<?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(tǒng)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(quán)限不足", Toast.LENGTH_SHORT).show();
  }
 });
 }
 
 /**
 * 啟動系相機(jī)
 */
 private void takePhoto() {
 Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
 intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
 //啟動相機(jī)（帶返回結(jié)果）
 startActivityForResult(intent, TAKE_PHOTO);
 }
 
 /**
 * 啟動系統(tǒng)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(shù)據(jù)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(shè)置裁剪參數(shù)，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(shè)置在開啟的Intent中設(shè)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(tài)權(quán)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(dāng)前權(quán)限是否已經(jīng)被允許
  permissionList.add(permission);//沒有則添加進(jìn)集合
  }
 }
 if (!permissionList.isEmpty()) {//檢測權(quán)限集合中是否有未申請的權(quán)限
  ActivityCompat.requestPermissions(this, permissionList.toArray(new String[permissionList.size()]), REQUEST_CODE_OK);
 } else {
  //所有權(quán)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;
 }
 }
}