Android传递Bitmap对象在两个Activity之间

在当前的Activity中通过按钮上的事件响应实现切换View到对应的Activity中去，同时实现Java串行化数据传递。MainActivity的代码如下：

package com.example.sharedemo; 
 
import java.io.ByteArrayOutputStream; 
import java.io.FileOutputStream; 
 
import android.app.Activity; 
import android.content.Context; 
import android.content.Intent; 
import android.graphics.Bitmap; 
import android.graphics.Matrix; 
import android.graphics.drawable.BitmapDrawable; 
import android.os.Bundle; 
import android.os.Handler; 
import android.os.Message; 
import android.util.Log; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.ImageView; 
 
public class MainActivity extends Activity implements OnClickListener{ 
  public final static String SHARE_BITMAP_COMMAND = "share-image"; 
  public final static String SHARE_TEXT_DATA_COMMAND = "share-text-data"; 
  private Handler handler; 
 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    setupOnClickListener(); 
  } 
 
  private void setupOnClickListener() { 
    Button bitmapBtn = (Button)this.findViewById(R.id.bitmapShareBtn); 
    bitmapBtn.setTag(SHARE_BITMAP_COMMAND); 
    bitmapBtn.setOnClickListener(this); 
    Button textDataBtn = (Button)this.findViewById(R.id.mapShareBtn); 
    textDataBtn.setTag(SHARE_TEXT_DATA_COMMAND); 
    textDataBtn.setOnClickListener(this); 
    final ImageView imageView = (ImageView)this.findViewById(R.id.imageView1); 
     
    handler = new Handler() 
    { 
      public void handleMessage(Message msg) { 
        Bitmap bitmap = (Bitmap)msg.obj; 
        if(bitmap != null) 
        { 
          /* 
          // 为防止原始图片过大导致内存溢出，这里先缩小原图显示，然后释放原始Bitmap占用的内存 
          Bitmap smallBitmap = zoomBitmap(bitmap, bitmap.getWidth()/ 5, bitmap.getHeight() / 5); 
          // 释放资源 
          bitmap.recycle(); 
          // 显示图片 
          imageView.setImageBitmap(smallBitmap); 
          imageView.invalidate(); 
          */ 
          imageView.setImageBitmap(bitmap); 
        } 
      } 
    }; 
    ImageLoadTask task = new ImageLoadTask(handler); 
    task.execute("http://www.easck.com/20150607143208238"); 
  } 
   
  public static Bitmap zoomBitmap(Bitmap bitmap, int width, int height) { 
    int w = bitmap.getWidth(); 
    int h = bitmap.getHeight(); 
    Matrix matrix = new Matrix(); 
    float scaleWidth = ((float) width / w); 
    float scaleHeight = ((float) height / h); 
    matrix.postScale(scaleWidth, scaleHeight); // 不改变原来图像大小 
    Bitmap newbmp = Bitmap.createBitmap(bitmap, 0, 0, w, h, matrix, true); 
    return newbmp; 
  } 
 
  @Override 
  public void onClick(View v) { 
    Object tag = v.getTag(); 
    Log.i("command", tag.toString()); 
    if(SHARE_BITMAP_COMMAND.equals(tag)) 
    { 
      Intent intent = new Intent(this.getApplicationContext(), ImageProcessActivity.class); 
      ImageView imageView = (ImageView)this.findViewById(R.id.imageView1); 
      Bitmap bitmap = ((BitmapDrawable)imageView.getDrawable()).getBitmap(); 
      intent.putExtra("selectedImage", bitmap); 
      intent.putExtra("name", "lena"); 
      intent.putExtra("description", "超级大美女"); 
      this.startActivity(intent);      
    } 
    else if(SHARE_TEXT_DATA_COMMAND.equals(tag)) 
    { 
      Intent intent = new Intent(this.getApplicationContext(), ImageProcessActivity.class); 
      ImageView imageView = (ImageView)this.findViewById(R.id.imageView1); 
      Bitmap bitmap = ((BitmapDrawable)imageView.getDrawable()).getBitmap(); 
      // save it first then pass URI 
      ImageInfoBean dto = new ImageInfoBean(); 
      String uri = createImageFromBitmap(bitmap); 
      dto.setDescription("超级大美女"); 
      dto.setName("lena"); 
      dto.setUri(uri); 
       
      intent.putExtra("tiger", dto); 
      this.startActivity(intent);  
    } 
  } 
   
  public String createImageFromBitmap(Bitmap bitmap) { 
    String fileName = "myImage"; 
    try { 
      ByteArrayOutputStream bytes = new ByteArrayOutputStream(); 
      bitmap.compress(Bitmap.CompressFormat.JPEG, 100, bytes); 
      FileOutputStream fo = openFileOutput(fileName, Context.MODE_PRIVATE); 
      fo.write(bytes.toByteArray()); 
      fo.close(); 
    } catch (Exception e) { 
      e.printStackTrace(); 
      fileName = null; 
    } 
    Log.i("fileName", fileName); 
    return fileName; 
  } 
} 
								 
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