Android调用相机、相册上传头像并裁剪

Android7.0之后调用相机相册就要申请相应的权限，所以首先要先申请相机相册的使用权限

添加依赖：

  //动态权限申请库
    implementation 'pub.devrel:easypermissions:1.3.0'

在MainActivity中获取权限：

private String[] permissions = {Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE};
 //获取权限
    private void getPermission() {
        if (EasyPermissions.hasPermissions(this, permissions)) {
            //已经打开权限
            Toast.makeText(this, "已经申请相关权限", Toast.LENGTH_SHORT).show();
        } else {
            //没有打开相关权限、申请权限
            EasyPermissions.requestPermissions(this, "需要获取您的相册、照相使用权限", 1, permissions);
        }

    }


    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        //框架要求必须这么写
        EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);
    }


    //成功打开权限

    public void onPermissionsGranted(int requestCode, @NonNull List perms) {

        Toast.makeText(this, "相关权限获取成功", Toast.LENGTH_SHORT).show();
    }
    //用户未同意权限

    public void onPermissionsDenied(int requestCode, @NonNull List perms) {
        Toast.makeText(this, "请同意相关权限，否则功能无法使用", Toast.LENGTH_SHORT).show();
    }

然后在onCreate（）方法中 调用getPermission()来申请权限。

配置Manifest.xml：

首先是配置必要的权限

然后是添加provider

因为我的项目的sdk版本为29，因此会有不一样:

如果sdk版本是29的话，要在MainActivity中添加以下代码解决闪退问题：

 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
            StrictMode.setVmPolicy(builder.build());
        }

这里引用了一个资源文件file_paths，需要在res里面添加：

file_paths：

下面是完整代码：

activity_main.xml很简单，就一个图片：

MainActivity.java:

package com.example.uploadicon;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import android.Manifest;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.os.StrictMode;
import android.provider.MediaStore;
import android.view.View;
import android.widget.ImageView;
import android.widget.Toast;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.List;

import pub.devrel.easypermissions.EasyPermissions;

public class MainActivity extends AppCompatActivity {
    private String[] permissions = {Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE};
    private ImageView iv_icon;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        getPermission();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
            StrictMode.setVmPolicy(builder.build());
        }
        iv_icon = findViewById(R.id.iv_icon);
        iv_icon.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                showListDialog();
            }
        });
    }


    //获取权限
    private void getPermission() {
        if (EasyPermissions.hasPermissions(this, permissions)) {
            //已经打开权限
            Toast.makeText(this, "已经申请相关权限", Toast.LENGTH_SHORT).show();
        } else {
            //没有打开相关权限、申请权限
            EasyPermissions.requestPermissions(this, "需要获取您的相册、照相使用权限", 1, permissions);
        }

    }


    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        //框架要求必须这么写
        EasyPermissions.onRequestPermissionsResult(requestCode, permissions, grantResults, this);
    }


    //成功打开权限

    public void onPermissionsGranted(int requestCode, @NonNull List perms) {

        Toast.makeText(this, "相关权限获取成功", Toast.LENGTH_SHORT).show();
    }
    //用户未同意权限

    public void onPermissionsDenied(int requestCode, @NonNull List perms) {
        Toast.makeText(this, "请同意相关权限，否则功能无法使用", Toast.LENGTH_SHORT).show();
    }


    private void showListDialog() {
        final String[] items = { "拍照","从相册中选择" };
        AlertDialog.Builder listDialog =
                new AlertDialog.Builder(this);
        listDialog.setTitle("更改头像");
        listDialog.setItems(items, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                // which 下标从0开始
                // ...To-do

                switch (which){
                    case 0:
                        selectCamera();
                        break;

                    case 1:
                        selectPhoto();
                        break;
                }

            }
        });
        listDialog.show();
    }



    private static final int GET_BACKGROUND_FROM_CAPTURE_RESOULT = 1;
    private static final int RESULT_REQUEST_CODE = 2;
    private static final int TAKE_PHOTO =3;
    private Uri photoUri;   //相机拍照返回图片路径
    private File outputImage;

    //选择相机
    private void selectCamera(){

        //创建file对象，用于存储拍照后的图片，这也是拍照成功后的照片路径
        outputImage = new File(this.getExternalCacheDir(),"camera_photos.jpg");
        try {
            //判断文件是否存在，存在删除，不存在创建
            if (outputImage.exists()){
                outputImage.delete();
            }
            outputImage.createNewFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
        photoUri = Uri.fromFile(outputImage);

        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);
        startActivityForResult(intent, TAKE_PHOTO);

    }


    public static final String STR_IMAGE = "image/*";
    //选择相册
    private void selectPhoto(){

        Intent intent = new Intent(Intent.ACTION_PICK, null);
        intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, STR_IMAGE);
        startActivityForResult(intent, GET_BACKGROUND_FROM_CAPTURE_RESOULT);


    }


    private Uri cropImgUri;

    //裁剪图片
    public void cropRawPhoto(Uri uri) {
        //创建file文件，用于存储剪裁后的照片
        File cropImage = new File(Environment.getExternalStorageDirectory(), "crop_image.jpg");
        String path = cropImage.getAbsolutePath();
        try {
            if (cropImage.exists()) {
                cropImage.delete();
            }
            cropImage.createNewFile();
        } catch (IOException e) {
            e.printStackTrace();
        }
        cropImgUri = Uri.fromFile(cropImage);
        Intent intent = new Intent("com.android.camera.action.CROP");
//设置源地址uri
        intent.setDataAndType(photoUri, "image/*");
        intent.putExtra("crop", "true");
        intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);
        intent.putExtra("outputX", 200);
        intent.putExtra("outputY", 200);
        intent.putExtra("scale", true);
//设置目的地址uri
        intent.putExtra(MediaStore.EXTRA_OUTPUT, cropImgUri);
//设置图片格式
        intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
        intent.putExtra("return-data", false);
        intent.putExtra("noFaceDetection", true); // no face detection
        startActivityForResult(intent, RESULT_REQUEST_CODE);
    }


    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        if (resultCode != RESULT_OK) return;

        switch (requestCode){

            case GET_BACKGROUND_FROM_CAPTURE_RESOULT:   //相册返回
                photoUri = data.getData();
                cropRawPhoto(photoUri);
                break;


            case TAKE_PHOTO://   拍照返回
                cropRawPhoto(photoUri);
                break;

            case RESULT_REQUEST_CODE:   //裁剪完照片
                if (cropImgUri !=null) {
                    try {
                        Bitmap headImage = BitmapFactory.decodeStream(this.getContentResolver().openInputStream(cropImgUri));
                        iv_icon.setImageBitmap(headImage);

                        getFile(headImage); //把Bitmap转成File
//                        UpLoadIcon(getFile(headImage));   //上传图片文件到服务器


                    } catch (Exception e) {
                        e.printStackTrace();
                    }

                }else {
                    Toast.makeText(this,"cropImgUri为空！",Toast.LENGTH_SHORT).show();
                }
                break;

        }


        super.onActivityResult(requestCode, resultCode, data);


    }

    //把bitmap转成file
    public File getFile(Bitmap bitmap) {
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.JPEG, 50, baos);
        File file = new File(Environment.getExternalStorageDirectory() + "/temp.jpg");
        try {
            file.createNewFile();
            FileOutputStream fos = new FileOutputStream(file);
            InputStream is = new ByteArrayInputStream(baos.toByteArray());
            int x = 0;
            byte[] b = new byte[1024 * 100];
            while ((x = is.read(b)) != -1) {
                fos.write(b, 0, x);
            }
            fos.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return file;
    }



}

demo链接：https://download.csdn.net/download/qq_38306233/11655962

暂时没有git，有空再看下怎么上传git，没搞过不会哈哈哈哈哈。