Android中更换头像功能的实现

点击头像实现更换头像，可以从相册里进行更换，也可以拍摄照片更换

运行效果图

点击从相册中选择,选择图片

点击从相册中选择

扫描二维码关注公众号，回复： 2882913 查看本文章

Activity中的代码，因为这是在我的项目中做的所以有些代码是没有必要的，在代码中写了注释，所以只需要从注释点击头像更换头像处看就好，

注意别忘了声明ImageButton按钮，Bitmap存放头像，path存放sd路径。

package com.bzu.fshiner.parttimejob.activity;

import android.app.AlertDialog;
import android.app.Fragment;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;

import com.bzu.fshiner.parttimejob.R;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import static android.app.Activity.RESULT_OK;

/**
 * Created by Administrator on 2017/5/17.
 */

public class PersonalFragment extends Fragment  {
    private LinearLayout LL01,LL02,LL03;
    private Context mContext;
    private ImageButton touxiang;
    private Bitmap head;// 头像Bitmap
    private static String path = "/sdcard/myHead/";// sd路径

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
        return inflater.inflate(R.layout.personal_fragment,container,false);
    }
    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.mContext = getActivity();
    }
    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        initView();
        //查看个人信息
        LL01.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent=new Intent(getActivity(),MorePersonActivity.class);
                startActivity(intent);
            }
        });
        //查看我的收藏
        LL02.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
               Intent intent=new Intent(getActivity(),CollectionActivity.class);
                startActivity(intent);
            }
        });
        //查看我发布的所有兼职
        LL03.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent=new Intent(getActivity(),MySendActivity.class);
                startActivity(intent);
            }
        });

        /*
        点击头像进行更换头像
         */
        touxiang.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                switch (v.getId()) {
                    case R.id.touxiang:// 更换头像
                        showTypeDialog();
                        break;
                }
            }
        });

    }
    private void initView() {
        LL01=(LinearLayout)getActivity().findViewById(R.id.LL01);
        LL02=(LinearLayout)getActivity().findViewById(R.id.LL02);
        LL03=(LinearLayout)getActivity().findViewById(R.id.LL03);

        touxiang = (ImageButton)getActivity().findViewById(R.id.touxiang);
        Bitmap bt = BitmapFactory.decodeFile(path + "head.jpg");// 从SD卡中找头像，转换成Bitmap
        if (bt != null) {
            @SuppressWarnings("deprecation")
            Drawable drawable = new BitmapDrawable(bt);// 转换成drawable
            touxiang.setImageDrawable(drawable);
        } else {
            /**
             * 如果SD里面没有则需要从服务器取头像，取回来的头像再保存在SD中
             *
             */
        }
    }
    private void showTypeDialog() {
        //显示对话框
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        final AlertDialog dialog = builder.create();
        View view = View.inflate(getActivity(), R.layout.dialog_select_photo, null);
        TextView tv_select_gallery = (TextView) view.findViewById(R.id.tv_select_gallery);
        TextView tv_select_camera = (TextView) view.findViewById(R.id.tv_select_camera);
        tv_select_gallery.setOnClickListener(new View.OnClickListener() {// 在相册中选取
            @Override
            public void onClick(View v) {
                Intent intent1 = new Intent(Intent.ACTION_PICK, null);
                //打开文件
                intent1.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");
                startActivityForResult(intent1, 1);
                dialog.dismiss();
            }
        });
        tv_select_camera.setOnClickListener(new View.OnClickListener() {// 调用照相机
            @Override
            public void onClick(View v) {
                Intent intent2 = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                intent2.putExtra(MediaStore.EXTRA_OUTPUT,
                        Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "head.jpg")));
                startActivityForResult(intent2, 2);// 采用ForResult打开
                dialog.dismiss();
            }
        });
        dialog.setView(view);
        dialog.show();
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case 1:
                if (resultCode == RESULT_OK) {
                    cropPhoto(data.getData());// 裁剪图片
                }

                break;
            case 2:
                if (resultCode == RESULT_OK) {
                    File temp = new File(Environment.getExternalStorageDirectory() + "/head.jpg");
                    cropPhoto(Uri.fromFile(temp));// 裁剪图片
                }

                break;
            case 3:
                if (data != null) {
                    Bundle extras = data.getExtras();
                    head = extras.getParcelable("data");
                    if (head != null) {
                        /**
                         * 上传服务器代码
                         */
                        setPicToView(head);// 保存在SD卡中
                        touxiang.setImageBitmap(head);// 用ImageButton显示出来
                    }
                }
                break;
            default:
                break;

        }
        super.onActivityResult(requestCode, resultCode, data);
    }

    /**
     * 调用系统的裁剪功能
     *
     * @param uri
     */
    public void cropPhoto(Uri uri) {
        Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setDataAndType(uri, "image/*");
        intent.putExtra("crop", "true");
        // aspectX aspectY 是宽高的比例
        intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);
        // outputX outputY 是裁剪图片宽高
        intent.putExtra("outputX", 250);
        intent.putExtra("outputY", 250);
        intent.putExtra("return-data", true);
        startActivityForResult(intent, 3);
    }

    private void setPicToView(Bitmap mBitmap) {
        String sdStatus = Environment.getExternalStorageState();
        if (!sdStatus.equals(Environment.MEDIA_MOUNTED)) { // 检测sd是否可用
            return;
        }
        FileOutputStream b = null;
        File file = new File(path);
        file.mkdirs();// 创建文件夹
        String fileName = path + "head.jpg";// 图片名字
        try {
            b = new FileOutputStream(fileName);
            mBitmap.compress(Bitmap.CompressFormat.JPEG, 100, b);// 把数据写入文件
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } finally {
            try {
                // 关闭流
                b.flush();
                b.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}

在主布局文件中只需要写一个ImageButton按钮就好

 <ImageButton
            android:id="@+id/touxiang"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="0dp"
            android:background="@drawable/person_default"
            android:layout_centerHorizontal="true"
            />

另外还需要写一个布局文件，取名为dialog_select_photo.xml，这个布局是点击图片按钮时弹出的选择框。

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingLeft="60dp"
    android:paddingRight="60dp">
    <TextView
        android:id="@+id/tv_select_gallery"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingTop="20dp"
        android:padding="20dp"
        android:gravity="center"
        android:text="从相册中选取" />
    <TextView
        android:layout_below="@id/tv_select_gallery"
        android:id="@+id/tv_select_camera"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:paddingBottom="20dp"
        android:gravity="center"
        android:text="拍摄照片" />
</RelativeLayout>