Android调用手机拍照功能的方法

<?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">
 <ImageView android:id="@+id/imageView"
  android:adjustViewBounds="true"
  android:layout_gravity="center"
  android:minWidth="150dip"
  android:minHeight="150dip"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"/>
 <Button android:id="@+id/btnPhone"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="相册" />
 <Button android:id="@+id/btnTakePicture"
  android:layout_height="wrap_content"
  android:layout_width="fill_parent"
  android:text="拍照" />
</LinearLayout>

package com.ljq.test;
import java.io.ByteArrayOutputStream;
import java.io.File;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class TestActivity extends Activity {
 private static final int NONE = 0;
 private static final int PHOTO_GRAPH = 1;// 拍照
 private static final int PHOTO_ZOOM = 2; // 缩放
 private static final int PHOTO_RESOULT = 3;// 结果
 private static final String IMAGE_UNSPECIFIED = "image/*";
 private ImageView imageView = null;
 private Button btnPhone = null;
 private Button btnTakePicture = null;
 @Override
 public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);
  imageView = (ImageView) findViewById(R.id.imageView);
  btnPhone = (Button) findViewById(R.id.btnPhone);
  btnPhone.setOnClickListener(onClickListener);
  btnTakePicture = (Button) findViewById(R.id.btnTakePicture);
  btnTakePicture.setOnClickListener(onClickListener);
 }
 private final View.OnClickListener onClickListener = new View.OnClickListener() {
  @Override
  public void onClick(View v) {
   if(v==btnPhone){ //从相册获取图片
    Intent intent = new Intent(Intent.ACTION_PICK, null);
    intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, IMAGE_UNSPECIFIED);
    startActivityForResult(intent, PHOTO_ZOOM);
   }else if(v==btnTakePicture){ //从拍照获取图片
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(Environment
     .getExternalStorageDirectory(),"temp.jpg")));
    startActivityForResult(intent, PHOTO_GRAPH);
   }
  }
 };
 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  if (resultCode == NONE)
   return;
  // 拍照
  if (requestCode == PHOTO_GRAPH) {
   // 设置文件保存路径
   File picture = new File(Environment.getExternalStorageDirectory()
     + "/temp.jpg");
   startPhotoZoom(Uri.fromFile(picture));
  }
  if (data == null)
   return;
  // 读取相册缩放图片
  if (requestCode == PHOTO_ZOOM) {
   startPhotoZoom(data.getData());
  }
  // 处理结果
  if (requestCode == PHOTO_RESOULT) {
   Bundle extras = data.getExtras();
   if (extras != null) {
    Bitmap photo = extras.getParcelable("data");
    ByteArrayOutputStream stream = new ByteArrayOutputStream();
    photo.compress(Bitmap.CompressFormat.JPEG, 75, stream);// (0-100)压缩文件
    //此处可以把Bitmap保存到sd卡中
    imageView.setImageBitmap(photo); //把图片显示在ImageView控件上
   }
  }
  super.onActivityResult(requestCode, resultCode, data);
 }
 /**
  * 收缩图片
  * 
  * @param uri
  */
 public void startPhotoZoom(Uri uri) {
  Intent intent = new Intent("com.android.camera.action.CROP");
  intent.setDataAndType(uri, IMAGE_UNSPECIFIED);
  intent.putExtra("crop", "true");
  // aspectX aspectY 是宽高的比例
  intent.putExtra("aspectX", 1);
  intent.putExtra("aspectY", 1);
  // outputX outputY 是裁剪图片宽高
  intent.putExtra("outputX", 300);
  intent.putExtra("outputY", 500);
  intent.putExtra("return-data", true);
  startActivityForResult(intent, PHOTO_RESOULT);
 }
}