从android中的画廊和相机中捕获图像
Posted
技术标签:
【中文标题】从android中的画廊和相机中捕获图像【英文标题】：Capturing image from gallery & camera in android 【发布时间】：2012-02-23 22:32:01 【问题描述】：首先我知道这是一个重复的问题，但我从画廊或相机捕捉图像没有问题。我在虚拟项目上创建了在这里检查我的代码它工作正常 但是当我在我的项目中使用相同的代码时，即使我没有收到任何错误，它也无法正常工作 一旦我开始活动以获得结果，它就会被取消，但我仍然可以从图库中看到图像，并且可以从相机中捕获图像。
当我检查 logcat 时，我发现以下警告不知道为什么会出现以及如何解决这个问题
W/NetworkConnectivityListener(2399): onReceived() called with CONNECTED and Intent act=android.net.conn.CONNECTIVITY_CHANGE flg=0x10000000 (has extras)
编辑：-- 添加代码
@Override
public boolean onOptionsItemSelected(MenuItem item)
switch (item.getItemId())
case R.id.camera:
//define the file-name to save photo taken by Camera activity
String fileName = "new-photo-name.jpg";
//create parameters for Intent with filename
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE, fileName);
values.put(MediaStore.Images.Media.DESCRIPTION,"Image capture by camera");
//imageUri is the current activity attribute, define and save it for later usage (also in onSaveInstanceState)
imageUri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
//create new Intent
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
startActivityForResult(intent, PICK_Camera_IMAGE);
return true;
case R.id.gallery:
try
Intent gintent = new Intent();
gintent.setType("image/*");
gintent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(
Intent.createChooser(gintent, "Select Picture"),
PICK_IMAGE);
catch (Exception e)
Toast.makeText(getApplicationContext(),
e.getMessage(),
Toast.LENGTH_LONG).show();
Log.e(e.getClass().getName(), e.getMessage(), e);
return true;
return false;
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
switch (requestCode)
case PICK_IMAGE:
if (resultCode == Activity.RESULT_OK)
Uri selectedImageUri = data.getData();
String filePath = null;
try
// OI FILE Manager
String filemanagerstring = selectedImageUri.getPath();
// MEDIA GALLERY
String selectedImagePath = getPath(selectedImageUri);
if (selectedImagePath != null)
filePath = selectedImagePath;
else if (filemanagerstring != null)
filePath = filemanagerstring;
else
Toast.makeText(getApplicationContext(), "Unknown path",
Toast.LENGTH_LONG).show();
Log.e("Bitmap", "Unknown path");
if (filePath != null)
decodeFile(filePath);
else
bitmap = null;
catch (Exception e)
Toast.makeText(getApplicationContext(), "Internal error",
Toast.LENGTH_LONG).show();
Log.e(e.getClass().getName(), e.getMessage(), e);
break;
case PICK_Camera_IMAGE:
if (resultCode == RESULT_OK)
//use imageUri here to access the image
Toast.makeText(this, "Picture was taken", Toast.LENGTH_SHORT).show();
Uri selectedImageUri = imageUri;
String filePath = null;
try
// OI FILE Manager
String filemanagerstring = selectedImageUri.getPath();
// MEDIA GALLERY
String selectedImagePath = getPath(selectedImageUri);
if (selectedImagePath != null)
filePath = selectedImagePath;
else if (filemanagerstring != null)
filePath = filemanagerstring;
else
Toast.makeText(getApplicationContext(), "Unknown path",
Toast.LENGTH_LONG).show();
Log.e("Bitmap", "Unknown path");
if (filePath != null)
decodeFile(filePath);
else
bitmap = null;
catch (Exception e)
Toast.makeText(getApplicationContext(), "Internal error",
Toast.LENGTH_LONG).show();
Log.e(e.getClass().getName(), e.getMessage(), e);
else if (resultCode == RESULT_CANCELED)
Toast.makeText(this, "Picture was not taken", Toast.LENGTH_SHORT).show();
else
Toast.makeText(this, "Picture was not taken", Toast.LENGTH_SHORT).show();
break;
谢谢
【问题讨论】：
以下问题应该对你有帮助...***.com/questions/9106486/… 【参考方案1】：看看我的项目LinderdaumEngineActivity.java中的Linderdaum Engine：
从相机捕捉图像：
public void CapturePhoto( String FileName )
try
File f = new File(FileName);
if ( f.exists() && f.canWrite() ) f.delete();
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT,Uri.fromFile(f));
intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
startActivityForResult(intent, CAPTURE_IMAGE_CALLBACK);
catch ( ActivityNotFoundException e )
Log.e( TAG, "No camera: " + e );
catch ( Exception e )
Log.e( TAG, "Cannot make photo: " + e );
从图库中打开图片：
public static void OpenImage()
try
Intent intent = new Intent( Intent.ACTION_GET_CONTENT );
intent.setType( "image/*" );
startActivityForResult( intent, SELECT_PICTURE_CALLBACK );
catch ( ActivityNotFoundException e )
Log.e( TAG, "No gallery: " + e );
另外，不要忘记为您的清单添加权限：
<uses-feature android:name="android.hardware.camera" android:required="false"/>
<uses-permission android:name="android.permission.CAMERA" android:required="false"/>
【讨论】：
你有请检查您的 AndroidManifest，确保您拥有所有正确的权限。
【讨论】：
【参考方案3】：请参阅以上 android 7 的文件提供程序的官方文档
getUriForFile(Context, String, File) which returns a content:// URI. For
more recent apps targeting Android 7.0 (API level 24) and higher, passing a
file:// URI across a package boundary causes a FileUriExposedException.
Therefore, we now present a more generic way of storing images using a
FileProvider.
<application>
...
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.example.android.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths"></meta-data>
</provider>
...
Official doc
【讨论】：
以上是关于从android中的画廊和相机中捕获图像的主要内容，如果未能解决你的问题，请参考以下文章
将相机或画廊中的图像保存在 phonegap 的画布中，并在旋转和裁剪后保存
如何在特定的imageView上上传特定的图像点击来自android中的画廊和相机
如何仅在 Swift 中访问从相机拍摄的图像，就像 iOS 中的画廊一样？