Question

首先我知道这是一个重复的问题，但我没有从画廊或相机捕捉图像的问题。我创建了虚拟项目来检查我的代码，它工作正常但是当我在我的项目中使用相同的代码时在这里它甚至没有工作，即使我没有得到任何错误一旦我开始活动结果它就会被取消但我仍然可以看到来自画廊和图像的图像我可以从相机中捕捉图像。

当我检查logcat时，我发现以下警告不知道它为什么会出现＆amp;我怎么能解决这个问题

 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

Answer 1

查看我的项目Linderdaum Engine中的LinderdaumEngineActivity.java：

从相机中捕捉图像：

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"/>

Answer 2

请检查您的AndroidManifest，确保您拥有所有正确的权限。

Answer 3

有关上述android 7的信息，请参见文件提供商的官方文档

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

从画廊捕获图像＆amp;在android中的相机

3 个答案: