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。
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:
<?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。
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