Android编程实现图片拍照剪裁的方法
本文实例讲述了Android实现图片拍照剪裁的方法。分享给大家供大家参考，具体如下：
调用系统的裁剪工具对相册或者拍照的图片进行裁剪。
startActivityforResult用的很恰当，一些系统action需要注意。
packagecom.photosizing;
importjava.io.ByteArrayOutputStream;
importjava.io.File;
importandroid.app.Activity;
importandroid.content.Intent;
importandroid.graphics.Bitmap;
importandroid.net.Uri;
importandroid.os.Bundle;
importandroid.os.Environment;
importandroid.provider.MediaStore;
importandroid.view.View;
importandroid.view.View.OnClickListener;
importandroid.widget.Button;
importandroid.widget.ImageView;
publicclasstestActivityextendsActivity{
publicstaticfinalintNONE=0;
publicstaticfinalintPHOTOHRAPH=1;//拍照
publicstaticfinalintPHOTOZOOM=2;//缩放
publicstaticfinalintPHOTORESOULT=3;//结果
publicstaticfinalStringIMAGE_UNSPECIFIED="image/*";
ImageViewimageView=null;
Buttonbutton0=null;
Buttonbutton1=null;
@Override
publicvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
imageView=(ImageView)findViewById(R.id.imageID);
button0=(Button)findViewById(R.id.btn_01);
button1=(Button)findViewById(R.id.btn_02);
button0.setOnClickListener(newOnClickListener(){
@Override
publicvoidonClick(Viewv){
Intentintent=newIntent(Intent.ACTION_PICK,null);
intent.setDataAndType(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
IMAGE_UNSPECIFIED);
startActivityForResult(intent,PHOTOZOOM);
}
});
button1.setOnClickListener(newOnClickListener(){
@Override
publicvoidonClick(Viewv){
Intentintent=newIntent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(newFile(
Environment.getExternalStorageDirectory(),"temp.jpg")));
startActivityForResult(intent,PHOTOHRAPH);
}
});
}
@Override
protectedvoidonActivityResult(intrequestCode,intresultCode,Intentdata){
if(resultCode==NONE)
return;
if(data==null)
return;
//拍照
if(requestCode==PHOTOHRAPH){
//设置文件保存路径这里放在跟目录下
Filepicture=newFile(Environment.getExternalStorageDirectory()
+"/temp.jpg");
startPhotoZoom(Uri.fromFile(picture));
}
//读取相册缩放图片
if(requestCode==PHOTOZOOM){
startPhotoZoom(data.getData());
}
//处理结果
if(requestCode==PHOTORESOULT){
Bundleextras=data.getExtras();
if(extras!=null){
Bitmapphoto=extras.getParcelable("data");
ByteArrayOutputStreamstream=newByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.JPEG,75,stream);
//(0-100)压缩文件
imageView.setImageBitmap(photo);
}
}
super.onActivityResult(requestCode,resultCode,data);
}
publicvoidstartPhotoZoom(Uriuri){
Intentintent=newIntent("com.android.camera.action.CROP");
intent.setDataAndType(uri,IMAGE_UNSPECIFIED);
intent.putExtra("crop","true");
//aspectXaspectY是宽高的比例
intent.putExtra("aspectX",1);
intent.putExtra("aspectY",1);
//outputXoutputY是裁剪图片宽高
intent.putExtra("outputX",64);
intent.putExtra("outputY",64);
intent.putExtra("return-data",true);
startActivityForResult(intent,PHOTORESOULT);
}
}
XML文件：
<?xmlversion="1.0"encoding="utf-8"?> <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical"android:layout_width="fill_parent" android:layout_height="fill_parent"> <TextViewandroid:layout_width="fill_parent" android:layout_height="wrap_content"android:text="@string/hello"/> <ImageViewandroid:id="@+id/imageID" android:adjustViewBounds="true"android:maxWidth="50dip" android:maxHeight="50dip"android:layout_width="wrap_content" android:layout_height="wrap_content"/> <Buttonandroid:id="@+id/btn_01"android:layout_height="50dip" android:text="相册"android:layout_width="150dip"/> <Buttonandroid:id="@+id/btn_02"android:layout_height="50dip" android:text="拍照"android:layout_width="150dip"/> </LinearLayout>
希望本文所述对大家Android程序设计有所帮助。