implements Application.ActivityLifecycleCallbacks, DefaultLifecycleObserver {
private final Activity thisActivity;
LifeCycleObserver(Activity activity) {
this.thisActivity = activity;
}
@Override
public void onCreate(@NonNull LifecycleOwner owner) {}
@Override
public void onStart(@NonNull LifecycleOwner owner) {}
@Override
public void onResume(@NonNull LifecycleOwner owner) {}
@Override
public void onPause(@NonNull LifecycleOwner owner) {}
@Override
public void onStop(@NonNull LifecycleOwner owner) {
onActivityStopped(thisActivity);
}
@Override
public void onDestroy(@NonNull LifecycleOwner owner) {
onActivityDestroyed(thisActivity);
}
@Override
public void onActivityCreated(Activity activity, Bundle savedInstanceState) {}
@Override
public void onActivityStarted(Activity activity) {}
@Override
public void onActivityResumed(Activity activity) {}
@Override
public void onActivityPaused(Activity activity) {}
@Override
public void onActivitySaveInstanceState(Activity activity, Bundle outState) {}
@Override
public void onActivityDestroyed(Activity activity) {
if (thisActivity == activity && activity.getApplicationContext() != null) {
((Application) activity.getApplicationContext())
.unregisterActivityLifecycleCallbacks(
this); // Use getApplicationContext() to avoid casting failures
}
}
@Override
public void onActivityStopped(Activity activity) {
if (thisActivity == activity) {
activityState.getDelegate().saveStateBeforeResult();
}
}
}
/**
* Move all activity-lifetime-bound states into this helper object, so that {@code setup} and
* {@code tearDown} would just become constructor and finalize calls of the helper object.
*/
private class ActivityState {
private Application application;
private Activity activity;
private ImagePickerDelegate delegate;
private MethodChannel channel;
private LifeCycleObserver observer;
private ActivityPluginBinding activityBinding;
// This is null when not using v2 embedding;
private Lifecycle lifecycle;
// Default constructor
ActivityState(
final Application application,
final Activity activity,
final BinaryMessenger messenger,
final MethodChannel.MethodCallHandler handler,
final PluginRegistry.Registrar registrar,
final ActivityPluginBinding activityBinding) {
this.application = application;
this.activity = activity;
this.activityBinding = activityBinding;
delegate = constructDelegate(activity);
channel = new MethodChannel(messenger, CHANNEL);
channel.setMethodCallHandler(handler);
observer = new LifeCycleObserver(activity);
if (registrar != null) {
// V1 embedding setup for activity listeners.
application.registerActivityLifecycleCallbacks(observer);
registrar.addActivityResultListener(delegate);
registrar.addRequestPermissionsResultListener(delegate);
} else {
// V2 embedding setup for activity listeners.
activityBinding.addActivityResultListener(delegate);
activityBinding.addRequestPermissionsResultListener(delegate);
lifecycle = FlutterLifecycleAdapter.getActivityLifecycle(activityBinding);
lifecycle.addObserver(observer);
}
}
// Only invoked by {@link #ImagePickerPlugin(ImagePickerDelegate, Activity)} for testing.
ActivityState(final ImagePickerDelegate delegate, final Activity activity) {
this.activity = activity;
this.delegate = delegate;
}
void release() {
if (activityBinding != null) {
activityBinding.removeActivityResultListener(delegate);
activityBinding.removeRequestPermissionsResultListener(delegate);
activityBinding = null;
}
if (lifecycle != null) {
lifecycle.removeObserver(observer);
lifecycle = null;
}
if (channel != null) {
channel.setMethodCallHandler(null);
channel = null;
}
if (application != null) {
application.unregisterActivityLifecycleCallbacks(observer);
application = null;
}
activity = null;
observer = null;
delegate = null;
}
Activity getActivity() {
return activity;
}
ImagePickerDelegate getDelegate() {
return delegate;
}
}
static final String METHOD_CALL_IMAGE = "pickImage";
static final String METHOD_CALL_MULTI_IMAGE = "pickMultiImage";
static final String METHOD_CALL_VIDEO = "pickVideo";
private static final String METHOD_CALL_RETRIEVE = "retrieve";
private static final int CAMERA_DEVICE_FRONT = 1;
private static final int CAMERA_DEVICE_REAR = 0;
private static final String CHANNEL = "plugins.flutter.io/image_picker_android";
private static final int SOURCE_CAMERA = 0;
private static final int SOURCE_GALLERY = 1;
private FlutterPluginBinding pluginBinding;
private ActivityState activityState;
@SuppressWarnings("deprecation")
public static void registerWith(io.flutter.plugin.common.PluginRegistry.Registrar registrar) {
if (registrar.activity() == null) {
// If a background flutter view tries to register the plugin, there will be no activity from the registrar,
// we stop the registering process immediately because the ImagePicker requires an activity.
return;
}
Activity activity = registrar.activity();
Application application = null;
if (registrar.context() != null) {
application = (Application) (registrar.context().getApplicationContext());
}
ImagePickerPlugin plugin = new ImagePickerPlugin();
plugin.setup(registrar.messenger(), application, activity, registrar, null);
}
/**
* Default constructor for the plugin.
*
* <p>Use this constructor for production code.
*/
// See also: * {@link #ImagePickerPlugin(ImagePickerDelegate, Activity)} for testing.
public ImagePickerPlugin() {}
@VisibleForTesting
ImagePickerPlugin(final ImagePickerDelegate delegate, final Activity activity) {
activityState = new ActivityState(delegate, activity);
}
@VisibleForTesting
final ActivityState getActivityState() {
return activityState;
}
@Override
public void onAttachedToEngine(FlutterPluginBinding binding) {
pluginBinding = binding;
}
@Override
public void onDetachedFromEngine(FlutterPluginBinding binding) {
pluginBinding = null;
}
@Override
public void onAttachedToActivity(ActivityPluginBinding binding) {
setup(
pluginBinding.getBinaryMessenger(),
(Application) pluginBinding.getApplicationContext(),
binding.getActivity(),
null,
binding);
}
@Override
public void onDetachedFromActivity() {
tearDown();
}
@Override
public void onDetachedFromActivityForConfigChanges() {
onDetachedFromActivity();
}
@Override
public void onReattachedToActivityForConfigChanges(ActivityPluginBinding binding) {
onAttachedToActivity(binding);
}
private void setup(
final BinaryMessenger messenger,
final Application application,
final Activity activity,
final PluginRegistry.Registrar registrar,
final ActivityPluginBinding activityBinding) {
activityState =
new ActivityState(application, activity, messenger, this, registrar, activityBinding);
}
private void tearDown() {
if (activityState != null) {
activityState.release();
activityState = null;
}
}
@VisibleForTesting
final ImagePickerDelegate constructDelegate(final Activity setupActivity) {
final ImagePickerCache cache = new ImagePickerCache(setupActivity);
final File externalFilesDirectory = setupActivity.getCacheDir();
final ExifDataCopier exifDataCopier = new ExifDataCopier();
final ImageResizer imageResizer = new ImageResizer(externalFilesDirectory, exifDataCopier);
return new ImagePickerDelegate(setupActivity, externalFilesDirectory, imageResizer, cache);
}
// MethodChannel.Result wrapper that responds on the platform thread.
private static class MethodResultWrapper implements MethodChannel.Result {
private MethodChannel.Result methodResult;
private Handler handler;
MethodResultWrapper(MethodChannel.Result result) {
methodResult = result;
handler = new Handler(Looper.getMainLooper());
}
@Override
public void success(final Object result) {
handler.post(
new Runnable() {
@Override
public void run() {
methodResult.success(result);
}
});
}
@Override
public void error(
final String errorCode, final String errorMessage, final Object errorDetails) {
handler.post(
new Runnable() {
@Override
public void run() {
methodResult.error(errorCode, errorMessage, errorDetails);
}
});
}
@Override
public void notImplemented() {
handler.post(
new Runnable() {
@Override
public void run() {
methodResult.notImplemented();
}
});
}
}
@Override
public void onMethodCall(MethodCall call, MethodChannel.Result rawResult) {
if (activityState == null || activityState.getActivity() == null) {
rawResult.error("no_activity", "image_picker plugin requires a foreground activity.", null);
return;
}
MethodChannel.Result result = new MethodResultWrapper(rawResult);
int imageSource;
ImagePickerDelegate delegate = activityState.getDelegate();
if (call.argument("cameraDevice") != null) {
ImagePickerDelegate.CameraDevice device;
int deviceIntValue = call.argument("cameraDevice");
if (deviceIntValue == CAMERA_DEVICE_FRONT) {
device = ImagePickerDelegate.CameraDevice.FRONT;
} else {
device = ImagePickerDelegate.CameraDevice.REAR;
}
delegate.setCameraDevice(device);
}
switch (call.method) {
case METHOD_CALL_IMAGE:
imageSource = call.argument("source");
switch (imageSource) {
case SOURCE_GALLERY:
delegate.chooseImageFromGallery(call, result);
break;
case SOURCE_CAMERA:
delegate.takeImageWithCamera(call, result);
break;
default:
throw new IllegalArgumentException("Invalid image source: " + imageSource);
}
break;
case METHOD_CALL_MULTI_IMAGE:
delegate.chooseMultiImageFromGallery(call, result);
break;
case METHOD_CALL_VIDEO:
imageSource = call.argument("source");
switch (imageSource) {
case SOURCE_GALLERY:
delegate.chooseVideoFromGallery(call, result);
break;
case SOURCE_CAMERA:
delegate.takeVideoWithCamera(call, result);
break;
default:
throw new IllegalArgumentException("Invalid video source: " + imageSource);
}
break;
case METHOD_CALL_RETRIEVE:
delegate.retrieveLostImage(result);
break;
default:
throw new IllegalArgumentException("Unknown method " + call.method);
}
}
}