當我將自定義內容提供程序用於相機意圖時，應該通過哪些Uri？

Question

我有實現自定義內容提供者。

而且我想用相機意圖

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

，但我不知道是什麼的URI來傳遞，所以我可以將結果圖像添加到內容提供商

onActivityResult返回時，我沒有空數據把額外的。

任何幫助？ 在此先感謝！

Answer 1

，但我不知道是什麼的URI來傳遞，所以我可以將結果圖像添加到內容提供商

傳遞一個Uri指向你想要的相機應用中存儲的照片。由於沒有人知道您的定製ContentProvider在openFile()或相關方法中所做的事情，因此我們無法給您更具體的建議。

在下面的活動，從this sample app，我使用FileProvider.getUriForFile()創建一個有效的Uri到FileProvider可以保存到所需的文件：

/*** 
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(); 
     } 
    } 
    } 
}