10

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&这里它不起作用即使我在开始活动结果时没有收到任何错误它被取消但我仍然可以从图库中查看图像，我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;
        }
}

谢谢你

4

3 回答 3

7

看看LinderdaumEngineActivity.java我的项目Linderdaum Engine：

从相机捕获图像：

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 );
    }
}

从图库中打开图像：

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"/>
于 2012-02-01T08:02:48.853 回答
4

请检查您的 AndroidManifest，确保您拥有所有正确的权限。

于 2012-02-01T09:02:29.287 回答
0

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>
...

官方文档

于 2020-08-03T13:36:11.603 回答