Android ------ 拍照相册选择图片 剪裁图片
16lz
2021-01-23
<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" android:paddingBottom="16dp" android:paddingLeft="16dp" android:paddingRight="16dp" android:paddingTop="16dp" tools:context=".MainActivity" > <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginLeft="38dp" android:layout_marginTop="46dp" android:text="Button" /> <ImageView android:id="@+id/imageView" android:layout_width="300dp" android:layout_height="300dp" android:layout_below="@+id/button1" android:layout_centerHorizontal="true" /></RelativeLayout>
public class MainActivity extends Activity implements View.OnClickListener { private Button button1; private ImageView imageView; private File tempFile = new File(Environment.getExternalStorageDirectory(), getPhotoFileName()); private File sdcardTempFile; private AlertDialog dialog; private int crop = 300; //private static final int PHOTO_REQUEST_CUT = 3;// 结果 @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // 显示图片 imageView = (ImageView) findViewById(R.id.imageView); // 点击按钮，选择图片或者拍照 button1 = (Button) findViewById(R.id.button1); button1.setOnClickListener((OnClickListener) this); sdcardTempFile = new File("/mnt/sdcard/", "tmp_pic_" + SystemClock.currentThreadTimeMillis() + ".jpg"); } @Override public void onClick(View v) { if (v == button1) { if (dialog == null) { dialog = new AlertDialog.Builder(this).setItems( new String[] { "相机", "相册" }, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { if (which == 0) { // 选择拍照 Intent cameraintent = new Intent( MediaStore.ACTION_IMAGE_CAPTURE); // 指定调用相机拍照后照片的储存路径 cameraintent.putExtra( MediaStore.EXTRA_OUTPUT, Uri.fromFile(tempFile)); startActivityForResult(cameraintent, 101); } else { Intent intent = new Intent( "android.intent.action.PICK"); intent.setDataAndType( MediaStore.Images.Media.INTERNAL_CONTENT_URI, "image/*"); intent.putExtra("output", Uri.fromFile(sdcardTempFile)); intent.putExtra("crop", "true"); intent.putExtra("aspectX", 1);// 裁剪框比例 intent.putExtra("aspectY", 1); intent.putExtra("outputX", crop);// 输出图片大小 intent.putExtra("outputY", crop); startActivityForResult(intent, 100); } } }).create(); } if (!dialog.isShowing()) { dialog.show(); } } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == 100) { Bitmap bmp = BitmapFactory.decodeFile(sdcardTempFile .getAbsolutePath()); imageView.setImageBitmap(bmp); } else if (requestCode == 101) { // 选择拍照 startPhotoZoom(Uri.fromFile(tempFile)); } else if (requestCode == 102) { if (data != null) // setPicToView(data); sentPicToNext(data); } } private void startPhotoZoom(Uri uri) { Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(uri, "image/*"); // crop为true是设置在开启的intent中设置显示的view可以剪裁 intent.putExtra("crop", "true"); // aspectX aspectY 是宽高的比例 intent.putExtra("aspectX", 1); intent.putExtra("aspectY", 1); // outputX,outputY 是剪裁图片的宽高 intent.putExtra("outputX", 300); intent.putExtra("outputY", 300); intent.putExtra("return-data", true); intent.putExtra("noFaceDetection", true); startActivityForResult(intent, 102); } // 将进行剪裁后的图片传递到下一个界面上 private void sentPicToNext(Intent picdata) { Bundle bundle = picdata.getExtras(); if (bundle != null) { Bitmap photo = bundle.getParcelable("data"); if (photo == null) { } else { imageView.setImageBitmap(photo); } ByteArrayOutputStream baos = null; try { baos = new ByteArrayOutputStream(); // 压缩图片 photo.compress(Bitmap.CompressFormat.JPEG, 100, baos); byte[] photodata = baos.toByteArray(); System.out.println(photodata.toString()); // Intent intent = new Intent(); // intent.setClass(RegisterActivity.this, ShowActivity.class); // intent.putExtra("photo", photodata); // startActivity(intent); // finish(); } catch (Exception e) { e.getStackTrace(); } finally { if (baos != null) { try { baos.close(); } catch (Exception e) { e.printStackTrace(); } } } } } // 使用系统当前日期加以调整作为照片的名称 private String getPhotoFileName() { Date date = new Date(System.currentTimeMillis()); SimpleDateFormat dateFormat = new SimpleDateFormat( "'IMG'_yyyyMMdd_HHmmss"); return dateFormat.format(date) + ".jpg"; }}
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
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