Android使用相机照相以及对照片的裁剪
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：
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <Button android:id="@+id/btn_creama" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:text="@string/hello_world" tools:context=".CramaActivity" /> <ImageView android:id="@+id/img_creama" android:layout_width="150dip" android:layout_height="150dip" android:layout_margin="15dip" android:layout_centerHorizontal="true" android:layout_below="@+id/btn_creama" android:scaleType="fitXY" android:background="@drawable/bg_img_coner" /> <TextView android:id="@+id/text" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_below="@+id/img_creama" android:textSize="16sp" android:background="#22000000" /> </RelativeLayout>
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