Android拍照后先剪裁再显示图片

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如下:

<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>

manifest.xml如下:

<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>