Android跳转系统相机或相册获取图片

public class MainActivity extends Activity { private static final int PHOTO_REQUEST_CAREMA = 1;// 拍照   private static final int PHOTO_REQUEST_GALLERY = 2;// 从相册中选择 private static final int PHOTO_REQUEST_CUT = 3;// 结果private ImageView iv_image; /* 头像名称 */ private static final String PHOTO_FILE_NAME = "temp_photo.jpg"; private File tempFile; @Override protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);  this.iv_image = (ImageView) this.findViewById(R.id.iv_image); }   /*  * 从相册获取  */public void gallery(View view) {     // 激活系统图库，选择一张图片     Intent intent = new Intent(Intent.ACTION_PICK);     intent.setType("image/*");    // 开启一个带有返回值的Activity，请求码为PHOTO_REQUEST_GALLERY      startActivityForResult(intent, PHOTO_REQUEST_GALLERY); } /* * 从相机获取  */ public void camera(View view) {     // 激活相机     Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");   // 判断存储卡是否可以用，可用进行存储    if (hasSdcard()) {       tempFile = new File(Environment.getExternalStorageDirectory(),                PHOTO_FILE_NAME);       // 从文件中创建uri      Uri uri = Uri.fromFile(tempFile);       intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);    }    // 开启一个带有返回值的Activity，请求码为PHOTO_REQUEST_CAREMA    startActivityForResult(intent, PHOTO_REQUEST_CAREMA); } /*  * 剪切图片 */private void crop(Uri uri) {    // 裁剪图片意图    Intent intent = new Intent("com.android.camera.action.CROP");   intent.setDataAndType(uri, "image/*");    intent.putExtra("crop", "true");     // 裁剪框的比例，1：1     intent.putExtra("aspectX", 1);      intent.putExtra("aspectY", 1);     // 裁剪后输出图片的尺寸大小     intent.putExtra("outputX", 250);      intent.putExtra("outputY", 250);   intent.putExtra("outputFormat", "JPEG");// 图片格式     intent.putExtra("noFaceDetection", true);// 取消人脸识别     intent.putExtra("return-data", true);      // 开启一个带有返回值的Activity，请求码为PHOTO_REQUEST_CUT     startActivityForResult(intent, PHOTO_REQUEST_CUT); } /*  * 判断sdcard是否被挂载  */ private boolean hasSdcard() {     if (Environment.getExternalStorageState().equals(             Environment.MEDIA_MOUNTED)) {        return true;     } else {        return false;     } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) {     if (requestCode == PHOTO_REQUEST_GALLERY) {         // 从相册返回的数据         if (data != null) {             // 得到图片的全路径             Uri uri = data.getData();            crop(uri);         }    } else if (requestCode == PHOTO_REQUEST_CAREMA) {         // 从相机返回的数据         if (hasSdcard()) {            crop(Uri.fromFile(tempFile));         } else {             Toast.makeText(MainActivity.this, "未找到存储卡，无法存储照片！", 0).show();         }   } else if (requestCode == PHOTO_REQUEST_CUT) {         // 从剪切图片返回的数据         if (data != null) {            Bitmap bitmap = data.getParcelableExtra("data");           this.iv_image.setImageBitmap(bitmap);       }         try {           // 将临时文件删除            tempFile.delete();        } catch (Exception e) {             e.printStackTrace();         }   }    super.onActivityResult(requestCode, resultCode, data); } }
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