帮我看一下，我的代码有什么问题吗？照片怎么才能存进相册？

Question

package com.example.shiyan8;import android.Manifest;
import android.annotation.TargetApi;
import android.content.ContentUris;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.provider.DocumentsContract;
import android.provider.MediaStore;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.content.FileProvider;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;public class MainActivity extends AppCompatActivity {
    public static final int TAKE_PHOTO = 1;    public static final int CHOOSE_PHOTO = 2;    private ImageView picture;    private Uri imageUri;    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button takePhoto = (Button) findViewById(R.id.take_photo);
        Button chooseFromAlbum = (Button) findViewById(R.id.choose_from_album);
        picture = (ImageView) findViewById(R.id.picture);
        takePhoto.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                File outputImage = new File(getExternalCacheDir(), "output_image.jpg");
                try {
                    if (outputImage.exists()) {
                        outputImage.delete();
                    }
                    outputImage.createNewFile();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (Build.VERSION.SDK_INT < 21){
                    imageUri = Uri.fromFile(outputImage);
                } else {
                    imageUri = FileProvider.getUriForFile(MainActivity.this, "com.example.shiyan8.fileprovider", outputImage);
                }
                Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
                intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
                startActivityForResult(intent, TAKE_PHOTO);
            }
        });
        chooseFromAlbum.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                    ActivityCompat.requestPermissions(MainActivity.this, new String[]{ Manifest.permission. WRITE_EXTERNAL_STORAGE }, 1);
                } else {
                    openAlbum();
                }
            }
        });
    }    private void openAlbum() {
        Intent intent = new Intent("android.intent.action.GET_CONTENT");
        intent.setType("image/*");
        startActivityForResult(intent, CHOOSE_PHOTO);
    }    @Override
    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
        switch (requestCode) {
            case 1:
                if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    openAlbum();
                } else {
                    Toast.makeText(this, "You denied the permission", Toast.LENGTH_SHORT).show();
                }
                break;
            default:
        }
    }    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case TAKE_PHOTO:
                if (resultCode == RESULT_OK) {
                    try {
                        Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));
                        picture.setImageBitmap(bitmap);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
                break;
            case CHOOSE_PHOTO:
                if (resultCode == RESULT_OK) {
                    if (Build.VERSION.SDK_INT >= 19) {
                        handleImageOnKitKat(data);
                    } else {
                        handleImageBeforeKitKat(data);
                    }
                }
                break;
            default:
                break;
        }
    }    @TargetApi(19)
    private void handleImageOnKitKat(Intent data) {
        String imagePath = null;
        Uri uri = data.getData();
        Log.d("TAG", "handleImageOnKitKat: uri is " + uri);
        if (DocumentsContract.isDocumentUri(this, uri)) {
            String docId = DocumentsContract.getDocumentId(uri);
            if("com.android.providers.media.documents".equals(uri.getAuthority())) {
                String id = docId.split(":")[1];
                String selection = MediaStore.Images.Media._ID + "=" + id;
                imagePath = getImagePath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, selection);
            } else if ("com.android.providers.downloads.documents".equals(uri.getAuthority())) {
                Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(docId));
                imagePath = getImagePath(contentUri, null);
            }
        } else if ("content".equalsIgnoreCase(uri.getScheme())) {
            imagePath = getImagePath(uri, null);
        } else if ("file".equalsIgnoreCase(uri.getScheme())) {
            imagePath = uri.getPath();
        }
        displayImage(imagePath);
    }    private void handleImageBeforeKitKat(Intent data) {
        Uri uri = data.getData();
        String imagePath = getImagePath(uri, null);
        displayImage(imagePath);
    }    private String getImagePath(Uri uri, String selection) {
        String path = null;
        Cursor cursor = getContentResolver().query(uri, null, selection, null, null);
        if (cursor != null) {
            if (cursor.moveToFirst()) {
                path = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
            }
            cursor.close();
        }
        return path;
    }    private void displayImage(String imagePath) {
        if (imagePath != null) {
            Bitmap bitmap = BitmapFactory.decodeFile(imagePath);
            picture.setImageBitmap(bitmap);
        } else {
            Toast.makeText(this, "failed to get image", Toast.LENGTH_SHORT).show();
        }
    }}
这是我的日志：
2019-05-13 09:23:29.086 12170-12170/? I/example.shiyan: Not late-enabling -Xcheck:jni (already on)
2019-05-13 09:23:29.144 12170-12170/? W/example.shiyan: Unexpected CPU variant for X86 using defaults: x86
2019-05-13 09:23:29.578 12170-12170/com.example.shiyan8 W/example.shiyan: JIT profile information will not be recorded: profile file does not exits.
2019-05-13 09:23:29.580 12170-12170/com.example.shiyan8 I/chatty: uid=10087(com.example.shiyan8) identical 10 lines
2019-05-13 09:23:29.580 12170-12170/com.example.shiyan8 W/example.shiyan: JIT profile information will not be recorded: profile file does not exits.
2019-05-13 09:23:29.849 12170-12170/com.example.shiyan8 I/InstantRun: starting instant run server: is main process
2019-05-13 09:23:30.700 12170-12170/com.example.shiyan8 W/example.shiyan: Verification of android.support.v4.app.Fragment$SavedState android.support.v4.app.FragmentManagerImpl.saveFragmentInstanceState(android.support.v4.app.Fragment) took 157.440ms
2019-05-13 09:23:31.052 12170-12170/com.example.shiyan8 W/example.shiyan: Accessing hidden method Landroid/view/View;->computeFitSystemWindows(Landroid/graphics/Rect;Landroid/graphics/Rect;)Z (light greylist, reflection)
2019-05-13 09:23:31.054 12170-12170/com.example.shiyan8 W/example.shiyan: Accessing hidden method Landroid/view/ViewGroup;->makeOptionalFitsSystemWindows()V (light greylist, reflection)
2019-05-13 09:23:31.177 12170-12170/com.example.shiyan8 D/OpenGLRenderer: HWUI GL Pipeline
2019-05-13 09:23:31.477 12170-12188/com.example.shiyan8 I/ConfigStore: android::hardware::configstore::V1_0::ISurfaceFlingerConfigs::hasWideColorDisplay retrieved: 0
2019-05-13 09:23:31.477 12170-12188/com.example.shiyan8 I/ConfigStore: android::hardware::configstore::V1_0::ISurfaceFlingerConfigs::hasHDRDisplay retrieved: 0
2019-05-13 09:23:31.478 12170-12188/com.example.shiyan8 I/OpenGLRenderer: Initialized EGL, version 1.4
2019-05-13 09:23:31.478 12170-12188/com.example.shiyan8 D/OpenGLRenderer: Swap behavior 1
2019-05-13 09:23:31.479 12170-12188/com.example.shiyan8 W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
2019-05-13 09:23:31.479 12170-12188/com.example.shiyan8 D/OpenGLRenderer: Swap behavior 0
2019-05-13 09:23:31.550 12170-12188/com.example.shiyan8 D/EGL_emulation: eglCreateContext: 0xec4052a0: maj 2 min 0 rcv 2
2019-05-13 09:23:32.142 12170-12188/com.example.shiyan8 D/EGL_emulation: eglMakeCurrent: 0xec4052a0: ver 2 0 (tinfo 0xec4032c0)
2019-05-13 09:23:32.283 12170-12170/com.example.shiyan8 I/Choreographer: Skipped 53 frames!  The application may be doing too much work on its main thread.
2019-05-13 09:23:32.297 12170-12188/com.example.shiyan8 D/EGL_emulation: eglMakeCurrent: 0xec4052a0: ver 2 0 (tinfo 0xec4032c0)
2019-05-13 09:23:32.582 12170-12188/com.example.shiyan8 I/OpenGLRenderer: Davey! duration=1189ms; Flags=0, IntendedVsync=5796248859503, Vsy

Answer 1

   //更新图库
    public static void updatePhotoMedia(File file ,Context context){
//        Intent intent = new Intent();
//        intent.setAction(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
//        intent.setData(Uri.fromFile(file));
//        context.sendBroadcast(intent);        // 其次把文件插入到系统图库
        try {
            MediaStore.Images.Media.insertImage(context.getContentResolver(),
                    file.getAbsolutePath(), file.getName(), null);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        // 最后通知图库更新
//        context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + path)));
        context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.fromFile(new File(file.getPath()))));
    }