[英]can't be intent to onActivityresult
private static final int CAMERA_REQUEST = 1337;
private void showCamera() {
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra("category", "camera");
startActivityForResult(cameraIntent, CAMERA_REQUEST);
}
我使用此代碼從相機中拾取圖像。 這是我的活動結果
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST ) {
filePath = data.getData();
try {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), filePath);
imageView.setImageBitmap(bitmap);
Toast.makeText(this, data.getDataString(), Toast.LENGTH_SHORT).show();
} catch (IOException e) {
e.printStackTrace();
}
}
else if (requestCode == CAMERA_REQUEST) {
filePath = data.getData();
Log.i("hello", "REQUEST cALL");
try {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), filePath);
imageView.setImageBitmap(bitmap);
} catch (Exception e) {
Log.i("hello", "Exception" + e.getMessage());
}
}
相機很好。 我可以捕捉到它
但是為什么imageview
無法從相機中拾取照片?
但是如果我從存儲中選擇, imageview
可以更改圖像。 你能看到錯誤的代碼嗎?
data.getData();
這個沒有給你捕獲圖像的文件filepath
你可以跟隨這個
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
Bitmap photo = (Bitmap) data.getExtras().get("data");
//get the URI of the bitmap from camera result
Uri uri = getImageUri(getApplicationContext(), photo);
// convert the URI to its real file path.
String filePath = getRealPathFromURI(uri);
}
此方法獲取位圖的URI,可用於將其轉換為文件路徑
public Uri getImageUri(Context inContext, Bitmap inImage) {
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
inImage.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
String path = Images.Media.insertImage(inContext.getContentResolver(), inImage, "Title", null);
return Uri.parse(path);
}
此方法將URI轉換為文件路徑
public String getRealPathFromURI(Uri uri) {
String path = "";
if (getContentResolver() != null) {
Cursor cursor = getContentResolver().query(uri, null, null, null, null);
if (cursor != null) {
cursor.moveToFirst();
int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
path = cursor.getString(idx);
cursor.close();
}
}
return path;
}
試試這個,希望對您有所幫助。
if (requestCode == CAMERA_REQUEST) {
Bitmap bitmap= (Bitmap) data.getExtras().get("data");
imageView.setImageBitmap(bitmap);
}
要使用圖像文件路徑,您必須執行以下操作
1)編寫創建圖像文件的方法
String currentPhotoPath;
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
currentPhotoPath = image.getAbsolutePath();
return image;
}
2)呼叫相機意圖
private void showCamera() {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
// Error occurred while creating the File
}
// Continue only if the File was successfully created
if (photoFile != null) {
Uri photoURI = FileProvider.getUriForFile(this,
"com.example.android.fileprovider",
photoFile);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
}
}
}
3)現在,您需要配置FileProvider。 在您的應用清單中,將提供程序添加到您的應用中:
<application>
...
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="${applicationId}.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths"></meta-data>
</provider>
...
</application>
4)創建資源文件res/xml/file_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="my_images"
path="Android/data/com.example.package.name/files/Pictures" />
</paths>
注意:請確保將com.example.package.name
替換為應用程序的實際包名稱。
5)獲取imageFilePath
if (requestCode == CAMERA_REQUEST) {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), currentPhotoPath);
imageView.setImageBitmap(bitmap);
// or you can use Glide to show image
Glide.with(this).load(currentPhotoPath).into(imageView);
}
希望它能如您所願。 有關詳細信息,請參見google 官方文檔 !
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