android 实现APP中改变头像图片

package com.example.studyapplication.fragment;import android.app.Activity;import android.app.AlertDialog;import android.content.Context;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.PorterDuff;import android.graphics.PorterDuffXfermode;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.support.v4.app.Fragment;import android.text.Spannable;import android.text.SpannableString;import android.text.Spanned;import android.text.method.LinkMovementMethod;import android.text.style.ForegroundColorSpan;import android.text.style.URLSpan;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.Button;import android.widget.ImageButton;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.TextView;import com.example.studyapplication.MainActivity;import com.example.studyapplication.R;import com.example.studyapplication.wode_Activity;import com.example.studyapplication.zhubanfangActivity;import com.example.studyapplication.zhuceActivity;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.lang.ref.WeakReference;import static android.app.Activity.RESULT_OK;public class WodeFragment extends Fragment implements View.OnClickListener {    private View mView;    private Context mAvtivity;    Button youhuiquan;    Button shoucang;    Button guanzhu;    ImageView shezhi;    ImageView xiaoxi;    TextView qiehuanweizhuban;   static   TextView denglu;    LinearLayout daifukuan;    LinearLayout daicanyu;    LinearLayout tuikuan;    LinearLayout  yiwancheng;    LinearLayout qingxiandenglu;    LinearLayout log;    LinearLayout quanbudingdan;    private Button LL01,LL02,LL03;    private Context mContext;    private ImageButton touxiang;    private Bitmap head;// 头像Bitmap    private static String path = "/sdcard/myHead/";// sd路径    Activity mActivity;    Uri uritempFile;    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {        mView = inflater.inflate(R.layout.wode_layout, null);        mActivity=this.getActivity();            //设置布局文件5888        return mView;    }    @Override    public void onCreate(@Nullable Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        this.mContext = getActivity();    }         /*        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=(Button)getActivity().findViewById(R.id.youhuiquan);        LL02=(Button) getActivity().findViewById(R.id.shoucang);        LL03=(Button)getActivity().findViewById(R.id.guanzhu);        touxiang = (ImageButton)getActivity().findViewById(R.id.touxiang);        Bitmap bt = BitmapFactory.decodeFile(path + "log.png");// 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/log.png");                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(), "log.png")));                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) {// 如果返回码是可以用的                    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) {                    Uri extras = data.getData();                    //head = extras.getParcelable("data");                    try {                        head=BitmapFactory.decodeStream(mActivity.getContentResolver().openInputStream(uritempFile));                    } catch (FileNotFoundException e) {                        e.printStackTrace();                    }                    if (head != null) {                        /**                         * 上传服务器代码                         */                        // 让刚才选择裁剪得到的图片显示在界面上                        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) {        if(uri== null){            Log.i("tag","The uri is not exist.");        }        Intent intent = new Intent("com.android.camera.action.CROP");        intent.setDataAndType(uri, "image/*.png");        //设置裁剪        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);        uritempFile = Uri.parse("file:///sdcard/temp.jpg");//重要，android4.0以上，本地地址前都加file://+/       // uritempFile=uri;        intent.putExtra(MediaStore.EXTRA_OUTPUT, uritempFile);        intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());        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 + "log.png";// 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();            }        }    }//生成圆角图片-------未使用    private Bitmap getRoundedCornerBitmap(Bitmap bitmap){        Bitmap roundBitMap = Bitmap.createBitmap(bitmap.getWidth(),bitmap.getHeight(), Bitmap.Config.ARGB_8888);        Canvas canvas =new Canvas(roundBitMap);        int color=0xff424242;        Paint paint=new Paint();        //设置圆形半径        int radius;        if( bitmap.getWidth()>bitmap.getHeight()){            radius=bitmap.getHeight()/2;        }else {            radius=bitmap.getWidth()/2;        }        //绘制圆形        paint.setAntiAlias(true);        canvas.drawARGB(0,0,0,0);        paint.setColor(color);        canvas.drawCircle(bitmap.getWidth()/2,bitmap.getHeight()/2,radius,paint);        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));        canvas.drawBitmap(bitmap,0,0,paint);        return  roundBitMap;    }}
注意：手机权限一定要设置，这个非常重要
AndroidManifest.xml：
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