Android运用相机照相以及对照片的裁剪_Android

Android使用相机照相以及对照片的裁剪

示例图：

1.Activity源代码：

package com.example.crema;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

public class CramaActivity extends Activity {

   private Button creama=null;

   private ImageView img=null;

   private TextView text=null;

   private File tempFile = new File(Environment.getExternalStorageDirectory(),
           getPhotoFileName());

   private static final int PHOTO_REQUEST_TAKEPHOTO = 1;// 拍照
   private static final int PHOTO_REQUEST_GALLERY = 2;// 从相册中选择
   private static final int PHOTO_REQUEST_CUT = 3;// 结果

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_crama);
        init();
        Log.i("TAG-->", ""+Environment.getExternalStorageDirectory());
    }

    private void init() {
       // TODO Auto-generated method stub

    creama=(Button) findViewById(R.id.btn_creama);

    img=(ImageView) findViewById(R.id.img_creama);

    creama.setOnClickListener(listener);
    text=(TextView) findViewById(R.id.text);



   }
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
       switch (requestCode) {
       case PHOTO_REQUEST_TAKEPHOTO:// 当选择拍照时调用
           startPhotoZoom(Uri.fromFile(tempFile));
           break;
       case PHOTO_REQUEST_GALLERY:// 当选择从本地获取图片时
           // 做非空判断，当我们觉得不满意想重新剪裁的时候便不会报异常，下同
           if (data != null)
               startPhotoZoom(data.getData());
           break;
       case PHOTO_REQUEST_CUT:// 返回的结果
           if (data != null)
               // setPicToView(data);
               sentPicToNext(data);
           break;
       }
       super.onActivityResult(requestCode, resultCode, data);
   }
    private OnClickListener listener=new OnClickListener(){

       @Override
       public void onClick(View arg0) {
           // TODO Auto-generated method stub

           Intent cameraintent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
           // 指定调用相机拍照后照片的储存路径
           cameraintent.putExtra(MediaStore.EXTRA_OUTPUT,
                   Uri.fromFile(tempFile));
           startActivityForResult(cameraintent, PHOTO_REQUEST_TAKEPHOTO);

       }};

   @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_crama, menu);
        return true;
    }



   private void startPhotoZoom(Uri uri) {
       Intent intent = new Intent("com.android.camera.action.CROP");
       intent.setDataAndType(uri, "image/*");
       // crop为true是设置在开启的intent中设置显示的view可以剪裁
       intent.putExtra("crop", "true");

       // aspectX aspectY 是宽高的比例
       intent.putExtra("aspectX", 1);
       intent.putExtra("aspectY", 1);

       // outputX,outputY 是剪裁图片的宽高
       intent.putExtra("outputX", 300);
       intent.putExtra("outputY", 300);
       intent.putExtra("return-data", true);
       intent.putExtra("noFaceDetection", true);
       startActivityForResult(intent, PHOTO_REQUEST_CUT);
   }

   // 将进行剪裁后的图片传递到下一个界面上
   private void sentPicToNext(Intent picdata) {
       Bundle bundle = picdata.getExtras();
       if (bundle != null) {
           Bitmap photo = bundle.getParcelable("data");
           if (photo==null) {
               img.setImageResource(R.drawable.get_user_photo);
           }else {
               img.setImageBitmap(photo);
//               设置文本内容为    图片绝对路径和名字
               text.setText(tempFile.getAbsolutePath());
           }

           ByteArrayOutputStream baos = null;
           try {
               baos = new ByteArrayOutputStream();
               photo.compress(Bitmap.CompressFormat.JPEG, 100, baos);
               byte[] photodata = baos.toByteArray();
               System.out.println(photodata.toString());
               // Intent intent = new Intent();
               // intent.setClass(RegisterActivity.this, ShowActivity.class);
               // intent.putExtra("photo", photodata);
               // startActivity(intent);
               // finish();
           } catch (Exception e) {
               e.getStackTrace();
           } finally {
               if (baos != null) {
                   try {
                       baos.close();
                   } catch (Exception e) {
                       e.printStackTrace();
                   }
               }
           }
       }
   }

   // 使用系统当前日期加以调整作为照片的名称
   private String getPhotoFileName() {
       Date date = new Date(System.currentTimeMillis());
       SimpleDateFormat dateFormat = new SimpleDateFormat(
               "'IMG'_yyyyMMdd_HHmmss");
       return dateFormat.format(date) + ".jpg";
   }
}

2.xml布局文件代码：