Question

我使用NSJsonSerializer适配器创建了extension String { func indexOf(target: String) -> Int { if let range = self.rangeOfString(target) { return self.startIndex.distanceTo(range.startIndex) } else { return -1 } } func indexOf(target: String, startIndex: Int) -> Int { let startRange = self.startIndex.advancedBy(startIndex) if let range = self.rangeOfString(target, options: .LiteralSearch, range: startRange..<self.endIndex) { return self.startIndex.distanceTo(range.startIndex) } else { return -1 } } } let end = myString.indexOf("{", startIndex: myString.indexOf("{") + 1) MainActivity，我使用了4 Tablayout Home_Fragment， News_Fragment， Video_Fragment， PodCast_Fragment， More_Fragment， tablayout正常工作...... 但是如何仅在Home_Fragment中创建Bottombar？

我点这个链接：https://github.com/pocheshire/BottomNavigationBar 我正在获取所有片段的底栏

我只想在home_fragment ???

中使用bottombar 我尝试了很多但没有得到。

Answer 1

尝试这种方法，删除MainActivity中的onCreateOptionsMenu并为HomeFragment创建onCreateOptionsMenu（），例如，

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {

// TODO Add your menu entries here
inflater.inflate(R.menu.menu, menu);
super.onCreateOptionsMenu(menu, inflater);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.YOUR_ITEM_1:
    // do stuff here
    break;

case R.id.YOUR_ITEM_2:
     // do stuff here
    break;
}
return true;

}

然后输入以下代码，

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}

到你的HomeFragment.java

这可能有助于你

Answer 2

public class Cam_View extends Activity implements SurfaceHolder.Callback {

    protected static final int CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE = 0;
    private SurfaceView SurView;
    private SurfaceHolder camHolder;
    private boolean previewRunning;
    final Context context = this;
    public static Camera camera = null;
    private RelativeLayout CamView;
    private Bitmap inputBMP = null, bmp, bmp1;
    private ImageView mImage,camera_image;


    @SuppressWarnings("deprecation")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.testscreenshot);

        CamView = (RelativeLayout) findViewById(R.id.camview);//RELATIVELAYOUT OR 
                                                              //ANY LAYOUT OF YOUR XML

        SurView = (SurfaceView)findViewById(R.id.sview);//SURFACEVIEW FOR THE PREVIEW 
                                                        //OF THE CAMERA FEED
        camHolder = SurView.getHolder();                           //NEEDED FOR THE PREVIEW
        camHolder.addCallback(this);                               //NEEDED FOR THE PREVIEW
        camHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);//NEEDED FOR THE PREVIEW
        camera_image = (ImageView) findViewById(R.id.camera_image);//NEEDED FOR THE PREVIEW

        Button btn = (Button) findViewById(R.id.button1); //THE BUTTON FOR TAKING PICTURE

        btn.setOnClickListener(new OnClickListener() {    //THE BUTTON CODE
            public void onClick(View v) {
            camera.takePicture(null, null, mPicture);//TAKING THE PICTURE
                                                         //THE mPicture IS CALLED 
                                                         //WHICH IS THE LAST METHOD(SEE BELOW)

            }

        });
    }

    public Bitmap screenShot(View view) {
        Bitmap bitmap = Bitmap.createBitmap(view.getWidth(),
                view.getHeight(), Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        view.draw(canvas);
        return bitmap;
    }

    private void openScreenshot(File imageFile) {
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_VIEW);
        Uri uri = Uri.fromFile(imageFile);
        intent.setDataAndType(uri, "image/*");
        startActivity(intent);
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width,//NEEDED FOR THE PREVIEW
        int height) {
        if(previewRunning) {
            camera.stopPreview();
        }
        Camera.Parameters camParams = camera.getParameters();
        Camera.Size size = camParams.getSupportedPreviewSizes().get(0);
        camParams.setPreviewSize(size.width, size.height);
        camera.setParameters(camParams);
        try {
            camera.setPreviewDisplay(holder);
            camera.startPreview();
            previewRunning=true;
        } catch(IOException e) {
            e.printStackTrace();
        }
    }

    public void surfaceCreated(SurfaceHolder holder) {                  //NEEDED FOR THE PREVIEW
        try {
            camera=Camera.open();
        } catch(Exception e) {
            e.printStackTrace();
            Toast.makeText(getApplicationContext(),"Error",Toast.LENGTH_LONG).show();
            finish();
        }
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {             //NEEDED FOR THE PREVIEW
        camera.stopPreview();
        camera.release();
        camera=null;
    }

    public void TakeScreenshot(){    //THIS METHOD TAKES A SCREENSHOT AND SAVES IT AS .jpg

        CamView.setDrawingCacheEnabled(true);
        CamView.buildDrawingCache(true);

                        Bitmap b = Bitmap.createBitmap(CamView.getDrawingCache());
                        System.out.println("b====================="+b);
                        CamView.setDrawingCacheEnabled(false);


                        //Save bitmap to ur sdcard

                        File mFolder = new File( Environment.getExternalStorageDirectory().toString()+ "/xxx");
                        File mCapture = new File( mFolder.getAbsolutePath()+ "/Captured");

                        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss_SSS");
                        String dateString = formatter.format(new java.util.Date());

                        String fileName = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss_SSS'_xxx.jpg'").format(new Date());
                        File imgFile = new File(mCapture.getAbsolutePath(), fileName);

                        String extr = Environment.getExternalStorageDirectory().toString() +   File.separator + "xxx/Captured";

                        FileOutputStream fos = null;
                        try {
                            if (!mFolder.exists()) {
                                mFolder.mkdir();
                            }
                            if (!mCapture.exists()) {
                                mCapture.mkdir();
                            }
                            if (!imgFile.exists()) {
                                imgFile.createNewFile();
                            }
                            fos = new FileOutputStream(imgFile);
                            b.compress(Bitmap.CompressFormat.PNG, 100, fos);
                            fos.flush();
                            fos.close();
                            MediaStore.Images.Media.insertImage(Cam_View.this.getContentResolver(), b, "Screen", "screen");
                        }catch (FileNotFoundException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        } catch (Exception e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }



                        final Intent shareIntent = new Intent(Intent.ACTION_SEND);
                        shareIntent.setType("image/jpg");
                        final File photoFile = new File(extr,fileName);
                        shareIntent.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(photoFile));
                        startActivity(Intent.createChooser(shareIntent, "Share image using"));


    }

    private PictureCallback mPicture = new PictureCallback() {   //THIS METHOD AND THE METHOD BELOW
                                 //CONVERT THE CAPTURED IMAGE IN A JPG FILE AND SAVE IT

        @Override
        public void onPictureTaken(byte[] data, Camera camera) {

            File dir_image2 = new  File(Environment.getExternalStorageDirectory()+
                            File.separator+"Ultimate Entity Detector");
            dir_image2.mkdirs();  //AGAIN CHOOSING FOLDER FOR THE PICTURE(WHICH IS LIKE A SURFACEVIEW
                                  //SCREENSHOT)

            File tmpFile = new File(dir_image2,"TempGhost.jpg"); //MAKING A FILE IN THE PATH
                            //dir_image2(SEE RIGHT ABOVE) AND NAMING IT "TempGhost.jpg" OR ANYTHING ELSE
            try { //SAVING
                FileOutputStream fos = new FileOutputStream(tmpFile);
                fos.write(data);
                fos.close();
                //grabImage();
            } catch (FileNotFoundException e) {
                Toast.makeText(getApplicationContext(),"Error",Toast.LENGTH_LONG).show();
            } catch (IOException e) {
                Toast.makeText(getApplicationContext(),"Error",Toast.LENGTH_LONG).show();
            }

            String path = (Environment.getExternalStorageDirectory()+
                            File.separator+"Ultimate EntityDetector"+
                                                File.separator+"TempGhost.jpg");//<---

            BitmapFactory.Options options = new BitmapFactory.Options();//<---
                options.inPreferredConfig = Bitmap.Config.ARGB_8888;//<---
            bmp1 = BitmapFactory.decodeFile(path, options);//<---     *********(SEE BELOW)
            //THE LINES ABOVE READ THE FILE WE SAVED BEFORE AND CONVERT IT INTO A BitMap
            camera_image.setImageBitmap(bmp1); //SETTING THE BitMap AS IMAGE IN AN IMAGEVIEW(SOMETHING
                                        //LIKE A BACKGROUNG FOR THE LAYOUT)

            tmpFile.delete();
            TakeScreenshot();//CALLING THIS METHOD TO TAKE A SCREENSHOT
            //********* THAT LINE MIGHT CAUSE A CRASH ON SOME PHONES (LIKE XPERIA T)<----(SEE HERE)
            //IF THAT HAPPENDS USE THE LINE "bmp1 =decodeFile(tmpFile);" WITH THE METHOD BELOW

        }
    };

    public Bitmap decodeFile(File f) {  //FUNCTION BY Arshad Parwez
        Bitmap b = null;
        try {
            // Decode image size
            BitmapFactory.Options o = new BitmapFactory.Options();
            o.inJustDecodeBounds = true;

            FileInputStream fis = new FileInputStream(f);
            BitmapFactory.decodeStream(fis, null, o);
            fis.close();
            int IMAGE_MAX_SIZE = 1000;
            int scale = 1;
            if (o.outHeight > IMAGE_MAX_SIZE || o.outWidth > IMAGE_MAX_SIZE) {
                scale = (int) Math.pow(
                        2,
                        (int) Math.round(Math.log(IMAGE_MAX_SIZE
                                / (double) Math.max(o.outHeight, o.outWidth))
                                / Math.log(0.5)));
            }

            // Decode with inSampleSize
            BitmapFactory.Options o2 = new BitmapFactory.Options();
            o2.inSampleSize = scale;
            fis = new FileInputStream(f);
            b = BitmapFactory.decodeStream(fis, null, o2);
            fis.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return b;
    }
}

Answer 3

为什么你没有尝试将BottomBar附加到View？

BottomBar包含public static BottomBar Attach(View view, Bundle savedInstanceState)，提供您需要的功能。

所以，在你home_fragment中插入OnCreate方法中的代码：

_bottomBar = BottomBar.Attach(containerView, savedInstanceState);

或在Java中

bottomBar = BottomBar.attach(containerView, savedInstanceState);

如何在片段中创建BottomBar？

3 个答案: