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Android选取相机、相册图片进行裁剪,并更新UI

来源:程序员人生   发布时间:2015-08-20 07:58:38 阅读次数:2593次

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

效果图:
这里写图片描述
这里写图片描述

界面非常的简单,只有1个imageView,通过点击该ImageView,从相册当选取照片,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1下工程的xml,和.java文件:
这里写图片描述
这里写图片描述

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

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="utf⑻"?> <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 (316910444@qq.com) Create at 2015⑷⑶0 上午11:14:31 */ public class MainActivity extends Activity implements android.view.View.OnClickListener { private ImageView faceImage; /* 要求码 */ 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 :316910444@qq.com<br> * QQ: 316910444<br> * @version 创建时间? 2015⑷⑶0 上午11:33:03 */ public class SelectPicActivity extends Activity implements OnClickListener { /*** * 使用照相机拍照获得图?? */ 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: // 从相册中获得图片 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:// ⑴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: // 图片裁剪完以后 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(); //对图片进行紧缩,第2个参数为紧缩的百分比,100为不紧缩 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");获得 intent.putExtra("return-data", true); startActivityForResult(intent, PHOTO_CLIP); } }

基本上注释都写得很清楚了,还有1伙的话,大家可以下载demo运行1下。

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

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