图片照相剪裁

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>