<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:app="http://schemas.android.com/apk/res-auto"  xmlns:tools="http://schemas.android.com/tools"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical"  tools:context="com.example.leixiansheng.cutphoto.MainActivity">   <Button    android:id="@+id/btn_select_from_local"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:text="cut"/>   <ImageView    android:id="@+id/iv_local"    android:layout_gravity="center_horizontal"    android:layout_width="wrap_content"    android:layout_height="wrap_content" /></LinearLayout>

package com.example.leixiansheng.cutphoto; import android.Manifest;import android.annotation.SuppressLint;import android.content.Intent;import android.content.pm.PackageManager;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.net.Uri;import android.os.Environment;import android.os.StrictMode;import android.provider.MediaStore;import android.support.annotation.NonNull;import android.support.v4.app.ActivityCompat;import android.support.v4.content.ContextCompat;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.ImageView;import android.widget.Toast; import java.io.FileNotFoundException;import java.util.ArrayList;import java.util.List; import butterknife.BindView;import butterknife.ButterKnife;import butterknife.OnClick; public class MainActivity extends AppCompatActivity {  @BindView(R.id.btn_select_from_local) Button mBtnSelectFromLocal; @BindView(R.id.btn_take_photo) Button mBtnTake; @BindView(R.id.iv_local) ImageView mIvLocal;  private static final String TAG = MainActivity.class.getSimpleName(); private static final String IMAGE_FILE_LOCATION = "file:///" + Environment.getExternalStorageDirectory().getPath() + "/temp.jpg"; private static final int CHOOSE_PICTURE = 1; private static final int CROP_PICTURE = 2; private static final int REQUEST_CODE_OK = 3; private static final int TAKE_PHOTO = 4;  private Uri imageUri = Uri.parse(IMAGE_FILE_LOCATION); private PermissionListener mListener;   @SuppressLint("NewApi") @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ButterKnife.bind(this); // android 7.0系統解決拍照的問題 StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder(); StrictMode.setVmPolicy(builder.build()); builder.detectFileUriExposure(); }  @OnClick({R.id.btn_select_from_local, R.id.btn_take_photo}) public void onClick(final View view) { requestRunTimePermission(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE,  Manifest.permission.CAMERA}, new PermissionListener() {  @Override  public void onGranted() {  switch (view.getId()) {   case R.id.btn_select_from_local:   selectFromLocal();   break;   case R.id.btn_take_photo:   takePhoto();   break;  }  }   @Override  public void onDenied(List<String> deniedPermission) {  Toast.makeText(MainActivity.this, "權限不足", Toast.LENGTH_SHORT).show();  } }); }  /** * 啟動系相機 */ private void takePhoto() { Intent intent = new Intent("android.media.action.IMAGE_CAPTURE"); intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri); //啟動相機（帶返回結果） startActivityForResult(intent, TAKE_PHOTO); }  /** * 啟動系統圖片選擇 */ private void selectFromLocal() { Intent intent = new Intent(Intent.ACTION_PICK, null); intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*"); //返回數據為被選照片的Uri startActivityForResult(intent, CHOOSE_PICTURE); }  @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); Log.d(TAG, resultCode + ""); if (resultCode == RESULT_OK) {  switch (requestCode) {  case CHOOSE_PICTURE:   startPhotoZoom(data.getData());   break;  case CROP_PICTURE: // 取得裁剪后的圖片   try {   mIvLocal.setImageBitmap(BitmapFactory.decodeStream( getContentResolver().openInputStream(imageUri) ));   } catch (FileNotFoundException e) {   e.printStackTrace();   }   break;  case TAKE_PHOTO:   startPhotoZoom(imageUri);   break;  default:   break;  } } }  /** * 設置裁剪參數，開始裁剪 * @param uri */ public void startPhotoZoom(Uri uri) { Intent intent = new Intent("com.android.camera.action.CROP"); intent.setDataAndType(uri, "image/*"); // 下面這個crop=true是設置在開啟的Intent中設置顯示的VIEW可裁剪 intent.putExtra("crop", "true"); intent.putExtra("scale", true);  intent.putExtra("aspectX", 2); //裁剪框 X 比值 intent.putExtra("aspectY", 1); //裁剪框 Y 比值  intent.putExtra("outputX", 600); //裁剪后輸出寬度 intent.putExtra("outputY", 300); //裁剪后輸出高度  intent.putExtra("return-data", false); intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri); //輸出路徑 intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString()); intent.putExtra("noFaceDetection", true); // no face detection  startActivityForResult(intent, CROP_PICTURE); }  /** * 動態權限請求 * * @param permissions */ public void requestRunTimePermission(String[] permissions, PermissionListener listener) { mListener = listener; List<String> permissionList = new ArrayList<>(); for (String permission : permissions) {  if (ContextCompat.checkSelfPermission(this, permission) != PackageManager.PERMISSION_GRANTED) {//檢測當前權限是否已經被允許  permissionList.add(permission);//沒有則添加進集合  } } if (!permissionList.isEmpty()) {//檢測權限集合中是否有未申請的權限  ActivityCompat.requestPermissions(this, permissionList.toArray(new String[permissionList.size()]), REQUEST_CODE_OK); } else {  //所有權限都通過了  mListener.onGranted(); } }  @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); switch (requestCode) {  case REQUEST_CODE_OK:  if (grantResults.length > 0) {   List<String> deniedPermission = new ArrayList<>();   for (int i = 0; i < grantResults.length; i++) {   int grantResult = grantResults[i];   String permission = permissions[i];   if (grantResult != PackageManager.PERMISSION_GRANTED) {    deniedPermission.add(permission);   }   }    if (!deniedPermission.isEmpty()) {   mListener.onDenied(deniedPermission);   } else   mListener.onGranted();  }  break;  default:   break; } }}