android 实现图片的裁剪

package com.cut.test;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 CutTestActivity 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;@Overridepublic 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() {@Overridepublic 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() {@Overridepublic 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);}});}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {if (resultCode == NONE)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));}if (data == null)return;// 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>

最后不要忘记添加权限：

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

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