Android实现点击更换头像

开发中经常会有这样的要求：用户可以点击头像更换成自己想要的头像。
思路是这样的：点击头像可以选择从相册中选择或者通过拍照完成设置。
这里也就需要两步来实现：一是从相册，而是拍照。
这里用到了一个开源的工具类：RoundImageView，该类实现了绘制圆形图片。以及用到了开源的文件创建类：FileUitlity，在文章得最后我将把两个类中的代码分享下。
为了实现主要功能，布局就一个RoundImageView 组件，该组件需要导入上面提到的RoundImageView 。

<com.inext.test.datatest.util.RoundImageView        android:id="@+id/roundImageView"        android:src="@mipmap/ic_launcher"        android:layout_width="60dp"        android:layout_height="60dp" />

Activity.class中的核心代码：

//获取组件RoundImageView roundImageView = (RoundImageView)findViewById(R.id.roundImageView);//绑定监听 roundImageView.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {            //PopupWindow----START-----这里开始到下面标记的地方是实现点击头像弹出PopupWindow，实现用户从PopupWindow中选择更换头像的方式                backgroundAlpha(0.3f);                View view = LayoutInflater.from(getBaseContext()).inflate(R.layout.popu_window,null);                final PopupWindow popupWindow = new PopupWindow(view, ActionBar.LayoutParams.WRAP_CONTENT,ActionBar.LayoutParams.WRAP_CONTENT, true);                popupWindow.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));                popupWindow.setOutsideTouchable(true);                popupWindow.setFocusable(true);                //获取屏幕宽度                DisplayMetrics dm = new DisplayMetrics();                getWindowManager().getDefaultDisplay().getMetrics(dm);                popupWindow.setWidth(dm.widthPixels);                popupWindow.setAnimationStyle(R.style.popuwindow);                //显示位置                popupWindow.showAtLocation(view, Gravity.BOTTOM, 0, 0);                popupWindow.setOnDismissListener(new poponDismissListener());                //PopupWindow-----END                //PopupWindow中对应的选择按钮                Button button = (Button)view.findViewById(R.id.take_photo);//通过拍照的方式                Button button1 = (Button)view.findViewById(R.id.all_photo);//通过相册的方式                Button button2 = (Button)view.findViewById(R.id.out);//取消按钮                button2.setOnClickListener(new View.OnClickListener() {                    @Override                    public void onClick(View v) {                        backgroundAlpha(1f);                        popupWindow.dismiss();                    }                });                button1.setOnClickListener(new View.OnClickListener() {                    @Override                    public void onClick(View v) {                        backgroundAlpha(1f);                        popupWindow.dismiss();                        //调用手机相册的方法,该方法在下面有具体实现                        allPhoto();                    }                });                button.setOnClickListener(new View.OnClickListener() {                    @Override                    public void onClick(View v) {                        backgroundAlpha(1f);                        popupWindow.dismiss();                        //调用手机照相机的方法,通过Intent调用系统相机完成拍照，并调用系统裁剪器裁剪照片                        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);                        //创建文件路径,头像保存的路径                        File file =FileUitlity.getInstance(getApplicationContext()).makeDir("head_image");                        //定义图片路径和名称                        path = file.getParent() + File.separatorChar + System.currentTimeMillis() + ".jpg";                        //保存图片到Intent中，并通过Intent将照片传给系统裁剪器                        intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(path)));                        //图片质量                        intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);                        //启动有返回的Intent，即返回裁剪好的图片到RoundImageView组件中显示                        startActivityForResult(intent, REQUEST_CODE);                    }                });            }        });    //该方法实现通过何种方式跟换图片        @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        //如果返回码不为-1，则表示不成功        if (resultCode != Activity.RESULT_OK){            return;        }        if (requestCode == ALL_PHOTO){            //调用相册            Cursor cursor = this.getContentResolver().query(data.getData(),                    new String[]{MediaStore.Images.Media.DATA},null,null,null);            //游标移到第一位，即从第一位开始读取            cursor.moveToFirst();            String path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));            cursor.close();            //调用系统裁剪            startPhoneZoom(Uri.fromFile(new File(path)));        }else if (requestCode == REQUEST_CODE){            //相机返回结果，调用系统裁剪            startPhoneZoom(Uri.fromFile(new File(path)));        }else if(requestCode == RESULT_PHOTO) {            //设置裁剪返回的位图            Bundle bundle = data.getExtras();            if (bundle!=null){                Bitmap bitmap = bundle.getParcelable("data");                //将裁剪后得到的位图在组件中显示                roundImageView.setImageBitmap(bitmap);            }        }    }    //调用系统裁剪的方法    private void startPhoneZoom(Uri uri){        Intent intent = new Intent("com.android.camera.action.CROP");        intent.setDataAndType(uri, "image/*");        //是否可裁剪        intent.putExtra("corp", "true");        //裁剪器高宽比        intent.putExtra("aspectY",1);        intent.putExtra("aspectX",1);        //设置裁剪框高宽        intent.putExtra("outputX",150);        intent.putExtra("outputY", 150);        //返回数据        intent.putExtra("return-data",true);        startActivityForResult(intent,RESULT_PHOTO);    }    //调用手机相册    private void allPhoto(){        Intent intent = new Intent(Intent.ACTION_PICK,MediaStore.Images.Media.EXTERNAL_CONTENT_URI);        startActivityForResult(intent,ALL_PHOTO);    }    /**     * 添加PopupWindow关闭的事件，主要是为了将背景透明度改回来     *     */    class poponDismissListener implements PopupWindow.OnDismissListener{        @Override        public void onDismiss() {            // TODO Auto-generated method stub            //Log.v("List_noteTypeActivity:", "我是关闭事件");            backgroundAlpha(1f);        }    }    /**     * 设置添加屏幕的背景透明度     * @param bgAlpha     */    public void backgroundAlpha(float bgAlpha)    {        WindowManager.LayoutParams lp = getWindow().getAttributes();        lp.alpha = bgAlpha; //0.0-1.0        getWindow().setAttributes(lp);    }

权限设置：

 <!-- 读取 --> <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /> <!-- 写入权限 --> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />  <!-- 创建与删除权限 --> <uses-permission android:name="android.permission.MOUNT_FORMAT_FILESYSTEMS" />

两个开源的工具类，这两个类可直接复制使用：
FileUitlity.java:

import android.content.Context;import android.os.Environment;import java.io.File;public class FileUitlity {    private static String ROOT_CACHE;    public static String ROOT_DIR="yt_xyt";    private static FileUitlity instance = null;    private FileUitlity() {    }    public static FileUitlity getInstance(Context context) {        if (instance == null) {            if (Environment.getExternalStorageState().equals(                    Environment.MEDIA_MOUNTED)) {                ROOT_CACHE = (Environment.getExternalStorageDirectory() + "/"                        + ROOT_DIR + "/");            } else {                ROOT_CACHE = (context.getFilesDir().getAbsolutePath() + "/"+ROOT_DIR+"/");            }            File dir = new File(ROOT_CACHE);            if (!dir.exists()) {                dir.mkdirs();            }            instance = new FileUitlity();        }        return instance;    }    public File makeDir(String dir) {        File fileDir = new File(ROOT_CACHE + dir);        if (fileDir.exists()) {            return fileDir;        } else {            fileDir.mkdirs();            return fileDir;        }    }   }

RoundImageView.java:

import android.content.Context;import android.graphics.Bitmap;import android.graphics.Bitmap.Config;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.PixelFormat;import android.graphics.PorterDuff.Mode;import android.graphics.PorterDuffXfermode;import android.graphics.Rect;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.util.AttributeSet;import android.widget.ImageView;public class RoundImageView extends ImageView {    public RoundImageView(Context context) {        super(context);        // TODO Auto-generated constructor stub    }    public RoundImageView(Context context, AttributeSet attrs) {        super(context, attrs);        // TODO Auto-generated constructor stub    }    public RoundImageView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        // TODO Auto-generated constructor stub    }    @Override    protected void onDraw(Canvas canvas) {        Drawable drawable = getDrawable();        if (drawable == null) {            return;        }        if (getWidth() == 0 || getHeight() == 0) {            return;        }        Bitmap b = null;        if(drawable instanceof BitmapDrawable){            b = ((BitmapDrawable) drawable).getBitmap();        }else if(drawable instanceof Drawable){            b = Bitmap.createBitmap(                           getWidth(),                           getHeight(),                           drawable.getOpacity() != PixelFormat.OPAQUE ? Config.ARGB_8888                        : Config.RGB_565);                        Canvas canvas1 = new Canvas(b);                           // canvas.setBitmap(bitmap);                           drawable.setBounds(0, 0, getWidth(),                           getHeight());                           drawable.draw(canvas1);          }        if (null == b) {            return;        }        Bitmap bitmap = b.copy(Config.ARGB_8888, true);        int w = getWidth(), h = getHeight();        Bitmap roundBitmap = getCroppedBitmap(bitmap, w);        canvas.drawBitmap(roundBitmap, 0, 0, null);    }    public static Bitmap getCroppedBitmap(Bitmap bmp, int radius) {        Bitmap sbmp;        if (bmp.getWidth() != radius || bmp.getHeight() != radius)            sbmp = Bitmap.createScaledBitmap(bmp, radius, radius, false);        else            sbmp = bmp;        Bitmap output = Bitmap.createBitmap(sbmp.getWidth(), sbmp.getHeight(),                Config.ARGB_8888);        Canvas canvas = new Canvas(output);        final int color = 0xffa19774;        final Paint paint = new Paint();        final Rect rect = new Rect(0, 0, sbmp.getWidth(), sbmp.getHeight());        paint.setAntiAlias(true);        paint.setFilterBitmap(true);        paint.setDither(true);        canvas.drawARGB(0, 0, 0, 0);        paint.setColor(Color.parseColor("#BAB399"));        canvas.drawCircle(sbmp.getWidth() / 2 + 0.7f,                sbmp.getHeight() / 2 + 0.7f, sbmp.getWidth() / 2 + 0.1f, paint);        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));        canvas.drawBitmap(sbmp, rect, rect, paint);        return output;    }}