android照相及图片裁剪预览（图文）
其中的类：
package com.example.photo1;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
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 MainActivity extends Activity implements OnClickListener{
private Button capture=null,show=null;
private ImageView picture=null,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
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
show = (Button) findViewById(R.id.show);
capture = (Button) findViewById(R.id.capture);
picture = (ImageView) findViewById(R.id.picture);
img = (ImageView) findViewById(R.id.img);
text = (TextView) findViewById(R.id.text);
capture.setOnClickListener(this);
show.setOnClickListener(this);
Log.i("TAG-->", ""+Environment.getExternalStorageDirectory());
}
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);
}
@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", 200);
intent.putExtra("outputY", 200);
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) {
picture.setImageResource(R.drawable.ic_launcher);
}else {
picture.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";
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(v==capture){
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);
}
if(v==show){
show();
}
}
private void show() {
// TODO Auto-generated method stub
if(tempFile.getAbsolutePath()==null){
img.setImageResource(R.drawable.ic_launcher);
}else{
Bitmap bmp=BitmapFactory.decodeFile(tempFile.getAbsolutePath());
img.setImageBitmap(bmp);
}
}
}
其中的xml文件：
<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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
>
<ImageView
android:id="@+id/picture"
android:layout_width="200dp"
android:layout_height="200dp"
android:background="#0f0"
android:layout_gravity="center_horizontal"
/>
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center"
>
<Button
android:id="@+id/capture"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="capture"
android:layout_marginTop="10dp"
/>
<Button
android:id="@+id/show"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="show"
android:layout_marginLeft="20dp"
android:layout_marginTop="10dp"
/>
</LinearLayout>
<TextView
android:id="@+id/text"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:textSize="16sp"
android:background="#22000000"
/>
<ImageView
android:id="@+id/img"
android:layout_width="100dp"
android:layout_height="100dp"
android:background="#00f"
android:layout_marginTop="10dp"
android:layout_gravity="center_horizontal"
/>
</LinearLayout>
</RelativeLayout>
效果图：
截图是采用android4.2的模拟器中的摄像头所截的图片，已经真机测试过了，真机测试也没有问题；
上面的图片是裁剪后的预览效果，下面图是问裁剪的图片。
文章是我根据http://blog.csdn.net/qq435757399/article/details/8124269文章更改的；