效果例如以下：

看代码：

MainActivity类中：

package com.example.ceshidemo;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileOutputStream;import java.util.Calendar;import android.app.Activity;import android.app.AlertDialog;import android.content.Context;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.Toast;public class MainActivity extends Activity {	private static final int PHOTO_REQUEST_CAREMA = 1;	private static final int PHOTO_REQUEST_GALLERY = 2;	private static final int PHOTO_REQUEST_CUT = 3;	private static final String PHOTO_FILE_NAME = "temp_photo.jpg";	private File tempFile;	private CircleImageView headIcon;	@Override	public void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);		initView();	}	private void initView() {				headIcon = (CircleImageView) findViewById(R.id.headIcon);		headIcon.setOnClickListener(new OnClickListener() {						@Override			public void onClick(View v) {				// TODO Auto-generated method stub				changeHeadIcon();			}		});		changeTheme();		File file = new File(MainActivity.this.getFilesDir(), "_head_icon.jpg");		if (file.exists()) {			headIcon.setImageURI(Uri.fromFile(file));		}	}	private void changeTheme() {		Calendar c = Calendar.getInstance();		System.out.println(c.get(Calendar.HOUR_OF_DAY));		if (c.get(Calendar.HOUR_OF_DAY) < 18 && c.get(Calendar.HOUR_OF_DAY) >= 6) {			headIcon.setImageResource(R.drawable.ic_hehe);		} else {			headIcon.setImageResource(R.drawable.ic_launcher);		}	}	private void changeHeadIcon() {		final CharSequence[] items = { "相冊", "拍照" };		AlertDialog dlg = new AlertDialog.Builder(MainActivity.this)				.setTitle("选择图片")				.setItems(items, new DialogInterface.OnClickListener() {					public void onClick(DialogInterface dialog, int item) {						// 这里item是依据选择的方式。						if (item == 0) {							Intent intent = new Intent(Intent.ACTION_PICK);							intent.setType("image/*");							startActivityForResult(intent,									PHOTO_REQUEST_GALLERY);						} else {							Intent intent = new Intent(									MediaStore.ACTION_IMAGE_CAPTURE);							if (Environment.getExternalStorageState().equals(									Environment.MEDIA_MOUNTED)) {								tempFile = new File(Environment										.getExternalStorageDirectory(),										PHOTO_FILE_NAME);								Uri uri = Uri.fromFile(tempFile);								intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);								startActivityForResult(intent,										PHOTO_REQUEST_CAREMA);							} else {								Toast.makeText(MainActivity.this, "未找到存储卡，无法存储照片！",										Toast.LENGTH_SHORT).show();							}						}					}				}).create();		dlg.show();	}	@Override	public void onActivityResult(int requestCode, int resultCode, Intent data) {		super.onActivityResult(requestCode, resultCode, data);		if (requestCode == PHOTO_REQUEST_GALLERY) {			if (data != null) {				Uri uri = data.getData();				Log.e("图片路径？？", data.getData() + "");				crop(uri);			}		} else if (requestCode == PHOTO_REQUEST_CAREMA) {			if (Environment.getExternalStorageState().equals(					Environment.MEDIA_MOUNTED)) {				crop(Uri.fromFile(tempFile));			} else {				Toast.makeText(MainActivity.this, "未找到存储卡，无法存储照片！

", Toast.LENGTH_SHORT).show(); } } else if (requestCode == PHOTO_REQUEST_CUT) { if (data != null) { final Bitmap bitmap = data.getParcelableExtra("data"); headIcon.setImageBitmap(bitmap); // 保存图片到internal storage FileOutputStream outputStream; try { ByteArrayOutputStream out = new ByteArrayOutputStream(); bitmap.compress(Bitmap.CompressFormat.JPEG, 100, out); out.flush(); // out.close(); // final byte[] buffer = out.toByteArray(); // outputStream.write(buffer); outputStream = MainActivity.this.openFileOutput("_head_icon.jpg", Context.MODE_PRIVATE); out.writeTo(outputStream); out.close(); outputStream.close(); } catch (Exception e) { e.printStackTrace(); } } try { if (tempFile != null && tempFile.exists()) tempFile.delete(); } catch (Exception e) { e.printStackTrace(); } } } private void crop(Uri uri) { Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(uri, "image/*"); intent.putExtra("crop", "true"); intent.putExtra("aspectX", 1); intent.putExtra("aspectY", 1); intent.putExtra("outputX", 250); intent.putExtra("outputY", 250); intent.putExtra("outputFormat", "JPEG"); intent.putExtra("noFaceDetection", true); intent.putExtra("return-data", true); startActivityForResult(intent, PHOTO_REQUEST_CUT); } }

在这里自定了一个圆形的View：CircleImageView

package com.example.ceshidemo;import android.content.Context;import android.content.res.TypedArray;import android.graphics.Bitmap;import android.graphics.BitmapShader;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Matrix;import android.graphics.Paint;import android.graphics.RectF;import android.graphics.Shader;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.ColorDrawable;import android.graphics.drawable.Drawable;import android.net.Uri;import android.util.AttributeSet;import android.widget.ImageView;public class CircleImageView extends ImageView{    private static final ScaleType SCALE_TYPE = ScaleType.CENTER_CROP;    private static final Bitmap.Config BITMAP_CONFIG = Bitmap.Config.ARGB_8888;    private static final int COLORDRAWABLE_DIMENSION = 1;    private static final int DEFAULT_BORDER_WIDTH = 0;    private static final int DEFAULT_BORDER_COLOR = Color.BLACK;    private final RectF mDrawableRect = new RectF();    private final RectF mBorderRect = new RectF();    private final Matrix mShaderMatrix = new Matrix();    private final Paint mBitmapPaint = new Paint();    private final Paint mBorderPaint = new Paint();    private int mBorderColor = DEFAULT_BORDER_COLOR;    private int mBorderWidth = DEFAULT_BORDER_WIDTH;    private Bitmap mBitmap;    private BitmapShader mBitmapShader;    private int mBitmapWidth;    private int mBitmapHeight;    private float mDrawableRadius;    private float mBorderRadius;    private boolean mReady;    private boolean mSetupPending;    public CircleImageView(Context context) {        super(context);        init();    }    public CircleImageView(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public CircleImageView(Context context, AttributeSet attrs, int defStyle) {        super(context, attrs, defStyle);        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CircleImageView, defStyle, 0);        mBorderWidth = a.getDimensionPixelSize(R.styleable.CircleImageView_border_width, DEFAULT_BORDER_WIDTH);        mBorderColor = a.getColor(R.styleable.CircleImageView_border_color, DEFAULT_BORDER_COLOR);        a.recycle();        init();    }    private void init() {        super.setScaleType(SCALE_TYPE);        mReady = true;        if (mSetupPending) {            setup();            mSetupPending = false;        }    }    @Override    public ScaleType getScaleType() {        return SCALE_TYPE;    }    @Override    public void setScaleType(ScaleType scaleType) {        if (scaleType != SCALE_TYPE) {            throw new IllegalArgumentException(String.format("ScaleType %s not supported.", scaleType));        }    }    @Override    protected void onDraw(Canvas canvas) {        if (getDrawable() == null) {            return;        }        canvas.drawCircle(getWidth() / 2, getHeight() / 2, mDrawableRadius, mBitmapPaint);        if (mBorderWidth != 0) {            canvas.drawCircle(getWidth() / 2, getHeight() / 2, mBorderRadius, mBorderPaint);        }    }    @Override    protected void onSizeChanged(int w, int h, int oldw, int oldh) {        super.onSizeChanged(w, h, oldw, oldh);        setup();    }    public int getBorderColor() {        return mBorderColor;    }    public void setBorderColor(int borderColor) {        if (borderColor == mBorderColor) {            return;        }        mBorderColor = borderColor;        mBorderPaint.setColor(mBorderColor);        invalidate();    }    public int getBorderWidth() {        return mBorderWidth;    }    public void setBorderWidth(int borderWidth) {        if (borderWidth == mBorderWidth) {            return;        }        mBorderWidth = borderWidth;        setup();    }    @Override    public void setImageBitmap(Bitmap bm) {        super.setImageBitmap(bm);        mBitmap = bm;        setup();    }    @Override    public void setImageDrawable(Drawable drawable) {        super.setImageDrawable(drawable);        mBitmap = getBitmapFromDrawable(drawable);        setup();    }    @Override    public void setImageResource(int resId) {        super.setImageResource(resId);        mBitmap = getBitmapFromDrawable(getDrawable());        setup();    }    @Override    public void setImageURI(Uri uri) {        super.setImageURI(uri);        mBitmap = getBitmapFromDrawable(getDrawable());        setup();    }    private Bitmap getBitmapFromDrawable(Drawable drawable) {        if (drawable == null) {            return null;        }        if (drawable instanceof BitmapDrawable) {            return ((BitmapDrawable) drawable).getBitmap();        }        try {            Bitmap bitmap;            if (drawable instanceof ColorDrawable) {                bitmap = Bitmap.createBitmap(COLORDRAWABLE_DIMENSION, COLORDRAWABLE_DIMENSION, BITMAP_CONFIG);            } else {                bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), BITMAP_CONFIG);            }            Canvas canvas = new Canvas(bitmap);            drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());            drawable.draw(canvas);            return bitmap;        } catch (OutOfMemoryError e) {            return null;        }    }    private void setup() {        if (!mReady) {            mSetupPending = true;            return;        }        if (mBitmap == null) {            return;        }        mBitmapShader = new BitmapShader(mBitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);        mBitmapPaint.setAntiAlias(true);        mBitmapPaint.setShader(mBitmapShader);        mBorderPaint.setStyle(Paint.Style.STROKE);        mBorderPaint.setAntiAlias(true);        mBorderPaint.setColor(mBorderColor);        mBorderPaint.setStrokeWidth(mBorderWidth);        mBitmapHeight = mBitmap.getHeight();        mBitmapWidth = mBitmap.getWidth();        mBorderRect.set(0, 0, getWidth(), getHeight());        mBorderRadius = Math.min((mBorderRect.height() - mBorderWidth) / 2, (mBorderRect.width() - mBorderWidth) / 2);        mDrawableRect.set(mBorderWidth, mBorderWidth, mBorderRect.width() - mBorderWidth, mBorderRect.height() - mBorderWidth);        mDrawableRadius = Math.min(mDrawableRect.height() / 2, mDrawableRect.width() / 2);        updateShaderMatrix();        invalidate();    }    private void updateShaderMatrix() {        float scale;        float dx = 0;        float dy = 0;        mShaderMatrix.set(null);        if (mBitmapWidth * mDrawableRect.height() > mDrawableRect.width() * mBitmapHeight) {            scale = mDrawableRect.height() / (float) mBitmapHeight;            dx = (mDrawableRect.width() - mBitmapWidth * scale) * 0.5f;        } else {            scale = mDrawableRect.width() / (float) mBitmapWidth;            dy = (mDrawableRect.height() - mBitmapHeight * scale) * 0.5f;        }        mShaderMatrix.setScale(scale, scale);        mShaderMatrix.postTranslate((int) (dx + 0.5f) + mBorderWidth, (int) (dy + 0.5f) + mBorderWidth);        mBitmapShader.setLocalMatrix(mShaderMatrix);    }}

main_activity.xml文件：

xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:circleimageView="http://schemas.android.com/apk/res/com.example.ceshidemo" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <TextView android:id="@+id/bt_photo" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="拍照或者选择图片" > </TextView> <com.example.ceshidemo.CircleImageView android:id="@+id/headIcon" android:layout_width="65dp" android:layout_height="65dp" android:layout_gravity="center" android:layout_marginBottom="8dp" circleimageView:border_color="#ffffff" circleimageView:border_width="1dp" /> </LinearLayout>

自己定义圆形的属性文件：

上面全部代码，  ：http://download.csdn.net/detail/onceing/8884045