Android拍照後先剪裁再顯示圖片

mainActivity如下:

package cn.testcamera;import java.io.File;import java.text.SimpleDateFormat;import java.util.Date;import android.app.Activity;import android.content.ContentResolver;import android.content.ContentUris;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.provider.MediaStore;import android.view.View;import android.widget.Button;import android.widget.ImageView;public class MainActivity extends Activity {private Button mButton;private ImageView mImageView;private File mPhotoFile;private String mPhotoPath;private Uri mPhotoOnSDCardUri;    public final static int CAMERA_RESULT=777;    public final static int CAMERA_RESULT_CUT=888;    public final static int CAMERA_RESULT_CUT_OVER=999;    public final static String TAG="xx";@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);mButton = (Button) findViewById(R.id.button);mButton.setOnClickListener(new ButtonOnClickListener());mImageView = (ImageView) findViewById(R.id.imageView);}private class ButtonOnClickListener implements View.OnClickListener {public void onClick(View v) {try {Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");mPhotoPath="mnt/sdcard/DCIM/Camera/"+getPhotoFileName();mPhotoFile = new File(mPhotoPath);if (!mPhotoFile.exists()) {mPhotoFile.createNewFile();}mPhotoOnSDCardUri=Uri.fromFile(mPhotoFile);    intent.putExtra(MediaStore.EXTRA_OUTPUT, mPhotoOnSDCardUri);    //拍照後顯示此圖片        //startActivityForResult(intent,CAMERA_RESULT);        //拍照後先修改再顯示此圖片        startActivityForResult(intent,CAMERA_RESULT_CUT);} catch (Exception e) {}}}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {super.onActivityResult(requestCode, resultCode, data);//1   拍照後顯示照片if (requestCode==CAMERA_RESULT) { Bitmap bitmap = BitmapFactory.decodeFile(mPhotoPath, null);   mImageView.setImageBitmap(bitmap);}//2   拍照後剪下照片,然後顯示//2.1拍照且剪裁if (requestCode == CAMERA_RESULT_CUT) {Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,mPhotoOnSDCardUri);sendBroadcast(intent);try {Thread.sleep(2000);} catch (InterruptedException e) {e.printStackTrace();}Uri systemImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;ContentResolver contentResolver = getContentResolver();Cursor cursor = contentResolver.query(systemImageUri, null,MediaStore.Images.Media.DISPLAY_NAME + "='"+ mPhotoFile.getName() + "'", null, null);Uri photoUriInMedia = null;if (cursor != null && cursor.getCount() > 0) {cursor.moveToLast();long id = cursor.getLong(0);photoUriInMedia = ContentUris.withAppendedId(systemImageUri, id);}cursor.close();Intent in = new Intent("com.android.camera.action.CROP");//需要裁減的圖片格式in.setDataAndType(photoUriInMedia, "image/*");//允許裁減in.putExtra("crop", "true");//剪裁後ImageView顯時圖片的寬in.putExtra("outputX", 250);//剪裁後ImageView顯時圖片的高in.putExtra("outputY", 250);//設定剪裁框的寬高比例in.putExtra("aspectX", 1);in.putExtra("aspectY", 1);in.putExtra("return-data", true);startActivityForResult(in, CAMERA_RESULT_CUT_OVER);}//2.2顯示if (requestCode==CAMERA_RESULT_CUT_OVER) {//剪下圖片的時候,若"放棄"則回答的data為nullif (data!=null) {Bitmap bitmap = (Bitmap) data.getExtras().get("data");mImageView.setImageBitmap(bitmap);}}}private String getPhotoFileName() {Date date = new Date(System.currentTimeMillis());SimpleDateFormat dateFormat = new SimpleDateFormat("'IMG'_yyyyMMdd_HHmmss");return dateFormat.format(date) + ".jpg";}}

main.xml如下:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent" >    <Button        android:id="@+id/button"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="點擊按鈕拍照"     />    <ImageView         android:id="@+id/imageView"        android:layout_below="@id/button"        android:layout_width="fill_parent"        android:layout_height="wrap_content"     /></RelativeLayout>

manifest.xml如下:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="cn.testcamera"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="10" />    <uses-permission android:name="android.permission.CAMERA"/>    <uses-permission android:name="android.permission.INTERNET" />    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />      <application        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name=".MainActivity"            android:launchMode="singleTask"            android:label="@string/title_activity_main" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>