Android调用手机拍照功能

【实例截图】

【核心代码】

package com.example.text_photo;

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.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

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.activity_test);

		imageView = (ImageView) findViewById(R.id.imageView);
		btnPhone = (Button) findViewById(R.id.btnPhone);// 相机
		btnPhone.setOnClickListener(onClickListener);
		btnTakePicture = (Button) findViewById(R.id.btnTakePicture);// 拍照
		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);// 一旦用户选择了一张照片，onActivityResult方法将会被调用
			} else if (v == btnTakePicture) { // 从拍照获取图片

				String state = Environment.getExternalStorageState(); // 判断是否存在sd卡
				if (state.equals(Environment.MEDIA_MOUNTED)) { // 直接调用系统的照相机
					Intent intent = new Intent(
							"android.media.action.IMAGE_CAPTURE");
					startActivityForResult(intent, PHOTO_GRAPH);
				} else {
					Toast.makeText(TestActivity.this, "请检查手机是否有SD卡",
							Toast.LENGTH_LONG).show();
				}

				// 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 这里放在根目录下
			File file = new File(Environment.getExternalStorageDirectory()
					  "/a.jpg");
			Log.i("a", "===file==="   file);

			Bundle bundle = data.getExtras();
			Bitmap bitmap = (Bitmap) bundle.get("data");
			((ImageView) findViewById(R.id.imageView)).setImageBitmap(bitmap);// 将图片显示在ImageView里
			// startPhotoZoom(Uri.fromFile(picture));
		}

		if (data == null)
			return;

		// 读取相册缩放图片
		if (requestCode == PHOTO_ZOOM) {
			Bundle bundle = data.getExtras();
			Bitmap bitmap = (Bitmap) bundle.get("data");
			((ImageView) findViewById(R.id.imageView)).setImageBitmap(bitmap);// 将图片显示在ImageView里
			// 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，具体请看：http://www.cnblogs.com/linjiqin/archive/2011/12/28/2304940.html
				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);
	}

}