先配置好配置文件
AndroidManifest下
<!--安卓7.0及以上需配置provider -->
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.rulerbug.bug.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths_public" />
</provider>
可以看到引用了个文件,是xml下的,所以,新建xml文件夹
新建文件file_paths_public.xml
<paths>
<!--指定共享的文件夹范围-->
<external-path
name="external_storage_root"
path="." />
</paths>
申请拍照片权限,写入存储卡权限
public void requestTakePhoto() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
// 检查是否有存储和拍照权限
if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED
&& checkSelfPermission(Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED
) {
//有权限
takePhoto();
} else {
//没有权限,开始申请
requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA}, CAMERA_REQUEST_CODE);
}
}else {
takePhoto();
}
}
拍照
// 拍照
private void takePhoto() {
// 要保存的文件名
String time = new SimpleDateFormat("yyyyMMddHHmmss", Locale.CHINA).format(new Date());
String fileName = "photo_" + time;
// 创建一个文件夹
String path = Environment.getExternalStorageDirectory() + "/take_photo";
File file = new File(path);
if (!file.exists()) {
file.mkdirs();
}
// 要保存的图片文件
imgFile = new File(file, fileName + ".jpeg");
// 将file转换成uri
// 注意7.0及以上与之前获取的uri不一样了,返回的是provider路径
imgUri = getUriForFile(this, imgFile);
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// 添加Uri读取权限
intent.addFlags(Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION);
// 或者
grantUriPermission("com.demo.permition.requestpermitions", imgUri, Intent.FLAG_GRANT_READ_URI_PERMISSION);
// 添加图片保存位置
intent.putExtra(MediaStore.EXTRA_OUTPUT, imgUri);
startActivityForResult(intent, CAMERA_REQUEST_CODE);
}
// 从file中获取uri
// 7.0及以上使用的uri是contentProvider content://com.rain.takephotodemo.FileProvider/images/photo_20180824173621.jpg
// 6.0使用的uri为file:///storage/emulated/0/take_photo/photo_20180824171132.jpg
private static Uri getUriForFile(Context context, File file) {
if (context == null || file == null) {
throw new NullPointerException();
}
Uri uri;
if (Build.VERSION.SDK_INT >= 24) {
uri = FileProvider.getUriForFile(context.getApplicationContext(), "com.rulerbug.bug.fileprovider", file);
} else {
uri = Uri.fromFile(file);
}
return uri;
}
注意,这里的“com.rulerbug.bug.fileprovider”要和配置文件里的一样
申请打开相册
public void openGallery() {
if (ContextCompat.checkSelfPermission(MainActivity.this,
Manifest.permission.WRITE_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED) { //权限还没有授予,需要在这里写申请权限的代码
// 第二个参数是一个字符串数组,里面是你需要申请的权限 可以设置申请多个权限
// 最后一个参数是标志你这次申请的权限,该常量在onRequestPermissionsResult中使用到
ActivityCompat.requestPermissions(MainActivity.this,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
GALLERY_REQUEST_CODE);
} else { //权限已经被授予,在这里直接写要执行的相应方法即可
choosePhoto();
}
}
打开相册
private void choosePhoto() {
Intent intentToPickPic = new Intent(Intent.ACTION_PICK, null);
// 如果限制上传到服务器的图片类型时可以直接写如:"image/jpeg 、 image/png等的类型" 所有类型则写 "image/*"
intentToPickPic.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/jpeg");
startActivityForResult(intentToPickPic, GALLERY_REQUEST_CODE);
}
图片裁剪
// 图片裁剪
private void cropPhoto(Uri uri, boolean fromCapture) {
Intent intent = new Intent("com.android.camera.action.CROP"); //打开系统自带的裁剪图片的intent
// 注意一定要添加该项权限,否则会提示无法裁剪
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
intent.setDataAndType(uri, "image/*");
intent.putExtra("scale", true);
// 设置裁剪区域的宽高比例
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
// 设置裁剪区域的宽度和高度
intent.putExtra("outputX", 200);
intent.putExtra("outputY", 200);
// 取消人脸识别
intent.putExtra("noFaceDetection", true);
// 图片输出格式
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
// 若为false则表示不返回数据
intent.putExtra("return-data", false);
// 指定裁剪完成以后的图片所保存的位置,pic info显示有延时
// 从相册中选择,那么裁剪的图片保存在take_photo中
String time = new SimpleDateFormat("yyyyMMddHHmmss", Locale.CHINA).format(new Date());
String fileName = "photo_" + time;
File mCutFile = new File(Environment.getExternalStorageDirectory() + "/take_photo", fileName + ".jpeg");
if (!mCutFile.getParentFile().exists()) {
mCutFile.getParentFile().mkdirs();
}
file_path = mCutFile.getAbsolutePath();
mCutUri = Uri.fromFile(mCutFile);
intent.putExtra(MediaStore.EXTRA_OUTPUT, mCutUri);
Toast.makeText(this, "剪裁图片", Toast.LENGTH_SHORT).show();
// 以广播方式刷新系统相册,以便能够在相册中找到刚刚所拍摄和裁剪的照片
Intent intentBc = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
intentBc.setData(uri);
this.sendBroadcast(intentBc);
startActivityForResult(intent, REQUEST_CROP); //设置裁剪参数显示图片至ImageVie
}
回调
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
switch (requestCode) {
// 拍照并进行裁剪
case CAMERA_REQUEST_CODE:
cropPhoto(imgUri, true);
break;
// 裁剪后设置图片
case REQUEST_CROP:
mIv.setImageURI(mCutUri);
break;
// 打开图库获取图片并进行裁剪
case GALLERY_REQUEST_CODE:
cropPhoto(data.getData(), false);
break;
}
}
super.onActivityResult(requestCode, resultCode, data);
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == CAMERA_REQUEST_CODE) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
takePhoto();
} else {
Toast.makeText(this, "权限授予失败!", Toast.LENGTH_SHORT).show();
}
}
}
得到照片后不裁剪也是可以的,直接不调用cropPhoto就可以了
全部
package com.demo.permition.requestpermitions;
import android.Manifest;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.content.FileProvider;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.ImageView;
import android.widget.Toast;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
public class MainActivity extends AppCompatActivity {
private ImageView mIv;
// 拍照回传码
public final static int CAMERA_REQUEST_CODE = 100;
// 相册选择回传吗
public final static int GALLERY_REQUEST_CODE = 200;
//裁剪回传吗
private static final int REQUEST_CROP = 300;
private File imgFile;
private Uri imgUri;
private String file_path = "";
private Uri mCutUri;// 图片裁剪时返回的uri
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mIv = findViewById(R.id.iv);
requestTakePhoto();
// openGallery();
}
public void requestTakePhoto() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
// 检查是否有存储和拍照权限
if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED
&& checkSelfPermission(Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED
) {
//有权限
takePhoto();
} else {
//没有权限,开始申请
requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA}, CAMERA_REQUEST_CODE);
}
}else {
Log.e("1123","1111");
takePhoto();
}
}
// 拍照
private void takePhoto() {
// 要保存的文件名
String time = new SimpleDateFormat("yyyyMMddHHmmss", Locale.CHINA).format(new Date());
String fileName = "photo_" + time;
// 创建一个文件夹
String path = Environment.getExternalStorageDirectory() + "/take_photo";
File file = new File(path);
if (!file.exists()) {
file.mkdirs();
}
// 要保存的图片文件
imgFile = new File(file, fileName + ".jpeg");
// 将file转换成uri
// 注意7.0及以上与之前获取的uri不一样了,返回的是provider路径
imgUri = getUriForFile(this, imgFile);
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// 添加Uri读取权限
intent.addFlags(Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION);
// 或者
grantUriPermission("com.demo.permition.requestpermitions", imgUri, Intent.FLAG_GRANT_READ_URI_PERMISSION);
// 添加图片保存位置
intent.putExtra(MediaStore.EXTRA_OUTPUT, imgUri);
startActivityForResult(intent, CAMERA_REQUEST_CODE);
}
// 从file中获取uri
// 7.0及以上使用的uri是contentProvider content://com.rain.takephotodemo.FileProvider/images/photo_20180824173621.jpg
// 6.0使用的uri为file:///storage/emulated/0/take_photo/photo_20180824171132.jpg
private static Uri getUriForFile(Context context, File file) {
if (context == null || file == null) {
throw new NullPointerException();
}
Uri uri;
if (Build.VERSION.SDK_INT >= 24) {
uri = FileProvider.getUriForFile(context.getApplicationContext(), "com.rulerbug.bug.fileprovider", file);
} else {
uri = Uri.fromFile(file);
}
return uri;
}
public void openGallery() {
if (ContextCompat.checkSelfPermission(MainActivity.this,
Manifest.permission.WRITE_EXTERNAL_STORAGE)
!= PackageManager.PERMISSION_GRANTED) { //权限还没有授予,需要在这里写申请权限的代码
// 第二个参数是一个字符串数组,里面是你需要申请的权限 可以设置申请多个权限
// 最后一个参数是标志你这次申请的权限,该常量在onRequestPermissionsResult中使用到
ActivityCompat.requestPermissions(MainActivity.this,
new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},
GALLERY_REQUEST_CODE);
} else { //权限已经被授予,在这里直接写要执行的相应方法即可
choosePhoto();
}
}
private void choosePhoto() {
Intent intentToPickPic = new Intent(Intent.ACTION_PICK, null);
// 如果限制上传到服务器的图片类型时可以直接写如:"image/jpeg 、 image/png等的类型" 所有类型则写 "image/*"
intentToPickPic.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/jpeg");
startActivityForResult(intentToPickPic, GALLERY_REQUEST_CODE);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
if (resultCode == RESULT_OK) {
switch (requestCode) {
// 拍照并进行裁剪
case CAMERA_REQUEST_CODE:
cropPhoto(imgUri, true);
break;
// 裁剪后设置图片
case REQUEST_CROP:
mIv.setImageURI(mCutUri);
break;
// 打开图库获取图片并进行裁剪
case GALLERY_REQUEST_CODE:
cropPhoto(data.getData(), false);
break;
}
}
super.onActivityResult(requestCode, resultCode, data);
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
if (requestCode == CAMERA_REQUEST_CODE) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
takePhoto();
} else {
Toast.makeText(this, "权限授予失败!", Toast.LENGTH_SHORT).show();
}
}
}
// 图片裁剪
private void cropPhoto(Uri uri, boolean fromCapture) {
Intent intent = new Intent("com.android.camera.action.CROP"); //打开系统自带的裁剪图片的intent
// 注意一定要添加该项权限,否则会提示无法裁剪
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
intent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
intent.setDataAndType(uri, "image/*");
intent.putExtra("scale", true);
// 设置裁剪区域的宽高比例
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
// 设置裁剪区域的宽度和高度
intent.putExtra("outputX", 200);
intent.putExtra("outputY", 200);
// 取消人脸识别
intent.putExtra("noFaceDetection", true);
// 图片输出格式
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
// 若为false则表示不返回数据
intent.putExtra("return-data", false);
// 指定裁剪完成以后的图片所保存的位置,pic info显示有延时
// 从相册中选择,那么裁剪的图片保存在take_photo中
String time = new SimpleDateFormat("yyyyMMddHHmmss", Locale.CHINA).format(new Date());
String fileName = "photo_" + time;
File mCutFile = new File(Environment.getExternalStorageDirectory() + "/take_photo", fileName + ".jpeg");
if (!mCutFile.getParentFile().exists()) {
mCutFile.getParentFile().mkdirs();
}
file_path = mCutFile.getAbsolutePath();
mCutUri = Uri.fromFile(mCutFile);
intent.putExtra(MediaStore.EXTRA_OUTPUT, mCutUri);
Toast.makeText(this, "剪裁图片", Toast.LENGTH_SHORT).show();
// 以广播方式刷新系统相册,以便能够在相册中找到刚刚所拍摄和裁剪的照片
Intent intentBc = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
intentBc.setData(uri);
this.sendBroadcast(intentBc);
startActivityForResult(intent, REQUEST_CROP); //设置裁剪参数显示图片至ImageVie
}
}