Android调用系统图片裁剪限定尺寸及7.0照相问题的解决方法

<?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系统解决拍照的问题
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, "权限不足", Toast.LENGTH_SHORT).show();
}
});
}
/**
* 启动系相机
*/
private void takePhoto() {
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
//启动相机（带返回结果）
startActivityForResult(intent, TAKE_PHOTO);
}
/**
* 启动系统图片选择
*/
private void selectFromLocal() {
Intent intent = new Intent(Intent.ACTION_PICK, null);
intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*"); //返回数据为被选照片的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: // 取得裁剪后的图片
try {
mIvLocal.setImageBitmap(BitmapFactory.decodeStream( getContentResolver().openInputStream(imageUri) ));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
break;
case TAKE_PHOTO:
startPhotoZoom(imageUri);
break;
default:
break;
}
}
}
/**
* 设置裁剪参数，开始裁剪
* @param uri
*/
public void startPhotoZoom(Uri uri) {
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/*");
// 下面这个crop=true是设置在开启的Intent中设置显示的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); //裁剪后输出宽度
intent.putExtra("outputY", 300); //裁剪后输出高度
intent.putExtra("return-data", false);
intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri); //输出路径
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
intent.putExtra("noFaceDetection", true); // no face detection
startActivityForResult(intent, CROP_PICTURE);
}
/**
* 动态权限请求
*
* @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) {//检测当前权限是否已经被允许
permissionList.add(permission);//没有则添加进集合
}
}
if (!permissionList.isEmpty()) {//检测权限集合中是否有未申请的权限
ActivityCompat.requestPermissions(this, permissionList.toArray(new String[permissionList.size()]), REQUEST_CODE_OK);
} else {
//所有权限都通过了
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;
}
}
}