使用意圖"MediaStore.ACTION_IMAGE_CAPTURE"要求其他服務提供程序幫我們拍照

在之前另一篇文章描述了如何"實現Android照相機的拍照功能(Camera.takePicture)", 當然，這是一個很簡單的例子. 其實，有時我們不需要我們自己編寫所有的程序碼; Android提供了一種機制: 意圖(Intent).

通過使用意圖"android.provider.MediaStore.ACTION_IMAGE_CAPTURE", 我們可以要求其他服務提供程序幫助, Android操作系統會自動選擇合適的程序幫我們拍照, 然後再把圖片送回給我們.



main.xml

<?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>

AndroidImageCapture.java

package com.AndroidImageCapture;

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

public class AndroidImageCapture extends Activity {
 
 ImageView imageiewImageCaptured;
 
   /** 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(){

  @Override
  public void onClick(View arg0) {
   // TODO Auto-generated method stub
   Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
   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)
  {
   Bundle extras = data.getExtras();
   Bitmap bmp = (Bitmap) extras.get("data");
   imageiewImageCaptured.setImageBitmap(bmp); 
  }
  
 }
}

相關文章:
- 通過EXTRA_OUTPUT, 指定儲存圖像的路徑