Question

我的Android应用程序中有一个寻呼机活动我需要根据寻呼机中的位置保存图像。我设法做了保存部分但是当我在第一张图片中点击我点击保存它保存第二张图片相同的第二张图片它保存第三张我不知道我的代码有什么问题！ `

enter code here

public boolean onOptionsItemSelected(MenuItem item) 
{
    // Handle item selection
    if (item.getItemId()==R.id.menuFinale) 
    {

        ImageView imageView = (ImageView) findViewById(R.id.image_one);
        imageView.setDrawingCacheEnabled(true);
        Bitmap bitmap = imageView.getDrawingCache();
        File root = Environment.getExternalStorageDirectory();
        MediaStore.Images.Media.insertImage(getContentResolver(), bitmap, "My pic" ,"Saved to gallery");
        File file = new File(root.getAbsolutePath()+"/DCIM/Camera/img.jpg");
        try 
        {
            file.createNewFile();
            FileOutputStream ostream = new FileOutputStream(file);
            bitmap.compress(CompressFormat.JPEG, 100, ostream);
            ostream.close();
        } 
        catch (Exception e) 
        {
            e.printStackTrace();
        }



        return true;
    }
        else  {
                return super.onOptionsItemSelected(item);
            }
    }

Answer 1

尝试以下内容：

 button=(Button)vi.findViewById(R.id.button_save);

        button.setOnClickListener(new OnClickListener() {

  private Bitmap bm;
  private String PREFS_NAME;
public void onClick(View arg0) {
    String root = Environment.getExternalStorageDirectory().toString();
       File myDir = new File(root + "/saved_images");
       if(!myDir.exists()){
           myDir.mkdirs();}
       bm = BitmapFactory.decodeResource( mContext.getResources(), images[itemPos]);
         holder.image.setImageBitmap(bm);
         SharedPreferences savedNumber = mContext.getSharedPreferences(PREFS_NAME, 0); 
        int lastSavedNumber = savedNumber.getInt("lastsavednumber",0); 
        lastSavedNumber++; 
        String fname = "Image-"+lastSavedNumber+".png"; 

        File file = new File (myDir, fname); 
        if (file.exists ()) {file.delete (); } 
        try { 
        FileOutputStream out = new FileOutputStream(file); 
        bm.compress(Bitmap.CompressFormat.PNG, 100, out);//Your Bitmap from the resouce 
        out.flush(); 
        out.close(); }
         catch (Exception e) { 
        e.printStackTrace(); 
        } 

        SharedPreferences saveNumber = mContext.getApplicationContext().getSharedPreferences(PREFS_NAME, 0); 
        SharedPreferences.Editor editorset = saveNumber.edit(); 
        editorset.putInt("lastsavednumber",lastSavedNumber); 
        editorset.commit();
          Toast.makeText(mContext, "saved", Toast.LENGTH_SHORT). show();}});

希望能帮到你。

Answer 2

我终于解决了我的问题而不是imageView我指的是缓存我必须改为引用ViewPager缓存所有包括imageView而不是这里是我的新代码

enter code here

public boolean onOptionsItemSelected(MenuItem item) 
{
    // Handle item selection
    if (item.getItemId()==R.id.menuFinale) 
    {


        pager.setDrawingCacheEnabled(true);

        pager.buildDrawingCache(true);
        pager.setDrawingCacheEnabled(true);

        Bitmap b = pager.getDrawingCache(true);
        File root = Environment.getExternalStorageDirectory();
        MediaStore.Images.Media.insertImage(getContentResolver(), b, "My pic" ,"Saved to gallery");
        File file = new File(root.getAbsolutePath()+"/DCIM/HD.jpg");
        try 
        {
            file.createNewFile();
            FileOutputStream ostream = new FileOutputStream(file);
            b.compress(CompressFormat.JPEG, 100, ostream);
            ostream.close();

        } 
        catch (Exception e) 
        {
            e.printStackTrace();
        }
        return true;
    }
        else  
            {
                return super.onOptionsItemSelected(item);
            }

}

从android寻呼机将图像保存到SD卡

2 个答案: