Android编程实现调用相册、相机及拍照后直接裁剪的方法

本文实例讲述了Android编程实现调用相册、相机及拍照后直接裁剪的方法。分享给大家供大家参考，具体如下：

package com.cvte.health.phone;
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.drawable.Drawable;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import com.cvte.health.AccountManager;
import com.cvte.health.HealthApplication;
import com.cvte.health.R;
import com.cvte.health.api.ImageUpdater;
import com.cvte.health.database.User;
public class ChangePortraitActivity extends Activity {
 private ImageView mImageView;
 private Button mButtonCamera;
 private Button mButtonPhoto;
 private Button mButtonBack;
 private Button mButtonSave;
 private User mUser = null;
 private File mCurrentPhotoFile;
 @Override
 public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_change_portrait);
   HealthApplication.getInstance().addActivity(this);
   mUser = AccountManager.getInstance().getCurrentUser();
   mImageView = (ImageView) this.findViewById(R.id.imageview_preview);
   mButtonCamera = (Button) this.findViewById(R.id.button_cameraButton);
   mButtonPhoto = (Button) this.findViewById(R.id.button_photoButton);
   mButtonBack = (Button) findViewById(R.id.button_back);
   mButtonSave = (Button) findViewById(R.id.button_save);
   ImageUpdater.getInstance(this).updateUserPhoto(mUser, mImageView);
   mButtonCamera.setOnClickListener(new OnClickListener() {
     @Override
     public void onClick(View v) {
       Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
       mCurrentPhotoFile = new File("mnt/sdcard/DCIM/Camera/",
           getPhotoFileName());
       intent.putExtra(MediaStore.EXTRA_OUTPUT,
           Uri.fromFile(mCurrentPhotoFile));
       startActivityForResult(intent, Activity.DEFAULT_KEYS_DIALER);
       /*
        * Intent intent = new
        * Intent("android.media.action.IMAGE_CAPTURE");
        * intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new
        * File(Environment .getExternalStorageDirectory(),
        * "camera.jpg")));
        * intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 0);
        * startActivityForResult(intent, 10);
        */
     }
   });
   mButtonPhoto.setOnClickListener(new OnClickListener() {
     @Override
     public void onClick(View v) {
       Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
       intent.addCategory(Intent.CATEGORY_OPENABLE);
       intent.setType("image/*");
       intent.putExtra("crop", "true");
       intent.putExtra("aspectX", 1);
       intent.putExtra("aspectY", 1);
       intent.putExtra("outputX", 300);
       intent.putExtra("outputY", 300);
       intent.putExtra("return-data", true);
       startActivityForResult(intent, 11);
     }
   });
   mButtonBack.setOnClickListener(new OnClickListener() {
     @Override
     public void onClick(View v) {
       finish();
     }
   });
   mButtonSave.setOnClickListener(new OnClickListener() {
     @Override
     public void onClick(View v) {
       Intent intent = new Intent(ChangePortraitActivity.this,
           UserProfileActivity.class);
       mImageView.setDrawingCacheEnabled(Boolean.TRUE);
       intent.putExtra("BITMAP", mImageView.getDrawingCache()); // 这里可以放一个bitmap
       startActivity(intent);
       finish();
       overridePendingTransition(R.anim.activity_in_from_left,
           R.anim.activity_out_from_right);
     }
   });
 }
 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
   if (requestCode == 10 && resultCode == Activity.RESULT_OK) {
     mImageView.setImageDrawable(Drawable.createFromPath(new File(
         Environment.getExternalStorageDirectory(), "camera.jpg")
         .getAbsolutePath()));
   } else if (requestCode == 11 && resultCode == Activity.RESULT_OK) {
     Bitmap cameraBitmap = (Bitmap) data.getExtras().get("data");
     mImageView.setImageBitmap(cameraBitmap);
   } else if (requestCode == 1 && resultCode == Activity.RESULT_OK) {
     Uri imgUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
     ContentResolver cr = ChangePortraitActivity.this
         .getContentResolver();
     Uri fileUri = Uri.fromFile(mCurrentPhotoFile);
     sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,
         fileUri));
     try {
       Thread.sleep(3000);
     } catch (InterruptedException e) {
       e.printStackTrace();
     }
     Cursor cursor = cr.query(imgUri, null,
         MediaStore.Images.Media.DISPLAY_NAME + "='"
             + mCurrentPhotoFile.getName() + "'", null, null);
     Uri uri = null;
     if (cursor != null && cursor.getCount() > 0) {
       cursor.moveToLast();
       long id = cursor.getLong(0);
       uri = ContentUris.withAppendedId(imgUri, id);
     }
     final Intent intent = new Intent("com.android.camera.action.CROP");
     intent.setDataAndType(uri, "image/*");
     intent.putExtra("crop", "true");
     intent.putExtra("aspectX", 1);
     intent.putExtra("aspectY", 1);
     intent.putExtra("outputX", 300);
     intent.putExtra("outputY", 300);
     intent.putExtra("return-data", true);
     ChangePortraitActivity.this.startActivityForResult(intent, 3);
   } else if (requestCode == 3 && resultCode == Activity.RESULT_OK) {
     Bitmap cameraBitmap = (Bitmap) data.getExtras().get("data");
     mImageView.setImageBitmap(cameraBitmap);
   }
 }
 private String getPhotoFileName() {
   Date date = new Date(System.currentTimeMillis());
   SimpleDateFormat dateFormat = new SimpleDateFormat(
       "'IMG'_yyyyMMdd_HHmmss");
   return dateFormat.format(date) + ".jpg";
 }
}

希望本文所述对大家Android程序设计有所帮助。