Android实现拍照、选择相册图片并裁剪功能

public class UploadPicActivity extends Activity implements View.OnClickListener { private Button take_photo_btn; private Button select_photo_btn; private ImageView photo_iv; //使用照相机拍照获取图片 public static final int TAKE_PHOTO_CODE = 1; //使用相册中的图片 public static final int SELECT_PIC_CODE = 2; //图片裁剪 private static final int PHOTO_CROP_CODE = 3; //定义图片的Uri private Uri photoUri; //图片文件路径 private String picPath; @Override protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_upload_pic);  initViews(); } private void initViews() {  this.take_photo_btn = (Button) findViewById(R.id.take_photo_btn);  this.take_photo_btn.setOnClickListener(this);  this.select_photo_btn = (Button) findViewById(R.id.select_photo_btn);  this.select_photo_btn.setOnClickListener(this);  this.photo_iv = (ImageView) findViewById(R.id.photo_iv); } @Override public void onClick(View view) {  switch (view.getId()) {   //拍照   case R.id.take_photo_btn:    picTyTakePhoto();    break;   //选择图库   case R.id.select_photo_btn:    pickPhoto();    break;  } } /**  * 拍照获取图片  */ private void picTyTakePhoto() {  //判断SD卡是否存在  String SDState = Environment.getExternalStorageState();  if (SDState.equals(Environment.MEDIA_MOUNTED)) {   Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);//"android.media.action.IMAGE_CAPTURE"/*** * 使用照相机拍照，拍照后的图片会存放在相册中。使用这种方式好处就是：获取的图片是拍照后的原图， * 如果不实用ContentValues存放照片路径的话，拍照后获取的图片为缩略图有可能不清晰 */   ContentValues values = new ContentValues();   photoUri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);   intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, photoUri);   startActivityForResult(intent, TAKE_PHOTO_CODE);  } else {   Toast.makeText(this, "内存卡不存在", Toast.LENGTH_LONG).show();  } } /***  * 从相册中取图片  */ private void pickPhoto() {  Intent intent = new Intent(Intent.ACTION_PICK, null);  intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,    "image/*");  startActivityForResult(intent, SELECT_PIC_CODE); } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) {  super.onActivityResult(requestCode, resultCode, data);  if (resultCode == Activity.RESULT_OK) {   //从相册取图片，有些手机有异常情况，请注意   if (requestCode == SELECT_PIC_CODE) {    if (null != data && null != data.getData()) {     photoUri = data.getData();     picPath = uriToFilePath(photoUri);     startPhotoZoom(photoUri, PHOTO_CROP_CODE);    } else {     Toast.makeText(this, "图片选择失败", Toast.LENGTH_LONG).show();    }   } else if (requestCode == TAKE_PHOTO_CODE) {    String[] pojo = {MediaStore.Images.Media.DATA};    Cursor cursor = managedQuery(photoUri, pojo, null, null, null);    if (cursor != null) {     int columnIndex = cursor.getColumnIndexOrThrow(pojo[0]);     cursor.moveToFirst();     picPath = cursor.getString(columnIndex);     if (Build.VERSION.SDK_INT < 14) {      cursor.close();     }    }    if (picPath != null) {     photoUri = Uri.fromFile(new File(picPath));     startPhotoZoom(photoUri, PHOTO_CROP_CODE);    } else {     Toast.makeText(this, "图片选择失败", Toast.LENGTH_LONG).show();    }   } else if (requestCode == PHOTO_CROP_CODE) {    if (photoUri != null) {     Bitmap bitmap = BitmapFactory.decodeFile(picPath);     if (bitmap != null) {      //这里可以把图片进行上传到服务器操作      photo_iv.setImageBitmap(bitmap);     }    }   }  } } /**  * @param  * @description 裁剪图片  * @author ldm  * @time 2016/11/30 15:19  */ private void startPhotoZoom(Uri uri, int REQUE_CODE_CROP) {  Intent intent = new Intent("com.android.camera.action.CROP");  intent.setDataAndType(uri, "image/*");  // crop=true是设置在开启的Intent中设置显示的VIEW可裁剪  intent.putExtra("crop", "true");  // 去黑边  intent.putExtra("scale", true);  intent.putExtra("scaleUpIfNeeded", true);  // aspectX aspectY 是宽高的比例，根据自己情况修改  intent.putExtra("aspectX", 3);  intent.putExtra("aspectY", 2);  // outputX outputY 是裁剪图片宽高像素  intent.putExtra("outputX", 600);  intent.putExtra("outputY", 400);  intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());  //取消人脸识别功能  intent.putExtra("noFaceDetection", true);  //设置返回的uri  intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);  //设置为不返回数据  intent.putExtra("return-data", false);  startActivityForResult(intent, REQUE_CODE_CROP); } /**  * @param  * @description 把Uri转换为文件路径  * @author ldm  * @time 2016/11/30 15:22  */ private String uriToFilePath(Uri uri) {  //获取图片数据  String[] proj = {MediaStore.Images.Media.DATA};  //查询  Cursor cursor = managedQuery(uri, proj, null, null, null);  //获得用户选择的图片的索引值  int image_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);  cursor.moveToFirst();  //返回图片路径  return cursor.getString(image_index); }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    android:padding="16dp"> <Button  android:id="@+id/take_photo_btn"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_marginTop="20dp"  android:gravity="center"  android:text="拍照"  android:textSize="16sp"/> <Button  android:id="@+id/select_photo_btn"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_marginTop="20dp"  android:gravity="center"  android:text="选择图片"  android:textSize="16sp"/> <ImageView  android:id="@+id/photo_iv"  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:layout_gravity="center_horizontal"  android:layout_marginTop="20dp"/></LinearLayout>

<uses-permission android:name="android.permission.CAMERA"/><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/><uses-permission  android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>