从相册和相机获取头像

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="300dp"
    android:layout_height="wrap_content"
    android:orientation="vertical">
    <ImageView
        android:id="@+id/iv3"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:src="@mipmap/run"/>

</LinearLayout>

package lebang.bwie.com.lebang.activity;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

import com.google.android.gms.appindexing.Action;
import com.google.android.gms.appindexing.AppIndex;
import com.google.android.gms.common.api.GoogleApiClient;
import com.lidroid.xutils.BitmapUtils;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import lebang.bwie.com.lebang.R;

public class PhotoActivity extends AppCompatActivity {
    private static final int PHOTO_REQUEST_TAKEPHOTO = 1;// 拍照
    private static final int PHOTO_REQUEST_GALLERY = 2;// 从相册中选择
    private static final int PHOTO_REQUEST_CUT = 3;// 结果
    private File tempFile = new File(Environment.getExternalStorageDirectory(),
            getPhotoFileName());
    private ImageView iv;
    /**
     * ATTENTION: This was auto-generated to implement the App Indexing API.
     * See https://g.co/AppIndexing/AndroidStudio for more information.
     */
   private Bitmap photo;

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case PHOTO_REQUEST_TAKEPHOTO:// 当选择拍照时调用
                startPhotoZoom(Uri.fromFile(tempFile));
                break;
            case PHOTO_REQUEST_GALLERY:// 当选择从本地获取图片时
                // 做非空判断，当我们觉得不满意想重新剪裁的时候便不会报异常，下同
                if (data != null) {
                    System.out.println("11================");
                    startPhotoZoom(data.getData());
                } else {
                    System.out.println("================");
                }
                break;
            case PHOTO_REQUEST_CUT:// 返回的结果
                if (data != null)
                    // setPicToView(data);
                    setPicToView(data);

                break;
        }
        super.onActivityResult(requestCode, resultCode, data);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
//        setContentView(R.layout.activity_photo);
        setContentView(R.layout.layout_p);
        iv = (ImageView) findViewById(R.id.iv3);
        iv.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
 //               AlertDialog mDialog = new AlertDialog.Builder(PhotoActivity.this, R.style.FullScreenDialog).create();
                AlertDialog mDialog = new AlertDialog.Builder(PhotoActivity.this)
       //                 .setIcon(R.drawable.xiangji)
                        .setTitle("选择上传头像方式")
       //                 .setIcon(android.R.drawable.ic_dialog_info)
                        .setPositiveButton("照相", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                //调用系统拍照功能：
                                Intent cameraintent = new Intent(
                                        MediaStore.ACTION_IMAGE_CAPTURE);
                                // 指定调用相机拍照后照片的储存路径
                                cameraintent.putExtra(MediaStore.EXTRA_OUTPUT,
                                        Uri.fromFile(tempFile));
                                startActivityForResult(cameraintent,
                                        PHOTO_REQUEST_TAKEPHOTO);
                            }
                        })
                        .setNegativeButton("相册", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                //调用系统相册功能：
                                Intent getAlbum = new Intent(Intent.ACTION_GET_CONTENT);
                                getAlbum.setType("image/*");
                                startActivityForResult(getAlbum, PHOTO_REQUEST_GALLERY);
                            }
                        }).create();

                if (mDialog != null && !mDialog.isShowing()) {
                    mDialog.show();
               // mDialog.setContentView(R.layout.layout_p);
                    mDialog.setCanceledOnTouchOutside(false);
                }
            }
        });
    }

    // 将进行剪裁后的图片显示到UI界面上
    private void setPicToView(Intent picdata) {
        Bundle bundle = picdata.getExtras();
        if (bundle != null) {
            photo = bundle.getParcelable("data");
            iv.setImageBitmap(photo);

        }
    }

    // 使用系统当前日期加以调整作为照片的名称
    private String getPhotoFileName() {
        Date date = new Date(System.currentTimeMillis());
        SimpleDateFormat dateFormat = new SimpleDateFormat(
                "‘IMG‘_yyyyMMdd_HHmmss");
        return dateFormat.format(date) + ".jpg";
    }

    private void startPhotoZoom(Uri uri) {
        Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setDataAndType(uri, "image/*");
        // crop为true是设置在开启的intent中设置显示的view可以剪裁
        intent.putExtra("crop", "true");

        // aspectX aspectY 是宽高的比例
        intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);

        // outputX,outputY 是剪裁图片的宽高
        intent.putExtra("outputX", 300);
        intent.putExtra("outputY", 300);
        intent.putExtra("return-data", true);
        intent.putExtra("noFaceDetection", true);
        System.out.println("22================");
        startActivityForResult(intent, PHOTO_REQUEST_CUT);
    }
}