Android onActivityResult在拍照后未调用
我正在做一个android应用程序,我有一个功能,我需要打开相机拍照。在活动上拍照后,不调用Result。我的屏幕仅保持在照相机状态 我的代码:Android onActivityResult在拍照后未调用,android,bitmap,android-camera,onactivityresult,Android,Bitmap,Android Camera,Onactivityresult,我正在做一个android应用程序,我有一个功能,我需要打开相机拍照。在活动上拍照后,不调用Result。我的屏幕仅保持在照相机状态 我的代码: Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); File mediaFile = new File( MediaStore.Images.Media.EXTERNAL_CONTENT_URI.getPath()); Uri imageUri = Uri.from
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File mediaFile = new File(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI.getPath());
Uri imageUri = Uri.fromFile(mediaFile);
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
startActivityForResult(intent, 1);
onActivityResult代码
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (data != null && !data.toString().equalsIgnoreCase("Intent { }"))
switch (requestCode) {
case 1:
Log.i("StartUpActivity", "Photo Captured");
Uri uri = data.getData();
String imgPath = getRealPathFromURI(uri);
bitmap = (Bitmap) data.getExtras().get("data");
MediaStore.Images.Media.insertImage(getContentResolver(),
bitmap, null, null);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
img1.setImageBitmap(bitmap);
}
}
传递从URI创建的图像路径。
onActivityResult
可能会被调用,但是如果语句和开关/case
语句中的语句不会被执行,因为它们永远不会被访问
下面的代码包括两种方法takePhoto
和onActivityResult
,非常简短,效果非常好。看一看,它可能会帮助你
public void takePhoto(View v) {
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent, CAMERA_REQUEST);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1) {
photo = (Bitmap) data.getExtras().get("data");
imageView.setImageBitmap(photo);
}
}
很可能,您的活动会在摄影机完成后重新加载,但您的代码并没有为这种情况做好准备
看 我认为调用了onActivity,但它没有进入if条件
仅在以下情况下检查空值:
if (data != null )
switch (requestCode) {
case 1:
Log.i("StartUpActivity", "Photo Captured");
Uri uri = data.getData();
String imgPath = getRealPathFromURI(uri);
bitmap = (Bitmap) data.getExtras().get("data");
MediaStore.Images.Media.insertImage(getContentResolver(),
bitmap, null, null);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
img1.setImageBitmap(bitmap);
}
在ActivityResult方法上设置断点后,可以在调试模式下运行应用程序,
如果它在从摄像机中取出后停在那里,那么它将被成功调用
您可以更改,如果您使用的语句使代码如下所示:
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (data != null && resultCode = RESULT_OK)
switch (requestCode) {
case 1:
Log.i("StartUpActivity", "Photo Captured");
Uri uri = data.getData();
String imgPath = getRealPathFromURI(uri);
bitmap = (Bitmap) data.getExtras().get("data");
MediaStore.Images.Media.insertImage(getContentResolver(),
bitmap, null, null);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, baos);
img1.setImageBitmap(bitmap);
}
}
请注意,更推荐使用final int作为请求代码,而不是在每次需要时重写它们
比如:
从您调用startActivityForResult(意图,1)的位置,
您在哪里重写了onActivityResult()
我的意思是,如果您从frugment调用startActivityForResult(),那么您应该在片段中重写onActivityResult(),这同样适用于Activity。我认为这可能会对您有所帮助
一步一步地遵循下面的代码,并与您的代码进行比较,以避免出现空异常
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, 1);
1活动结果
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK) {
if (requestCode == 1)
onCaptureImageResult(data);
}
}
public void onCaptureImageResult(Intent data) {
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
Uri tempUri = getImageUri(getApplicationContext(), thumbnail); // call getImageUri
File finalFile = new File(getRealPathFromURI(tempUri));
file_path = finalFile.getPath().toString(); // your file path
imgview.setImageBitmap(thumbnail);
// this code will get your capture image bitmap}
2
onCaptureImageResult
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == Activity.RESULT_OK) {
if (requestCode == 1)
onCaptureImageResult(data);
}
}
public void onCaptureImageResult(Intent data) {
Bitmap thumbnail = (Bitmap) data.getExtras().get("data");
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
thumbnail.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
Uri tempUri = getImageUri(getApplicationContext(), thumbnail); // call getImageUri
File finalFile = new File(getRealPathFromURI(tempUri));
file_path = finalFile.getPath().toString(); // your file path
imgview.setImageBitmap(thumbnail);
// this code will get your capture image bitmap}
3getImageUri
public Uri getImageUri(Context inContext, Bitmap inImage) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String path = MediaStore.Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null); // your capture image URL code
return Uri.parse(path);
}
使用此代码,您的屏幕将不再停留在相机状态,它将完成,图像也将加载,您将获得图像URL。将super.onActivityResult()
作为onActivityResult()覆盖方法上的最后一条指令。请参阅本android指南进行检查:尝试添加一些日志,以验证是否真的调用了onActivityResult。在查看之前,我已经回答了这个问题: