Android 拍照功能

启动相机

           File file = new File(getExternalCacheDir(), "output_image.jpg");     //设置文件名称，文件夹
                if (file.exists()) {
                    file.delete();
                }
                try {
                    file.createNewFile();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (Build.VERSION.SDK_INT >= 24) {
                    imageUri = FileProvider.getUriForFile(TakePhoto.this, "com.example" +
                            ".fileprovider", file);
                } else {
                    imageUri = Uri.fromFile(file);
                }
                Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
                intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri);
                startActivityForResult(intent,1);

拍照后处理返回结果

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case 1:
                if (resultCode == RESULT_OK) {
                    try {
                        Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver()
                                .openInputStream(imageUri));
                        picture.setImageBitmap(bitmap);
                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    }
                }
        }
    }

内容提供器实现分享

        <provider
            android:authorities="com.example.fileprovoder"
            android:name="android.support.v4.content.FileProvider" //属性值固定
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"  
                android:resource="@xml/file_paths"/>
        provider>

配置文件分享路径

<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path
        name="my_images"
        path=""/>    //空值代表整个sd卡进行分享
paths>