（转）android头像设置：从本地照片库或拍照获取并剪裁

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:background="#F3F1DA"

    android:orientation="vertical" >

    <!-- title -->

    <LinearLayout

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:background="@drawable/title_bg"

        android:gravity="center"

        android:orientation="horizontal" >

        <TextView

            android:layout_width="fill_parent"

            android:layout_height="wrap_content"

            android:gravity="center"

            android:text="@string/title_bar_txt"

            android:textColor="@android:color/white" />

    </LinearLayout>

    <!-- image switch -->

    <RelativeLayout

        android:id="@+id/switch_face_rl"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:layout_gravity="center"

        android:layout_margin="20dip"

        android:background="@drawable/item_edit_bg"

        android:clickable="true"

        android:padding="5dip" >

        <ImageView

            android:id="@+id/face"

            android:layout_width="42dip"

            android:layout_height="42dip"

            android:layout_alignParentLeft="true"

            android:layout_marginLeft="10dip"

            android:src="@drawable/mini_avatar" />

        <TextView

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_marginLeft="5dip"

            android:layout_marginTop="5dip"

            android:layout_toRightOf="@id/face"

            android:layout_gravity="center"

            android:text="点击设置头像"

            android:textColor="@android:color/black" />

    </RelativeLayout>

</LinearLayout>

package com.xzw.picture;

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import com.xzw.utils.Tools;

import android.app.Activity;

import android.app.AlertDialog;

import android.content.DialogInterface;

import android.content.Intent;

import android.graphics.Bitmap;

import android.graphics.drawable.BitmapDrawable;

import android.graphics.drawable.Drawable;

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.Window;

import android.widget.ImageView;

import android.widget.RelativeLayout;

import android.widget.Toast;

/**

 *

 * @author XuZhiwei (xuzw13@gmail.com) Create at 2012-8-17 上午10:14:40

 */

public class MainActivity extends Activity {

    /* 组件 */

    private RelativeLayout switchAvatar;

    private ImageView faceImage;

    private String[] items = new String[] { "选择本地图片", "拍照" };

    /* 头像名称 */

    private static final String IMAGE_FILE_NAME = "faceImage.jpg";

    /* 请求码 */

    private static final int IMAGE_REQUEST_CODE = 0;

    private static final int CAMERA_REQUEST_CODE = 1;

    private static final int RESULT_REQUEST_CODE = 2;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE); // 去掉标题

        setContentView(R.layout.main);

        switchAvatar = (RelativeLayout) findViewById(R.id.switch_face_rl);

        faceImage = (ImageView) findViewById(R.id.face);

        // 设置事件监听

        switchAvatar.setOnClickListener(listener);

    }

    private View.OnClickListener listener = new View.OnClickListener() {

        @Override

        public void onClick(View v) {

            showDialog();

        }

    };

    /**

     * 显示选择对话框

     */

    private void showDialog() {

        new AlertDialog.Builder(this)

                .setTitle("设置头像")

                .setItems(items, new DialogInterface.OnClickListener() {

                    @Override

                    public void onClick(DialogInterface dialog, int which) {

                        switch (which) {

                        case 0:

                            Intent intentFromGallery = new Intent();

                            intentFromGallery.setType("image/*"); // 设置文件类型

                            intentFromGallery

                                    .setAction(Intent.ACTION_GET_CONTENT);

                            startActivityForResult(intentFromGallery,

                                    IMAGE_REQUEST_CODE);

                            break;

                        case 1:

                            Intent intentFromCapture = new Intent(

                                    MediaStore.ACTION_IMAGE_CAPTURE);

                            // 判断存储卡是否可以用，可用进行存储

                            if (Tools.hasSdcard()) {

                               File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);

                               File file = new File(path,IMAGE_FILE_NAME);

                                intentFromCapture.putExtra(

                                        MediaStore.EXTRA_OUTPUT,

                                        Uri.fromFile(file));

                            }

                            startActivityForResult(intentFromCapture,CAMERA_REQUEST_CODE);

                            break;

                        }

                    }

                })

                .setNegativeButton("取消", new DialogInterface.OnClickListener() {

                    @Override

                    public void onClick(DialogInterface dialog, int which) {

                        dialog.dismiss();

                    }

                }).show();

    }

    @Override

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        //结果码不等于取消时候

        if (resultCode != RESULT_CANCELED) {

            switch (requestCode) {

            case IMAGE_REQUEST_CODE:

                startPhotoZoom(data.getData());

                break;

            case CAMERA_REQUEST_CODE:

                if (Tools.hasSdcard()) {

                   File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);

                   File tempFile = new File(path,IMAGE_FILE_NAME);

                    startPhotoZoom(Uri.fromFile(tempFile));

                } else {

                    Toast.makeText(MainActivity.this, "未找到存储卡，无法存储照片！",Toast.LENGTH_LONG).show();

                }

                break;

            case RESULT_REQUEST_CODE: //图片缩放完成后

                if (data != null) {

                    getImageToView(data);

                }

                break;

            }

        }

        super.onActivityResult(requestCode, resultCode, data);

    }

    /**

     * 裁剪图片方法实现

     *

     * @param uri

     */

    public void startPhotoZoom(Uri 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", 340);

        intent.putExtra("outputY", 340);

        intent.putExtra("return-data", true);

        startActivityForResult(intent, RESULT_REQUEST_CODE);

    }

    /**

     * 保存裁剪之后的图片数据

     *

     * @param picdata

     */

    private void getImageToView(Intent data) {

        Bundle extras = data.getExtras();

        if (extras != null) {

            Bitmap photo = extras.getParcelable("data");

            Drawable drawable = new BitmapDrawable(this.getResources(),photo);

            faceImage.setImageDrawable(drawable);

        }

    }

}

package com.xzw.utils;

import android.os.Environment;

/**

 *

 * @author XuZhiwei (xuzw13@gmail.com)

 * Create at 2012-8-17 上午10:14:40

 */

public class Tools {

    /**

     * 检查是否存在SDCard

     * @return

     */

    public static boolean hasSdcard(){

        String state = Environment.getExternalStorageState();

        if(state.equals(Environment.MEDIA_MOUNTED)){

            return true;

        }else{

            return false;

        }

    }

}