Android调用系统拍照、系统相册、剪裁.zip

#### Android手机拍照、剪裁，并非那么简单 简书地址：[我的简书--T9的第三个三角](http://www.jianshu.com/u/46cb5df3d852） - **前言** 项目中，基本都有用户自定义头像或自定义背景的功能，实现方法一般都是调用系统相机--拍照，或者系统相册--选择照片，然后进行剪裁，最终设为头像或背景。 而在Android6.0之后，需要动态获取权限，而且Android7.0之后，无法直接根据拍照返回的URI拿到图片，这是因为从安卓7.0开始，直接使用本地真实路径被认为是不安全的，会抛出FileUriExposedExCeption异常，本文就是基于这个功能去针对Android7.0进行操作。 废话不多说，先把基本的页面建立，先来布局。 - **布局** ``` <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/transparent_black_80" android:orientation="vertical"> <RelativeLayout android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="50dp" android:background="@color/black" android:visibility="visible"> <TextView android:id="@+id/tv_camera" android:layout_width="wrap_content" android:layout_height="match_parent" android:gravity="center" android:padding="10dp" android:text="@string/camera" android:textColor="@color/white" android:textSize="18sp" /> <TextView android:id="@+id/tv_picture" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:gravity="center" android:padding="10dp" android:text="@string/picture" android:textColor="@color/white" android:textSize="18sp" /> <TextView android:id="@+id/tv_done" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:gravity="center" android:padding="10dp" android:text="@string/done" android:textColor="@color/white" android:textSize="18sp" /> </RelativeLayout> <RelativeLayout android:id="@+id/rl_camera" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:background="@color/black"> <com.isseiaoki.simplecropview.CropImageView xmlns:custom="http://schemas.android.com/apk/res-auto" android:id="@+id/iv_wallpaper" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_weight="1" custom:scv_crop_mode="fit_image" custom:scv_frame_color="@color/white" custom:scv_frame_stroke_weight="3dp" custom:scv_guide_color="@color/white" custom:scv_guide_show_mode="show_on_touch" custom:scv_guide_stroke_weight="1dp" custom:scv_handle_color="@color/white" custom:scv_handle_show_mode="show_always" custom:scv_handle_size="8dp" custom:scv_min_frame_size="100dp" custom:scv_overlay_color="@color/down_fragment_alpha" /> </RelativeLayout> <LinearLayout android:id="@+id/ll_contral" android:layout_width="match_parent" android:layout_height="90dp" android:background="@color/white" android:orientation="horizontal" android:paddingBottom="30dp" android:paddingLeft="30dp" android:paddingRight="30dp" android:paddingTop="20dp" android:visibility="visible"> <TextView android:id="@+id/tv_reset" android:layout_width="0dp" android:layout_height="40dp" android:layout_marginRight="14dp" android:layout_weight="2" android:background="@drawable/reset_selector" android:gravity="center" android:text="Reset" android:textColor="@color/white" /> <ImageView android:id="@+id/left_rotate" android:layout_width="0dp" android:layout_height="40dp" android:layout_marginRight="14dp" android:layout_weight="1" android:background="@drawable/wallpaper_selector" android:src="@drawable/rotate_left" /> <ImageView android:id="@+id/right_rotate" android:layout_width="0dp" android:layout_height="40dp" android:layout_marginRight="14dp" android:layout_weight="1" android:background="@drawable/wallpaper_selector" android:src="@drawable/rotate_right" /> <ImageView android:id="@+id/up_reversal" android:layout_width="0dp" android:layout_height="40dp" android:layout_marginRight="14dp" android:layout_weight="1" android:background="@drawable/wallpaper_selector" android:src="@drawable/reversal_up" /> <ImageView android:id="@+id/left_reversal" android:layout_width="0dp" android:layout_height="40dp" android:layout_weight="1" android:background="@drawable/wallpaper_selector" android:src="@drawable/reversal_left" /> </LinearLayout> </LinearLayout>```  布局很简单，点击Camera、Picture、Done，分别调用手机拍照、调用系统相册照片、完成操作。 - **调用相机拍照** Android6.0之前，调用系统拍照，只需要在AndroidManifest.xml声明 <uses-permission android:name="android.permission.CAMERA" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> 权限，而在6.0以后，不仅需要声明，更需要运行时申请权限，先来调用相机拍照。 1.初始化控件，使用ButterKnife，这个简直傻瓜式的完成 ``` @BindView(R.id.tv_camera) TextView tvCamera; @BindView(R.id.tv_picture) TextView tvPicture; @BindView(R.id.tv_done) TextView tvDone; @BindView(R.id.toolbar) RelativeLayout toolbar; @BindView(R.id.iv_wallpaper) CropImageView ivWallpaper; @BindView(R.id.rl_camera) RelativeLayout rlCamera; @BindView(R.id.tv_reset) TextView tvReset; @BindView(R.id.left_rotate) ImageView leftRotate; @BindView(R.id.right_rotate) ImageView rightRotate; @BindView(R.id.up_reversal) ImageView upReversal; @BindView(R.id.left_reversal) ImageView leftReversal; @BindView(R.id.ll_contral) LinearLayout llContral; private static final int CAMERA_REQUEST_CODE = 1; private static final int REQUEST_CAPTURE = 2; private static final int REQUEST_PICTURE = 5; private static final int REVERSAL_LEFT = 3; private static final int REVERSAL_UP = 4; private Uri imageUri; private Uri localUri = null;``` 2.点击拍照： ``` tvCamera.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { checkPremission(); //检查权限 } }); private void checkPremission() { final String permission = Manifest.permission.CAMERA; //相机权限 final String permission1 = Manifest.permission.WRITE_EXTERNAL_STORAGE; //写入数据权限 if (ContextCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED