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。
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package com.photosizing;
import java.io.ByteArrayOutputStream;
import java.io.File;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
public class testActivity extends Activity {
public static final int NONE = 0 ;
public static final int PHOTOHRAPH = 1 ; // 拍照
public static final int PHOTOZOOM = 2 ; // 缩放
public static final int PHOTORESOULT = 3 ; // 结果
public static final String IMAGE_UNSPECIFIED = "image/*" ;
ImageView imageView = null ;
Button button0 = null ;
Button button1 = null ;
@Override
public void onCreate(Bundle savedInstanceState) {
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( new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_PICK, null );
intent.setDataAndType(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
IMAGE_UNSPECIFIED);
startActivityForResult(intent, PHOTOZOOM);
}
});
button1.setOnClickListener( new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile( new File(
Environment.getExternalStorageDirectory(), "temp.jpg" )));
startActivityForResult(intent, PHOTOHRAPH);
}
});
}
@Override
protected void onActivityResult( int requestCode, int resultCode, Intent data) {
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
File picture = new File(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) {
Bundle extras = data.getExtras();
if (extras != null ) {
Bitmap photo = extras.getParcelable( "data" );
ByteArrayOutputStream stream = new ByteArrayOutputStream();
photo.compress(Bitmap.CompressFormat.JPEG, 75 , stream);
// (0 - 100)压缩文件
imageView.setImageBitmap(photo);
}
}
super .onActivityResult(requestCode, resultCode, data);
}
public void startPhotoZoom(Uri uri) {
Intent intent = new Intent( "com.android.camera.action.CROP" );
intent.setDataAndType(uri, IMAGE_UNSPECIFIED);
intent.putExtra( "crop" , "true" );
// aspectX aspectY 是宽高的比例
intent.putExtra( "aspectX" , 1 );
intent.putExtra( "aspectY" , 1 );
// outputX outputY 是裁剪图片宽高
intent.putExtra( "outputX" , 64 );
intent.putExtra( "outputY" , 64 );
intent.putExtra( "return-data" , true );
startActivityForResult(intent, PHOTORESOULT);
}
}
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XML文件:
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<? xml version = "1.0" encoding = "utf-8" ?>
< LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"
android:orientation = "vertical" android:layout_width = "fill_parent"
android:layout_height = "fill_parent" >
< TextView android:layout_width = "fill_parent"
android:layout_height = "wrap_content" android:text = "@string/hello" />
< ImageView android:id = "@+id/imageID"
android:adjustViewBounds = "true" android:maxWidth = "50dip"
android:maxHeight = "50dip" android:layout_width = "wrap_content"
android:layout_height = "wrap_content" />
< Button android:id = "@+id/btn_01" android:layout_height = "50dip"
android:text = "相册" android:layout_width = "150dip" />
< Button android:id = "@+id/btn_02" android:layout_height = "50dip"
android:text = "拍照" android:layout_width = "150dip" />
</ LinearLayout >
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希望本文所述对大家Android程序设计有所帮助。