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我想在从相机捕获图像以识别我捕获的图像后传递额外的意图。对于我,从相机捕获图像后传递额外的意图
int TAKE_PHOTO_CODE = 0;
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
startActivityForResult(cameraIntent, TAKE_PHOTO_CODE);
在响应,
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == TAKE_PHOTO_CODE && resultCode == EditProfileActivity.RESULT_OK) {
Log.d("CameraDemo", "Pic saved");
// Get passed intent here...
System.out.println("EXTRA INTENT: "+data.getStringExtra("profile_pic"));
}
}
上面的代码工作正常。我在本地存储中获取图像。但是,我想再传递一个字符串意图。
喜欢的东西,
cameraIntent.putExtra("profile_pic", "true");
而且在响应方面我想这一意图。但是,我得到nullpointer exception
。传递意图的正确方法是什么?
堆栈跟踪
01-09 13:29:36.228 23214-23214/com.example.android.navigationdrawerexample E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.example.android.navigationdrawerexample, PID: 23214
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=0, result=-1, data=null} to activity {com.example.android.navigationdrawerexample/com.example.android.mtesapp.EditProfileActivity}: java.lang.NullPointerException
at android.app.ActivityThread.deliverResults(ActivityThread.java:3942)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3992)
at android.app.ActivityThread.access$1300(ActivityThread.java:156)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1403)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5872)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:674)
at dalvik.system.NativeStart.main(Native Method)
Caused by: java.lang.NullPointerException
at com.example.android.mtesapp.EditProfileActivity.onActivityResult(EditProfileActivity.java:316)
at android.app.Activity.dispatchActivityResult(Activity.java:5535)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3938)
at android.app.ActivityThread.handleSendResult(ActivityThread.java:3992)
at android.app.ActivityThread.access$1300(ActivityThread.java:156)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1403)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:157)
at android.app.ActivityThread.main(ActivityThread.java:5872)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:674)
at dalvik.system.NativeStart.main(Native Method)
如果发生崩溃,请放置整个堆栈跟踪。从logcat与您的文章。 – 2015-01-09 18:28:07
@GabeSechan:我已经添加了它。 – 2015-01-09 18:35:06
那你在第316行有一些空值。看看你的示例代码 - 当开始意图时,你正在创建一个本地的Intent变量。它不会在onActivityResult中访问 - 你可能有一个范围问题,你有两个cameraIntent变量,而且全局从未设置?除此之外,我们需要更多onActivityResult的代码。 – 2015-01-09 18:37:52