Android编程实现图片拍照剪裁的方法

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 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>