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); }}