调用系统相机相册上传头像

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;

    private static final int REQUESTCODE_PICK =1 ;

    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 pickIntent = new Intent(Intent.ACTION_PICK, null);

                        // 如果朋友们要限制上传到服务器的图片类型时可以直接写如：image/jpeg 、 image/png等的类型

                        pickIntent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");

            startActivityForResult(pickIntent, REQUESTCODE_PICK);

                        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

     */

    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

            // ...

        }

    }
}

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 = null;
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)) { // ת�����
localPath = photoFile.getPath();
fileOutputStream.flush();
}
}
} catch (FileNotFoundException e) {
photoFile.delete();
localPath = null;
e.printStackTrace();
} catch (IOException e) {
photoFile.delete();
localPath = null;
e.printStackTrace();
} finally {
try {
if (fileOutputStream != null) {
fileOutputStream.close();
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ileOutputStream = null;
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
return localPath;
}

/**
* ת��ͼƬ��Բ��
* 
* @param bitmap
*            ����Bitmap����
* @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;
left = 0;
top = 0;
right = width;
bottom = 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);// ���û����޾��

canvas.drawARGB(0, 0, 0, 0); // �������Canvas
paint.setColor(color);

// ���������ַ�����Բ,drawRounRect��drawCircle
// canvas.drawRoundRect(rectF, roundPx, roundPx, paint);//
// ��Բ�Ǿ��Σ���һ������Ϊͼ����ʾ���