Question

我正在关注简单地拍摄照片 Android developers guide 除了将图片保存到图库之外，一切似乎都正常工作。

所有代码均来自指南，如下所示：

我有一个启动摄像头意图的浮动操作按钮

FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            dispatchTakePictureIntent();


        }
    });



 private void dispatchTakePictureIntent() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    // Ensure that there's a camera activity to handle the intent
    if (takePictureIntent.resolveActivity(getPackageManager()) != null) {
        // Create the File where the photo should go
        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,
                    "packagename.fileprovider",
                    photoFile);
            takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
            startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);

        }
    }

}

   @Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
        setPic();
        galleryAddPic();
    }
}

  private File createImageFile() throws IOException {
    // Create an image file name
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    String imageFileName = "JPEG_testimage" + 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
    mCurrentPhotoPath = image.getAbsolutePath();
    return image;
}

 private void galleryAddPic() {
    Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
    File f = new File(mCurrentPhotoPath);
    Uri contentUri = Uri.fromFile(f);
    mediaScanIntent.setData(contentUri);
    this.sendBroadcast(mediaScanIntent);
}

清单：

<!-- To auto-complete the email text field in the login form with the user's emails -->
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.READ_PROFILE" />
<uses-permission android:name="android.permission.READ_CONTACTS" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />


<uses-feature
    android:name="android.hardware.camera"
    android:required="true" />

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name"
        android:theme="@style/AppTheme.NoActionBar">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <provider
        android:name="android.support.v4.content.FileProvider"
        android:authorities= "packagename.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>

file_paths.xml：

 <paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="my_images" path="Android/data/packagename/files/Pictures" />

Answer 1

确保您已请求和/或具有存储权限

MediaStore.Images.Media.insertImage(getContentResolver(), file.getAbsolutePath(), file.getName()/*file name*/, file.getName()/*description*/);

Answer 2

请一次尝试使用此file_path.xml文件。不久前，我偶然遇到了同样的问题，我不得不将path标签的external-file-path属性替换为.来进行修复。由于您正在调用getExternalFileDir()方法，因此我想用external-files-path指定路径。

<?xml version="1.0" encoding="utf-8"?>
<paths>
<external-files-path
    name="my_images"
    path="." />
</paths>

使用此xml，您将共享一个根目录，该根目录将在该根目录内的子目录名中起作用。如果要指定确切的子目录，则需要提供path属性，如下所示： path="Android/data/<com.example.package.name>/files/Pictures"用您应用程序的确切程序包名称替换com.example.package.name。

Android相机教程 - galleryaddpic无效

2 个答案: