Android控制摄像头拍照并对照片进行裁剪，,mainActivity

Android控制摄像头拍照并对照片进行裁剪，,mainActivity

mainActivity如下:

package cn.testcamera;import java.io.File;import java.text.SimpleDateFormat;import java.util.Date;import android.app.Activity;import android.content.ContentResolver;import android.content.ContentUris;import android.content.Intent;import android.database.Cursor;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.net.Uri;import android.os.Bundle;import android.provider.MediaStore;import android.view.View;import android.widget.Button;import android.widget.ImageView;public class MainActivity extends Activity {    private Button mButton;    private ImageView mImageView;    private File mPhotoFile;    private String mPhotoPath;    private Uri mPhotoOnSDCardUri;    public final static int CAMERA_RESULT=777;    public final static int CAMERA_RESULT_CUT=888;    public final static int CAMERA_RESULT_CUT_OVER=999;    public final static String TAG="xx";    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        mButton = (Button) findViewById(R.id.button);        mButton.setOnClickListener(new ButtonOnClickListener());        mImageView = (ImageView) findViewById(R.id.imageView);    }    private class ButtonOnClickListener implements View.OnClickListener {        public void onClick(View v) {            try {                Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");                mPhotoPath="mnt/sdcard/DCIM/Camera/"+getPhotoFileName();                mPhotoFile = new File(mPhotoPath);                if (!mPhotoFile.exists()) {                    mPhotoFile.createNewFile();                }                mPhotoOnSDCardUri=Uri.fromFile(mPhotoFile);                intent.putExtra(MediaStore.EXTRA_OUTPUT, mPhotoOnSDCardUri);                //拍照后显示此图片                //startActivityForResult(intent,CAMERA_RESULT);                //拍照后先修改再显示此图片                startActivityForResult(intent,CAMERA_RESULT_CUT);            } catch (Exception e) {            }        }    }    @Override    protected void onActivityResult(int requestCode, int resultCode, Intent data) {        super.onActivityResult(requestCode, resultCode, data);        //1   拍照后显示照片        if (requestCode==CAMERA_RESULT) {             Bitmap bitmap = BitmapFactory.decodeFile(mPhotoPath, null);               mImageView.setImageBitmap(bitmap);        }        //2   拍照后剪切照片,然后显示        //2.1拍照且剪裁        if (requestCode == CAMERA_RESULT_CUT) {            Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,mPhotoOnSDCardUri);            sendBroadcast(intent);            try {                Thread.sleep(2000);            } catch (InterruptedException e) {                e.printStackTrace();            }            Uri systemImageUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;            ContentResolver contentResolver = getContentResolver();            Cursor cursor = contentResolver.query(systemImageUri, null,                    MediaStore.Images.Media.DISPLAY_NAME + "='"                            + mPhotoFile.getName() + "'", null, null);            Uri photoUriInMedia = null;            if (cursor != null && cursor.getCount() > 0) {                cursor.moveToLast();                long id = cursor.getLong(0);                photoUriInMedia = ContentUris.withAppendedId(systemImageUri, id);            }            cursor.close();            Intent in = new Intent("com.android.camera.action.CROP");            //需要裁减的图片格式            in.setDataAndType(photoUriInMedia, "image/*");            //允许裁减            in.putExtra("crop", "true");            //剪裁后ImageView显时图片的宽            in.putExtra("outputX", 250);            //剪裁后ImageView显时图片的高            in.putExtra("outputY", 250);            //设置剪裁框的宽高比例            in.putExtra("aspectX", 1);            in.putExtra("aspectY", 1);            in.putExtra("return-data", true);            startActivityForResult(in, CAMERA_RESULT_CUT_OVER);        }        //2.2显示        if (requestCode==CAMERA_RESULT_CUT_OVER) {            //剪切图片的时候,若"放弃"则回答的data为null            if (data!=null) {                Bitmap bitmap = (Bitmap) data.getExtras().get("data");                mImageView.setImageBitmap(bitmap);            }        }    }    private String getPhotoFileName() {        Date date = new Date(System.currentTimeMillis());        SimpleDateFormat dateFormat = new SimpleDateFormat("'IMG'_yyyyMMdd_HHmmss");        return dateFormat.format(date) + ".jpg";    }}

main.xml```xml<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/button"    android:layout_width="fill_parent"    android:layout_height="wrap_content"    android:text="点击按钮拍照" /><ImageView     android:id="@+id/imageView"    android:layout_below="@id/button"    android:layout_width="fill_parent"    android:layout_height="wrap_content" />

</RelativeLayout>

```xml<manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="cn.testcamera"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="10" />    <uses-permission android:name="android.permission.CAMERA"/>    <uses-permission android:name="android.permission.INTERNET" />    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />    <application        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name=".MainActivity"            android:launchMode="singleTask"            android:label="@string/title_activity_main" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>