通過意向發送位圖到下一個活動

Question

當沒有將任何位圖傳遞給下一個活動時，該意圖起作用。但是，當我試圖發送編輯位圖到下一個意圖，當我點擊'下一步'按鈕沒有任何反應。任何善良的人願意幫助我呢？

package com.example.cklim.opencv_test2; 

import android.app.Activity; 
import android.content.Context; 
import android.content.Intent; 
import android.content.res.Resources; 
import android.graphics.Color; 
import android.graphics.Paint; 
import android.graphics.PorterDuff; 
import android.graphics.PorterDuffXfermode; 
import android.os.Bundle; 
import android.util.DisplayMetrics; 
import android.view.View; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.Canvas; 
import android.view.MotionEvent; 
import android.widget.Button; 
import android.widget.RelativeLayout; 

public class MainActivity extends Activity { 

Bitmap bitmap; 
Button next; 
@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    RelativeLayout l1= new RelativeLayout(this); 
    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT); 
    params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); 
    params.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM); 
    next = new Button(this); 
    next.setText("next"); 
    next.setBackgroundColor(Color.BLACK); 
    next.setTextColor(Color.WHITE); 
    next.setLayoutParams(params); 
    l1.addView(next); 
    l1.addView(new deleteView(this)); 
    setContentView(l1); 
    next.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      Intent i = new Intent(MainActivity.this,display.class); 
      i.putExtra("BitmapImage", bitmap); 
      startActivity(i); 

     } 
    }); 
} 

class deleteView extends View { 

    // initial variables 
    int xLoc,yLoc,r = 0; 
    Paint p; 
    Canvas pcanvas; 

    public deleteView(Context context) { 
     super(context); 
     setFocusable(true); 
     // sets to transparent whenever user touches any location of image 
     setBackgroundColor(Color.TRANSPARENT); 

     // sets the paint 
     p = new Paint(); 
     p.setAlpha(0); 
     // image processing with DST_in mode 
     p.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN)); 
     p.setAntiAlias(true); 

     // get phone display's details 
     Resources r = this.getContext().getResources(); 
     DisplayMetrics metrics = new DisplayMetrics(); 
     getWindowManager().getDefaultDisplay().getMetrics(metrics); 
     //get the height and width 
     int h = Math.round(metrics.heightPixels*7/8); 
     int w = metrics.widthPixels; 


     // getting image from resources *************** this is where the image goes in 
     Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.dog_back); 
     // create the bitmap to fit the phone's display 
     bm = Bitmap.createScaledBitmap(bm, w, h, true); 
     // creates a mutable bitmap with the exact height and width 
     bitmap = bm.createBitmap(bm.getWidth(), bm.getHeight(), Bitmap.Config.ARGB_8888); 

     pcanvas = new Canvas(); 
     pcanvas.setBitmap(bitmap); 
     pcanvas.drawBitmap(bm, 0, 0, null); 

    } 

    // method called whenever user's finger touches the image 
    @Override 
    protected void onDraw(Canvas canvas) { 
     // cricle drawn to erase specific region 
     pcanvas.drawCircle(xLoc, yLoc, r, p); 
     canvas.drawBitmap(bitmap, 0, 0, null); 
     super.onDraw(canvas); 
    } 

    // handles on touch events 
    @Override 
    public boolean onTouchEvent(MotionEvent event) { 

     // radius size of circle 
     r =80; 
     // gets the touched location of x and y 
     xLoc = (int) event.getX(); 
     yLoc = (int) event.getY(); 
     //invalidate the canvas 
     invalidate(); 

     return true; 
    } 
} 

} 

接收器意圖的Java類如下：這裏

package com.example.cklim.opencv_test2; 

import android.content.Intent; 
import android.graphics.Bitmap; 
import android.graphics.drawable.BitmapDrawable; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.widget.ImageView; 

public class display extends AppCompatActivity { 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_display); 

    ImageView imageView = (ImageView)findViewById(R.id.imageView); 
    Intent i = getIntent(); 
    Bitmap bitmap = (Bitmap) i.getParcelableExtra("BitmapImage"); 

    //BitmapDrawable ob = new BitmapDrawable(getResources(), bitmap) 


    imageView.setImageBitmap(bitmap); 
} 

} 

任何人有任何想法出了什麼錯我的編碼？實際上，我試圖從圖像中刪除不需要的區域，並嘗試將編輯後的圖像發送到下一個意圖進行進一步處理（疊加到另一個圖像上）。希望我已經解釋清楚了。幫助確實值得歡迎！

Answer 1

通過意圖發送位圖時的大小限制，位圖的大小不應超過4M。您可以將位圖存儲到文件系統，並在第二個活動中從文件系統讀取。