android APP中的头像转换问题

mainactivity:
package com.example.administrator.mycoupon;

import java.io.File;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends Activity {

protected static final int CHOOSE_PICTURE = 0;
protected static final int TAKE_PICTURE = 1;
private static final int CROP_SMALL_PICTURE = 2;
protected static Uri tempUri;
private ImageView iv_personal_icon;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button btn_change = (Button) findViewById(R.id.btn_change);
iv_personal_icon = (ImageView) findViewById(R.id.iv_personal_icon);
btn_change.setOnClickListener(new OnClickListener() {

@Override
public void onClick(View v) {
showChoosePicDialog();
}
});
}

/**
* 显示修改头像的对话框
*/
protected void showChoosePicDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("设置头像");
String[] items = { "选择本地照片", "拍照" };
builder.setNegativeButton("取消", null);
builder.setItems(items, new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
switch (which) {
case CHOOSE_PICTURE: // 选择本地照片
Intent openAlbumIntent = new Intent(
Intent.ACTION_PICK);
openAlbumIntent.setType("image/*");
startActivityForResult(openAlbumIntent, CHOOSE_PICTURE);
break;
case TAKE_PICTURE: // 拍照
Intent openCameraIntent = new Intent(
MediaStore.ACTION_IMAGE_CAPTURE);
tempUri = Uri.fromFile(new File(Environment
.getExternalStorageDirectory(), "image.jpg"));
// 指定照片保存路径（SD卡），image.jpg为一个临时文件，每次拍照后这个图片都会被替换
openCameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, tempUri);
startActivityForResult(openCameraIntent, TAKE_PICTURE);
break;
}
}
});
builder.create().show();
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) { // 如果返回码是可以用的
switch (requestCode) {
case TAKE_PICTURE:
startPhotoZoom(tempUri); // 开始对图片进行裁剪处理
break;
case CHOOSE_PICTURE:
startPhotoZoom(data.getData()); // 开始对图片进行裁剪处理
break;
case CROP_SMALL_PICTURE:
if (data != null) {
setImageToView(data); // 让刚才选择裁剪得到的图片显示在界面上
}
break;
}
}
}

/**
* 裁剪图片方法实现
*
* @param uri
*/
protected void startPhotoZoom(Uri uri) {
if (uri == null) {
Log.i("tag", "The uri is not exist.");
}
tempUri = uri;
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/*");
// 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", 150);
intent.putExtra("outputY", 150);
intent.putExtra("return-data", true);
startActivityForResult(intent, CROP_SMALL_PICTURE);
}

/**
* 保存裁剪之后的图片数据
*
* @param
*
* @param picdata
*/
protected void setImageToView(Intent data) {
Bundle extras = data.getExtras();
if (extras != null) {
Bitmap photo = extras.getParcelable("data");
photo = Utils.toRoundBitmap(photo, tempUri); // 这个时候的图片已经被处理成圆形的了
iv_personal_icon.setImageBitmap(photo);
uploadPic(photo);
}
}

private void uploadPic(Bitmap bitmap) {
// 上传至服务器
// ... 可以在这里把Bitmap转换成file，然后得到file的url，做文件上传操作
// 注意这里得到的图片已经是圆形图片了
// bitmap是没有做个圆形处理的，但已经被裁剪了

String imagePath = Utils.savePhoto(bitmap, Environment
.getExternalStorageDirectory().getAbsolutePath(), String
.valueOf(System.currentTimeMillis()));
Log.e("imagePath", imagePath+"");
if(imagePath != null){
// 拿着imagePath上传了
// ...
}
}
}

activity_main:
<?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"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center_horizontal"
android:orientation="vertical" >

<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#51CA65"
android:padding="30dp" >

<ImageView
android:id="@+id/iv_personal_icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:src="@drawable/default_personal_image" />
</RelativeLayout>

<Button
android:id="@+id/btn_change"
android:layout_marginTop="6dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="修改头像" >
</Button>

</LinearLayout>
</LinearLayout>

新建一个Java Class-Utils.java:
package com.example.administrator.mycoupon;

/**
* Created by Administrator on 2018/7/10.
*/

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

import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.net.Uri;

public class Utils {

/**
* Save image to the SD card
*
* @param photoBitmap
* @param photoName
* @param path
*/
public static String savePhoto(Bitmap photoBitmap, String path,
String photoName) {
String localPath =path ;
if (android.os.Environment.getExternalStorageState().equals(
android.os.Environment.MEDIA_MOUNTED)) {
File dir = new File(path);
if (!dir.exists()) {
dir.mkdirs();
}

File photoFile = new File(path, photoName + ".png");
FileOutputStream fileOutputStream =null ;
try {
fileOutputStream = new FileOutputStream(photoFile);
if (photoBitmap !=null ) {
if (photoBitmap.compress(Bitmap.CompressFormat.PNG, 100,
fileOutputStream)) { // 转换完成
localPath = photoFile.getPath();
fileOutputStream.flush();
}
}
} catch (FileNotFoundException e) {
photoFile.delete();
localPath = path;
e.printStackTrace();
} catch (IOException e) {
photoFile.delete();
localPath = path;
e.printStackTrace();
} finally {
try {
if (fileOutputStream !=null ) {
fileOutputStream.close();
fileOutputStream = null;
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
return localPath;
}

/**
* 转换图片成圆形
*
* @param bitmap 传入Bitmap对象
* @param tempUri
* @return
*/
public static Bitmap toRoundBitmap(Bitmap bitmap, Uri tempUri) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
float roundPx;
float left,top,right,bottom,dst_left,dst_top,dst_right,dst_bottom;
if (width <= height) {
roundPx = width / 2;
top = 0;
bottom = width;
left = 0;
right = width;
height = width;
dst_left = 0;
dst_top = 0;
dst_right = width;
dst_bottom = width;
} else {
roundPx = height / 2;
float clip = (width - height) / 2;
left = clip;
right = width - clip;
top = 0;
bottom = height;
width = height;
dst_left = 0;
dst_top = 0;
dst_right = height;
dst_bottom = height;
}
Bitmap output = Bitmap.createBitmap(width,
height, Config.ARGB_8888);
Canvas canvas = new Canvas(output);
final int color = 0xff424242;
final Paint paint = new Paint();
final Rect src = new Rect((int)left, (int)top, (int)right, (int)bottom);
final Rect dst = new Rect((int)dst_left, (int)dst_top, (int)dst_right, (int)dst_bottom);
final RectF rectF = new RectF(dst);
paint.setAntiAlias(true);
canvas.drawARGB(0, 0, 0, 0);
paint.setColor(color);
canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
canvas.drawBitmap(bitmap, src, dst, paint);
return output;
}
}