Android拣选相机、相册图片进行裁剪，并更新UI

demo源码：http://download.csdn.net/detail/u010778159/8650897

效果图：

界面非常的简单，只有一个imageView,通过点击该ImageView,从相册中选取照片，或拍照，将得到的照片按要求进行裁剪，然后将裁剪后的照片更新到ImageView中。

现在，来看一下工程的xml，和.java文件：

1. 有两个xml文件，main.xml是进入app时的主页面，有一个ImageView
2. select_pic_layout.xml是点击ImageView之后弹出来的框，一共有3个button,从中可以选择是从相机中获取图片还是相册中获取图片

来看下详细代码：
main.xml:

<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" >    <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:background="@drawable/item_edit_bg"        android:clickable="true"        android:padding="5dip" >        <ImageView            android:id="@+id/face"            android:layout_width="match_parent"            android:layout_height="180dp"            android:layout_alignParentLeft="true"            android:scaleType="centerCrop"              android:src="@drawable/mini_avatar" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_gravity="center"            android:layout_marginLeft="5dip"            android:layout_marginTop="5dip"            android:layout_toRightOf="@id/face"            android:text="设置头像"            android:textColor="@android:color/black" />    </RelativeLayout></LinearLayout>

select_pic_layout.xml:

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:gravity="center_horizontal"    android:orientation="vertical" >    <LinearLayout        android:id="@+id/dialog_layout"        android:layout_width="fill_parent"        android:layout_height="200dp"        android:layout_alignParentBottom="true"        android:background="@drawable/sf_takephoto_bg"        android:gravity="center_horizontal"        android:orientation="vertical" >        <Button            android:id="@+id/btn_take_photo"            android:layout_width="fill_parent"            android:layout_height="wrap_content"            android:layout_marginLeft="20dip"            android:layout_marginRight="20dip"            android:layout_marginTop="20dip"            android:background="@drawable/btn_style_alert_dialog_button"            android:text="拍照"            android:textStyle="bold" />        <Button            android:id="@+id/btn_pick_photo"            android:layout_width="fill_parent"            android:layout_height="wrap_content"            android:layout_marginLeft="20dip"            android:layout_marginRight="20dip"            android:layout_marginTop="5dip"            android:background="@drawable/btn_style_alert_dialog_button"            android:text="从相册选择"            android:textStyle="bold" />        <Button            android:id="@+id/btn_cancel"            android:layout_width="fill_parent"            android:layout_height="wrap_content"            android:layout_marginBottom="15dip"            android:layout_marginLeft="20dip"            android:layout_marginRight="20dip"            android:layout_marginTop="15dip"            android:background="@drawable/btn_style_alert_dialog_cancel"            android:text="取消"            android:textColor="#ffffff"            android:textStyle="bold" />    </LinearLayout></RelativeLayout>

MainActivity.java:

import java.io.File;import android.app.Activity;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;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.DisplayMetrics;import android.util.Log;import android.view.View;import android.view.Window;import android.widget.ImageView;import android.widget.RelativeLayout;import android.widget.TextView;/** *  * @author Liuzhipeng ([email protected]) Create at 2015-4-30 上午11:14:31 */public class MainActivity extends Activity implements        android.view.View.OnClickListener {    private ImageView faceImage;    /* 请求码 */    private static final int REQUEST_PHOTO = 1;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        requestWindowFeature(Window.FEATURE_NO_TITLE); // 去掉标题        setContentView(R.layout.main);        faceImage = (ImageView) findViewById(R.id.face);        // 设置事件监听        faceImage.setOnClickListener(this);    }    @Override    public void onClick(View arg0) {        // TODO Auto-generated method stub        switch (arg0.getId()) {        case R.id.face:            Intent intent = new Intent(this, SelectPicActivity.class);            startActivityForResult(intent, REQUEST_PHOTO);            break;        default:            break;        }    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        // TODO Auto-generated method stub        if(resultCode==Activity.RESULT_OK){        switch (requestCode) {        case REQUEST_PHOTO:            Log.e("PhotoClip", "aaaaaaaaaa");            if (data != null) {                byte[] bis = data.getByteArrayExtra("bitmap");                Bitmap bm = BitmapFactory.decodeByteArray(bis, 0, bis.length);                faceImage.setImageBitmap(bm);            }        default:            break;        }        }        super.onActivityResult(requestCode, resultCode, data);    }}

SelectPicActivity.java:

import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import android.app.Activity;import android.content.ContentValues;import android.content.Intent;import android.database.Cursor;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.provider.MediaStore;import android.util.Log;import android.view.MotionEvent;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.LinearLayout;import android.widget.Toast;/** * @author 刘志鹏<br> *         Email :[email protected]<br> *         QQ: 316910444<br> * @version 创建时间? 2015-4-30 上午11:33:03 */public class SelectPicActivity extends Activity implements OnClickListener {    /***     * 使用照相机拍照获取图??     */    public static final int SELECT_PIC_BY_TACK_PHOTO = 1;    /***     * 使用相册中的图片     */    public static final int SELECT_PIC_BY_PICK_PHOTO = 2;    private LinearLayout dialogLayout;    private Button takePhotoBtn, pickPhotoBtn, cancelBtn;    // MainActivity中跳转到SelectPicActivity的Intent    private Intent lastIntent;    private static final int PHOTO_REQUEST = 1;    private static final int CAMERA_REQUEST = 2;    private static final int PHOTO_CLIP = 3;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.select_pic_layout);        initView();    }    /**     * 初始化加载View     */    private void initView() {        dialogLayout = (LinearLayout) findViewById(R.id.dialog_layout);        dialogLayout.setOnClickListener(this);        takePhotoBtn = (Button) findViewById(R.id.btn_take_photo);        takePhotoBtn.setOnClickListener(this);        pickPhotoBtn = (Button) findViewById(R.id.btn_pick_photo);        pickPhotoBtn.setOnClickListener(this);        cancelBtn = (Button) findViewById(R.id.btn_cancel);        cancelBtn.setOnClickListener(this);        // 得到在MainActivity中的Intent        lastIntent = getIntent();    }    @Override    public void onClick(View v) {        switch (v.getId()) {        case R.id.dialog_layout:            finish();            break;        case R.id.btn_take_photo:            // 调用摄像头            getPicFromCamera();            break;        case R.id.btn_pick_photo:            // 从相册中获取图片            getPicFromPhoto();            break;        default:            finish();            break;        }    }    private void getPicFromPhoto() {        Intent intent = new Intent(Intent.ACTION_PICK, null);        intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,                "image/*");        startActivityForResult(intent, PHOTO_REQUEST);    }    private void getPicFromCamera() {        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);        // 下面这句指定调用相机拍照后的照片存储的路径        intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(                Environment.getExternalStorageDirectory(), "test.jpg")));        startActivityForResult(intent, CAMERA_REQUEST);    }    // 点击空白处，finish掉,退回到MainActivity    @Override    public boolean onTouchEvent(MotionEvent event) {        finish();        return super.onTouchEvent(event);    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        // TODO Auto-generated method stub        super.onActivityResult(requestCode, resultCode, data);        switch (requestCode) {        case CAMERA_REQUEST:            switch (resultCode) {            case -1:// -1表示拍照成功                // 得到刚刚拍照的照片                File file = new File(Environment.getExternalStorageDirectory()                        + "/test.jpg");                if (file.exists()) {                    // 对图片进行裁剪，传入该文件的Uri                    photoClip(Uri.fromFile(file));                }                break;            default:                break;            }            break;        case PHOTO_REQUEST:            if (data != null) {                photoClip(data.getData());            }            break;        case PHOTO_CLIP:            // 图片裁剪完之后            if (data != null) {                Bundle extras = data.getExtras();                if (extras != null) {                    Bitmap photo = extras.getParcelable("data");                    //将Bitmap转换为Byte[]通过Bundle传到MainActivity                    ByteArrayOutputStream baos = new ByteArrayOutputStream();                    //对图片进行压缩，第二个参数为压缩的百分比，100为不压缩                    photo.compress(Bitmap.CompressFormat.JPEG, 100, baos);                    byte[] bitmapByte = baos.toByteArray();                    lastIntent.putExtra("bitmap", bitmapByte);                    //跳回到MainActivity，调用OnActivityResult()                    setResult(Activity.RESULT_OK, lastIntent);                    finish();                    // faceImage.setImageBitmap(photo);                }            }            break;        default:            break;        }    }    private void photoClip(Uri uri) {        // 调用系统中自带的图片剪裁        Intent intent = new Intent("com.android.camera.action.CROP");        intent.setDataAndType(uri, "image/*");        // 下面这个crop=true是设置在开启的Intent中设置显示的VIEW可裁剪        intent.putExtra("crop", "true");        // aspectX aspectY 是宽高的比例        intent.putExtra("aspectX", 7);        intent.putExtra("aspectY", 4);        // outputX outputY 是裁剪图片宽高        intent.putExtra("outputX", 315);        intent.putExtra("outputY", 180);        // 如果为true，会返回bitmap，通过data.getExtras().getParcelable("data");获取        intent.putExtra("return-data", true);        startActivityForResult(intent, PHOTO_CLIP);    }}

基本上注释都写得很清楚了，还有一伙的话，大家可以下载demo运行一下。

demo源码：http://download.csdn.net/detail/u010778159/8650897