Android 相册选择照片或拍照获取图片系统6.0及7.0实现

6.0及6.0以上权限动态询问

 private static final int MY_PERMISSIONS_REQUEST_CALL_PHONE = 6; private static final int MY_PERMISSIONS_REQUEST_CALL_PHONE2 = 7; //手机拍照        camera.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                if (ContextCompat.checkSelfPermission(getApplicationContext(),                        Manifest.permission.CAMERA)                        != PackageManager.PERMISSION_GRANTED) {                    ActivityCompat.requestPermissions(ReviewActivity.this,                            new String[]{Manifest.permission.CAMERA},                            MY_PERMISSIONS_REQUEST_CALL_PHONE);                } else {                    photo();                    dialog.dismiss();                }            }        }); //从相册选择图片        photo.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                if (ContextCompat.checkSelfPermission(getApplicationContext(),                        Manifest.permission.WRITE_EXTERNAL_STORAGE)                        != PackageManager.PERMISSION_GRANTED) {                    ActivityCompat.requestPermissions(ReviewActivity.this,                            new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},                            MY_PERMISSIONS_REQUEST_CALL_PHONE2);                } else {                    int selectedMode;                    selectedMode = MultiImageSelectorActivity.MODE_MULTI;                    int maxNum = 9 - drr.size();                    Intent intent = new Intent(ReviewActivity.this,                             MultiImageSelectorActivity.class);                     // 是否显示拍摄图片                    intent.putExtra(MultiImageSelectorActivity.EXTRA_SHOW_CAMERA, false);                    // 最大可选择图片数量                    intent.putExtra(MultiImageSelectorActivity.EXTRA_SELECT_COUNT, maxNum);                    // 选择模式                    intent.putExtra(MultiImageSelectorActivity.EXTRA_SELECT_MODE, selectedMode);                    startActivityForResult(intent, RESULT_LOAD_IMAGE);                    dialog.dismiss();                }            }        }); /**     * 拍照方法代码     */    public void photo() {        try {            if (hasSdcard()) {                String sdcardState = Environment.getExternalStorageState();                String sdcardPathDir = Environment.getExternalStorageDirectory().getPath() + "/tempImage/";                File file = null;                if (Environment.MEDIA_MOUNTED.equals(sdcardState)) {                    // 有sd卡，是否有myImage文件夹                    File fileDir = new File(sdcardPathDir);                    if (!fileDir.exists()) {                        fileDir.mkdirs();                    }                    // 是否有headImg文件                    file = new File(sdcardPathDir + System.currentTimeMillis() + ".JPEG");                }                if (file != null) {                    path = file.getPath();                    photoUri = Uri.fromFile(file);                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {                        //通过FileProvider创建一个content类型的Uri                        photoUri = FileProvider.getUriForFile(ReviewActivity.this, "com.zuihou.drunkenmonkey.fileprovider", file);                    }                    Intent openCameraIntent = new Intent();                    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {                        openCameraIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); //添加这一句表示对目标应用临时授权该Uri所代表的文件                    }                    openCameraIntent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);                    openCameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);                    startActivityForResult(openCameraIntent, TAKE_PICTURE);                }            } else {                ToastUtil.showToast(getApplicationContext(), "设备没有SD卡！");            }        } catch (Exception e) {            e.printStackTrace();        }    }    /**     * 检查设备是否存在SDCard的工具方法     */    public static boolean hasSdcard() {        String state = Environment.getExternalStorageState();        return state.equals(Environment.MEDIA_MOUNTED);    }

这里有一句代码：

FileProvider.getUriForFile(ReviewActivity.this, "com.zuihou.drunkenmonkey.fileprovider", file);

在用Android 7.0版本时，调用相机拍照出现了异常 FileUriExposedException，就是在传递uri时出错 Android 7.0后又修改了文件权限，可以使用FileProvider解决

在项目res目录下创建xml文件夹

<?xml version="1.0" encoding="utf-8"?><paths>            <external-path        name="camera_photos"        path="" />paths>

在manifest.xml文件添加provider，相机，读写文件权限

  <provider            android:name="android.support.v4.content.FileProvider"   //固定值            android:authorities="com.zuihou.drunkenmonkey.fileprovider"  //前面为项目的包名，fileprovider固定            android:exported="false" //是否支持其它应用调用当前组件 ，要求为flase            android:grantUriPermissions="true">              <meta-data                android:name="android.support.FILE_PROVIDER_PATHS" //固定值                android:resource="@xml/file_paths" /> //在res目录下定义的filepaths.xml文件，名字可以自定义        </provider>

    <uses-permission android:name="android.permission.CAMERA"/>    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE">uses-permission>    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE">uses-permission>

获取权限后返回结果代码

 @Override    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {        if (requestCode == MY_PERMISSIONS_REQUEST_CALL_PHONE) {            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {                photo();            } else {                // Permission Denied                ToastUtil.showToast(ReviewActivity.this, "Permission Denied");            }        }        if (requestCode == MY_PERMISSIONS_REQUEST_CALL_PHONE2) {            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {                int selectedMode;                selectedMode = MultiImageSelectorActivity.MODE_MULTI;                int maxNum = 9 - drr.size();                Intent intent = new Intent(ReviewActivity.this, MultiImageSelectorActivity.class);                // 是否显示拍摄图片                intent.putExtra(MultiImageSelectorActivity.EXTRA_SHOW_CAMERA, false);                // 最大可选择图片数量                intent.putExtra(MultiImageSelectorActivity.EXTRA_SELECT_COUNT, maxNum);                // 选择模式                intent.putExtra(MultiImageSelectorActivity.EXTRA_SELECT_MODE, selectedMode);                startActivityForResult(intent, RESULT_LOAD_IMAGE);                dialog.dismiss();            } else {                // Permission Denied                ToastUtil.showToast(ReviewActivity.this, "Permission Denied");            }        }        super.onRequestPermissionsResult(requestCode, permissions, grantResults);    }

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