Android 7.0 之拍照与图片裁剪适配

   <p>在Android 7.0以上，在相机拍照和图片裁剪上，可能会碰到以下一些错误：</p>    <pre>  <code class="language-php">Process: com.yuyh.imgsel, PID: 22995    // 错误1  android.os.FileUriExposedException: file:///storage/emulated/0/Android/data/com.yuyh.imgsel/cache/1486438962645.jpg exposed beyond app through ClipData.Item.getUri()    // 错误2  android.os.FileUriExposedException: file:///storage/emulated/0/DCIM/RxGalleryFinal/IMG_20161018180127.jpg exposed beyond app through Intent.getData()</code></pre>    <p>主要是由于在Android 7.0以后，用了Content Uri 替换了原本的File Uri，故在targetSdkVersion=24的时候，部分 “`Uri.fromFile()“` 方法就不适用了。 **File Uri 与 Content Uri 的区别** - File Uri 对应的是文件本身的存储路径 - Content Uri 对应的是文件在Content Provider的路径 所以在android 7.0 以上，我们就需要将File Uri转换为 Content Uri。具体转换方法如下：</p>    <pre>  <code class="language-php">/**   * 转换 content:// uri   *    * @param imageFile   * @return   */  public Uri getImageContentUri(File imageFile) {      String filePath = imageFile.getAbsolutePath();      Cursor cursor = getContentResolver().query(              MediaStore.Images.Media.EXTERNAL_CONTENT_URI,              new String[] { MediaStore.Images.Media._ID },              MediaStore.Images.Media.DATA + "=? ",              new String[] { filePath }, null);        if (cursor != null && cursor.moveToFirst()) {          int id = cursor.getInt(cursor                  .getColumnIndex(MediaStore.MediaColumns._ID));          Uri baseUri = Uri.parse("content://media/external/images/media");          return Uri.withAppendedPath(baseUri, "" + id);      } else {          if (imageFile.exists()) {              ContentValues values = new ContentValues();              values.put(MediaStore.Images.Media.DATA, filePath);              return getContentResolver().insert(                      MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);          } else {              return null;          }      }  }</code></pre>    <p>那么，我们在裁剪的时候，应该如下调用：</p>    <pre>  <code class="language-php">private void crop(String imagePath) {      File file = new File("xxx.jpg");      cropImagePath = file.getAbsolutePath();        Intent intent = new Intent("com.android.camera.action.CROP");      intent.setDataAndType(getImageContentUri(new File(imagePath)), "image/*");      intent.putExtra("crop", "true");      intent.putExtra("aspectX", config.aspectX);      intent.putExtra("aspectY", config.aspectY);      intent.putExtra("outputX", config.outputX);      intent.putExtra("outputY", config.outputY);      intent.putExtra("scale", true);      intent.putExtra("return-data", false);      intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(file));      intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());      intent.putExtra("noFaceDetection", true);      startActivityForResult(intent, IMAGE_CROP_CODE);  }</code></pre>    <p>这样就解决了裁剪的问题，但是！！拍照的时候就会出现以下错误：</p>    <pre>  <code class="language-php">Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);  if (cameraIntent.resolveActivity(getActivity().getPackageManager()) != null) {      tempFile = new File(FileUtils.createRootPath(getActivity()) + "/" + System.currentTimeMillis() + ".jpg");      LogUtils.e(tempFile.getAbsolutePath());      FileUtils.createFile(tempFile);      cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(tempFile));      startActivityForResult(cameraIntent, REQUEST_CAMERA);  }</code></pre>    <pre>  <code class="language-php">android.os.FileUriExposedException: file:///storage/emulated/0/Android/data/com.yuyh.imgsel/cache/1486438962645.jpg exposed beyond app through ClipData.Item.getUri()</code></pre>    <p>这是因为拍照存储的文件，也需要以Content Uri的形式，故采用以下办法解决：</p>    <h3>Step.1</h3>    <p>修改AndroidManifest.xml</p>    <pre>  <code class="language-php"><application      ...>        <provider          android:name="android.support.v4.content.FileProvider"          android:authorities="{替换为你的包名}.provider"          android:exported="false"          android:grantUriPermissions="true">          <meta-data              android:name="android.support.FILE_PROVIDER_PATHS"              android:resource="@xml/provider_paths"/>      </provider>  </application></code></pre>    <h3>Step.2</h3>    <p>在res/xml/下新建provider_paths.xml文件</p>    <pre>  <code class="language-php"><?xml version="1.0" encoding="utf-8"?>  <paths xmlns:android="http://schemas.android.com/apk/res/android">      <external-path name="external_files" path="."/>  </paths></code></pre>    <h3>Step.3</h3>    <p>修改拍照时的参数</p>    <pre>  <code class="language-php">cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, FileProvider.getUriForFile(getActivity(),BuildConfig.APPLICATION_ID + ".provider", tempFile)); //Uri.fromFile(tempFile)</code></pre>    <p>搞定！</p>    <p> </p>    <p>来自：http://blog.csdn.net/yyh352091626/article/details/54908624</p>    <p> </p>