Android编程实现图片拍照剪裁的方法
内容摘要
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
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
文章正文
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。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 | 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); } } |
XML文件:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | <?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> |
希望本文所述对大家Android程序设计有所帮助。
代码注释