Welchen Uri sollte ich weitergeben, wenn ich einen benutzerdefinierten Inhaltsanbieter für die Kamera verwende?

Question

Ich habe benutzerdefinierte Content Provider implementiert.

Und ich will die Kamera Absicht

Intent intent= new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
intent.putExtra(MediaStore.EXTRA_OUTPUT, uri); 
startActivityForResult(intent, requestCode); 

verwenden, aber ich weiß nicht, was uri so passieren ich das Ergebnisbild

an den Inhaltsanbieter hinzufügen können onActivityResult Null-Daten zurückgibt, wenn ich nicht extra legen.

Irgendwelche Hilfe? Vielen Dank im Voraus!

Answer 1

, aber ich weiß nicht, was uri so passieren i

Pass eine Uri das Ergebnisbild an den Inhaltsanbieter hinzufügen zeigt auf, wo Sie die Kamera-App soll das Foto speichern. Da niemand weiß, was Ihre benutzerdefinierte ContentProvider in openFile() oder verwandten Methoden macht, können wir Ihnen keinen spezifischeren Rat geben.

Im folgenden Aktivität von this sample app, ich FileProvider.getUriForFile() bin mit einer gültigen Uri zu schaffen, in die FileProvider auf die gewünschte Datei speichern:

/*** 
Copyright (c) 2008-2017 CommonsWare, LLC 
Licensed under the Apache License, Version 2.0 (the "License"); you may not 
use this file except in compliance with the License. You may obtain a copy 
of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required 
by applicable law or agreed to in writing, software distributed under the 
License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS 
OF ANY KIND, either express or implied. See the License for the specific 
language governing permissions and limitations under the License. 

Covered in detail in the book _The Busy Coder's Guide to Android Development_ 
https://commonsware.com/Android 
*/ 

package com.commonsware.android.camcon; 

import android.Manifest; 
import android.app.Activity; 
import android.content.ActivityNotFoundException; 
import android.content.ClipData; 
import android.content.Intent; 
import android.content.pm.PackageManager; 
import android.content.pm.ResolveInfo; 
import android.net.Uri; 
import android.os.Build; 
import android.os.Bundle; 
import android.provider.MediaStore; 
import android.support.v4.content.FileProvider; 
import android.widget.Toast; 
import java.io.File; 
import java.util.List; 

public class MainActivity extends Activity { 
    private static final String EXTRA_FILENAME= 
    "com.commonsware.android.camcon.EXTRA_FILENAME"; 
    private static final String FILENAME="CameraContentDemo.jpeg"; 
    private static final int CONTENT_REQUEST=1337; 
    private static final String AUTHORITY= 
    BuildConfig.APPLICATION_ID+".provider"; 
    private static final String PHOTOS="photos"; 
    private File output=null; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    if (savedInstanceState==null) { 
     output=new File(new File(getFilesDir(), PHOTOS), FILENAME); 

     if (output.exists()) { 
     output.delete(); 
     } 
     else { 
     output.getParentFile().mkdirs(); 
     } 

     Intent i=new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
     Uri outputUri=FileProvider.getUriForFile(this, AUTHORITY, output); 

     i.putExtra(MediaStore.EXTRA_OUTPUT, outputUri); 

     if (Build.VERSION.SDK_INT>=Build.VERSION_CODES.LOLLIPOP) { 
     i.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION); 
     } 
     else if (Build.VERSION.SDK_INT>=Build.VERSION_CODES.JELLY_BEAN) { 
     ClipData clip= 
      ClipData.newUri(getContentResolver(), "A photo", outputUri); 

     i.setClipData(clip); 
     i.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION); 
     } 
     else { 
     List<ResolveInfo> resInfoList= 
      getPackageManager() 
      .queryIntentActivities(i, PackageManager.MATCH_DEFAULT_ONLY); 

     for (ResolveInfo resolveInfo : resInfoList) { 
      String packageName = resolveInfo.activityInfo.packageName; 
      grantUriPermission(packageName, outputUri, 
      Intent.FLAG_GRANT_WRITE_URI_PERMISSION); 
     } 
     } 

     try { 
     startActivityForResult(i, CONTENT_REQUEST); 
     } 
     catch (ActivityNotFoundException e) { 
     Toast.makeText(this, R.string.msg_no_camera, Toast.LENGTH_LONG).show(); 
     finish(); 
     } 
    } 
    else { 
     output=(File)savedInstanceState.getSerializable(EXTRA_FILENAME); 
    } 
    } 

    @Override 
    protected void onSaveInstanceState(Bundle outState) { 
    super.onSaveInstanceState(outState); 

    outState.putSerializable(EXTRA_FILENAME, output); 
    } 

    @Override 
    protected void onActivityResult(int requestCode, int resultCode, 
            Intent data) { 
    if (requestCode == CONTENT_REQUEST) { 
     if (resultCode == RESULT_OK) { 
     Intent i=new Intent(Intent.ACTION_VIEW); 
     Uri outputUri=FileProvider.getUriForFile(this, AUTHORITY, output); 

     i.setDataAndType(outputUri, "image/jpeg"); 
     i.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); 

     try { 
      startActivity(i); 
     } 
     catch (ActivityNotFoundException e) { 
      Toast.makeText(this, R.string.msg_no_viewer, Toast.LENGTH_LONG).show(); 
     } 

     finish(); 
     } 
    } 
    } 
}