Android Studio:在BitmapFactory.decodeFile上出错
Android Studio:在BitmapFactory.decodeFile上出错
提问于 2019-04-28 00:54:16
我有一个用相机捕捉图像的活动。在快照之后，它将调用以下onActivityResult。我在尝试解码文档时出错(行标记为"ERROR HERE")。一些想法的原因？谢谢
Java
//if you capture image, convert to bitmap, show on screen and call readTextFromImage
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
if (requestCode == REQUEST_PICTURE_CAPTURE) {
Bitmap bitmap = BitmapFactory.decodeFile(pictureFile.getAbsolutePath()); // <--- ERROR HERE
bitmap = Helper.rotateBitmap(bitmap, pictureFile.getAbsolutePath());
image.setImageBitmap(bitmap);
} else if (requestCode == REQUEST_GET_SINGLE_FILE) {
Bitmap bitmap = null;
try {
bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), data.getData());
} catch (Exception e) {
Log.d("Error Receipt: ", e.toString());
}
if (bitmap != null) {
image.setImageBitmap(bitmap);
}
}
//readTextFromImage();
}
}日志目录
04-27 18:25:19.276 16179-16179/com.example.ves.gennaio3 E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.ves.gennaio3, PID: 16179
java.lang.RuntimeException: Unable to resume activity {com.example.ves.gennaio3/com.example.ves.gennaio3.ReceiptActivity}: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=100, result=-1, data=null} to activity {com.example.ves.gennaio3/com.example.ves.gennaio3.ReceiptActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.io.File.getAbsolutePath()' on a null object reference
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3121)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3152)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2495)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1354)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
Caused by: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=100, result=-1, data=null} to activity {com.example.ves.gennaio3/com.example.ves.gennaio3.ReceiptActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.io.File.getAbsolutePath()' on a null object reference
at android.app.ActivityThread.deliverResults(ActivityThread.java:3720)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3107)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3152)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2495)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1354)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.io.File.getAbsolutePath()' on a null object reference
at com.example.ves.gennaio3.ReceiptActivity.onActivityResult(ReceiptActivity.java:184)
at android.app.Activity.dispatchActivityResult(Activity.java:6442)
at android.app.ActivityThread.deliverResults(ActivityThread.java:3716)
at android.app.ActivityThread.performResumeActivity(ActivityThread.java:3107)
at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:3152)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2495)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1354)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 回答 1
Stack Overflow用户
发布于 2019-04-28 01:04:48
因为您还没有实例化pictureFile，所以默认情况下它是null。试一试
String pictureFile = data.getStringExtra("...","defaultPath");
然后你可以使用BitmapFactory.decodeFile..。如果您之前声明了pictureFile路径，请检查您的fileProvider。致敬，Csongi
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原文链接：
https://stackoverflow.com/questions/55882815
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