通過EXTRA_OUTPUT, 指定並顯示使用 ACTION_IMAGE_CAPTURE 拍攝的圖像

在本博客的舊文章"通過EXTRA_OUTPUT, 指定儲存圖像的路徑"中, 描述了如何指定儲存圖像的路徑, 但沒有描述如何顯示拍攝的圖像. 本文將描述如何在onActivityResult()通過 BitmapFactory 顯示拍攝的圖像.

package com.AndroidImageCapture;

import java.io.File;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

public class AndroidImageCaptureActivity extends Activity {
 
 ImageView imageiewImageCaptured;
 String strImage;
 
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button buttonImageCapture = (Button)findViewById(R.id.captureimage);
        imageiewImageCaptured = (ImageView)findViewById(R.id.imagecaptured);
        
        buttonImageCapture.setOnClickListener(buttonImageCaptureOnClickListener);
    }
    
    Button.OnClickListener buttonImageCaptureOnClickListener
    = new Button.OnClickListener(){

  public void onClick(View v) {
   // TODO Auto-generated method stub
   //Specify the path of the captured image
    strImage = Environment.getExternalStorageDirectory().getAbsolutePath()+"/mypicture.jpg";
    File myImage = new File(strImage);
    Uri uriMyImage = Uri.fromFile(myImage);
     
    Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
    intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, uriMyImage);
    startActivityForResult(intent, 0);
  }
   };

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  // TODO Auto-generated method stub
  super.onActivityResult(requestCode, resultCode, data);
  if (resultCode == RESULT_OK)
  {
   Bitmap bmp = BitmapFactory.decodeFile(strImage);
   imageiewImageCaptured.setImageBitmap(bmp);
  }
 }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView  
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content" 
    android:text="@string/hello"
    />
<Button
   android:id="@+id/captureimage"
   android:layout_width="fill_parent"
   android:layout_height="wrap_content"
   android:text="Call for ACTION_IMAGE_CAPTURE"
   />
<ImageView
   android:id="@+id/imagecaptured"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   />
</LinearLayout>