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package com.demo;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Calendar;
import java.util.Locale;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.text.format.DateFormat;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
 
public class MyCameraActivity extends Activity {
        /** Called when the activity is first created. */
        private Button button;

        @Override
        public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
                setContentView(R.layout.main);
                button = (Button) findViewById(R.id.button);
                button.setOnClickListener(new OnClickListener() {
                        @Override
                        public void onClick(View v) {
                                // TODO Auto-generated method stub
                                Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                                startActivityForResult(intent, 1);
                        }
                });
        }

        @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
                // TODO Auto-generated method stub
                super.onActivityResult(requestCode, resultCode, data);
                if (resultCode == Activity.RESULT_OK) {
                        String sdStatus = Environment.getExternalStorageState();
                        if (!sdStatus.equals(Environment.MEDIA_MOUNTED)) { // 检测sd是否可用
                                Log.i("TestFile",
                                                "SD card is not avaiable/writeable right now.");
                                return;
                        }
                        String name = new DateFormat().format("yyyyMMdd_hhmmss",Calendar.getInstance(Locale.CHINA)) + ".jpg";       
                        Toast.makeText(this, name, Toast.LENGTH_LONG).show();
                        Bundle bundle = data.getExtras();
                        Bitmap bitmap = (Bitmap) bundle.get("data");// 获取相机返回的数据，并转换为Bitmap图片格式              

                        FileOutputStream b = null;                 
                        File file = new File("/sdcard/myImage/");
                        file.mkdirs();// 创建文件夹
                        String fileName = "/sdcard/myImage/"+name;
                         try {
                                b = new FileOutputStream(fileName);
                                bitmap.compress(Bitmap.CompressFormat.JPEG, 100, b);// 把数据写入文件
                        } catch (FileNotFoundException e) {
                                e.printStackTrace();
                        } finally {
                                try {
                                        b.flush();
                                        b.close();
                                } catch (IOException e) {
                                        e.printStackTrace();
                                }
                        }
                        ((ImageView) findViewById(R.id.imageView)).setImageBitmap(bitmap);// 将图片显示在ImageView里
                }
        }
}