如何将图像保存到加载了 Glide 的本地存储中？

Question

我有一个ImageView从服务器加载照片到它的Glide库。我有一个save按钮，我希望在加载后单击时将图像保存到图库和内部存储中。我尝试了几种可能性，但没有成功，因为单击按钮后似乎什么也没有发生。

    public class ImagePreviewActivity extends AppCompatActivity {
    ImageView imageView;
    final File myDir = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/SmartPhoto"); 
   boolean success = false;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_image_preview);
        imageView  = findViewById(R.id.image_preview);
     saveImage();

    }

    private void saveImage() {
        TextView mSave = findViewById(R.id.save_img);
        mSave.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final Random generator = new Random();
                int n = 10000;
                n = generator.nextInt(n);
                final String fname = "image" + n + ".png";
                myDir.mkdirs();
                File image = new File(myDir, fname);
                imageView.setDrawingCacheEnabled(true);
                Bitmap bitmap = imageView.getDrawingCache();
                // Encode the file as a PNG image.
                FileOutputStream outStream;
                try {
                    outStream = new FileOutputStream(image);
                    bitmap.compress(Bitmap.CompressFormat.PNG, 100, outStream);
                    /* 100 to keep full quality of the image */
                    outStream.flush();
                    outStream.close();
                    success = true;
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }

                if (success) {
                    Toast.makeText(getApplicationContext(),"Saved", Toast.LENGTH_LONG).show();
                } else {
                    Toast.makeText(getApplicationContext(),"not saved", Toast.LENGTH_LONG).show();
                }
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                    final Intent scanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
                    final Uri contentUri = Uri.fromFile(image);
                    scanIntent.setData(contentUri);
                    sendBroadcast(scanIntent);
                } else {
                    sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://mnt/sdcard/" + Environment.getExternalStorageDirectory())));
                }
            }

        });

    }
}

原木猫

02-24 14:40:41.288 1567-1575/? E/System: Uncaught exception thrown by finalizer
02-24 14:40:41.289 1567-1575/? E/System: java.lang.IllegalStateException: Binder has been finalized!
                                             at android.os.BinderProxy.transactNative(Native Method)
                                             at android.os.BinderProxy.transact(Binder.java:622)
                                             at android.net.INetworkStatsSession$Stub$Proxy.close(INetworkStatsSession.java:476)
                                             at android.app.usage.NetworkStats.close(NetworkStats.java:382)
                                             at android.app.usage.NetworkStats.finalize(NetworkStats.java:118)
                                             at java.lang.Daemons$FinalizerDaemon.doFinalize(Daemons.java:223)
                                             at java.lang.Daemons$FinalizerDaemon.run(Daemons.java:210)
                                             at java.lang.Thread.run(Thread.java:761)

Answer 1

//out oncreate
    final File myDir = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/SmartPhoto");
    boolean success = false;


    //inside oncreate
      mSave = (TextView) findViewById(R.id.save);
        imageView  = (ImageView) findViewById(R.id.header_cover_image);

        mSave.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view)
            {
                saveImage();
            }
        });


    public void saveImage()
    {
                final Random generator = new Random();
                int n = 10000;
                n = generator.nextInt(n);
                final String fname = "image" + n + ".png";
                myDir.mkdirs();
                File image = new File(myDir, fname);
                imageView.setDrawingCacheEnabled(true);
                Bitmap bitmap = imageView.getDrawingCache();
                // Encode the file as a PNG image.
                FileOutputStream outStream;
                try {
                    outStream = new FileOutputStream(image);
                    bitmap.compress(Bitmap.CompressFormat.PNG, 100, outStream);
                    /* 100 to keep full quality of the image */
                    outStream.flush();
                    outStream.close();
                    success = true;
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (success) {
                    Toast.makeText(getApplicationContext(),"Saved", Toast.LENGTH_LONG).show();
                } else {
                    Toast.makeText(getApplicationContext(),"not saved", Toast.LENGTH_LONG).show();
                }
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
            final Intent scanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
            final Uri contentUri = Uri.fromFile(image);
            scanIntent.setData(contentUri);
            sendBroadcast(scanIntent);
        } else {
            sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://mnt/sdcard/" + Environment.getExternalStorageDirectory())));
        }
            }