调用手机照相和相册来显示个人信心头像并上传至服务器

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