Android开发之裁剪照片

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1.   从相册选择照片进行裁剪

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从相册选择照片并裁剪：

/** * 从相册选择照片进行裁剪 */private void cropFromGallery() {    // TODO Auto-generated method stub        Intent intent=new Intent();    intent.setAction(Intent.ACTION_PICK);//Pick an item from the data    intent.setType("image/*");//从所有图片中进行选择    intent.putExtra("crop", "true");//设置为裁切    intent.putExtra("aspectX", 1);//裁切的宽比例    intent.putExtra("aspectY", 1);//裁切的高比例    intent.putExtra("outputX", 600);//裁切的宽度    intent.putExtra("outputY", 600);//裁切的高度    intent.putExtra("scale", true);//支持缩放    intent.putExtra("return-data", false);    intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);//将裁切的结果输出到指定的Uri    intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());//裁切成的图片的格式    intent.putExtra("noFaceDetection", true); // no face detection    startActivityForResult(intent, SELECT_PIC);   }

将裁减好的照片显示在显示在ImagaView上：

case SELECT_PIC:    if (resultCode==RESULT_OK) {        try {            Bitmap bitmap=BitmapFactory.decodeStream(getContentResolver().                    openInputStream(imageUri));//将imageUri对象的图片加载到内存            imgShow.setImageBitmap(bitmap);        } catch (FileNotFoundException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }    break;

程序运行效果图：

2.   从相机拍取照片进行裁剪

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控制相机拍照并将照片保存到指定位置：

/** * 从相机拍取照片进行裁剪 */private void cropFromTake() {    // TODO Auto-generated method stub    Intent intent=new Intent();    intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);//设置Action为拍照    intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);//将拍取的照片保存到指定URI    startActivityForResult(intent, TAKE_PIC);}

裁剪已经排好的照片并显示在ImageView上：

case TAKE_PIC:    if (resultCode==RESULT_OK) {        cropImageUri(imageUri, 600, 600, CROP_PIC);    }    break;

/** * 裁剪指定uri对应的照片 * @param imageUri：uri对应的照片 * @param outputX：裁剪宽 * @param outputY：裁剪高 * @param requestCode：请求码 */private void cropImageUri(Uri imageUri, int outputX, int outputY, int requestCode){    Intent intent = new Intent("com.android.camera.action.CROP");    intent.setDataAndType(imageUri, "image/*");    intent.putExtra("crop", "true");    intent.putExtra("aspectX", 1);    intent.putExtra("aspectY", 1);    intent.putExtra("outputX", outputX);    intent.putExtra("outputY", outputY);    intent.putExtra("scale", true);    intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);    intent.putExtra("return-data", false);    intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());    intent.putExtra("noFaceDetection", true); // no face detection    startActivityForResult(intent, requestCode);}

程序运行效果图：

3.完整项目代码：

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package com.jph.cp;import java.io.File;import java.io.FileNotFoundException;import android.support.v7.app.ActionBarActivity;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.provider.MediaStore;import android.view.View;import android.widget.ImageView;/** * 从相册选择照片进行裁剪，从相机拍取照片进行裁剪 * @author JPH * Date:2014.10.09 */public class MainActivity extends ActionBarActivity {private final static int SELECT_PIC=0x123; private final static int TAKE_PIC=0x124; private final static int CROP_PIC=0x125; private Uri imageUri;private ImageView imgShow;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);//初始化imageUriimageUri=Uri.fromFile(new File(Environment.getExternalStorageDirectory(), "test.jpg"));imgShow=(ImageView)findViewById(R.id.imgShow);}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {// TODO Auto-generated method stubswitch (requestCode) {case SELECT_PIC:if (resultCode==RESULT_OK) {try {Bitmap bitmap=BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));//将imageUri对象的图片加载到内存imgShow.setImageBitmap(bitmap);} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}}break;case TAKE_PIC:if (resultCode==RESULT_OK) {cropImageUri(imageUri, 600, 600, CROP_PIC);}break;case CROP_PIC:if (resultCode==RESULT_OK) {try {Bitmap bitmap=BitmapFactory.decodeStream(getContentResolver().openInputStream(imageUri));//将imageUri对象的图片加载到内存imgShow.setImageBitmap(bitmap);} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}}break;default:break;}super.onActivityResult(requestCode, resultCode, data);}/** * 裁剪指定uri对应的照片 * @param imageUri：uri对应的照片 * @param outputX：裁剪宽 * @param outputY：裁剪高 * @param requestCode：请求码 */private void cropImageUri(Uri imageUri, int outputX, int outputY, int requestCode){    Intent intent = new Intent("com.android.camera.action.CROP");    intent.setDataAndType(imageUri, "image/*");    intent.putExtra("crop", "true");    intent.putExtra("aspectX", 1);    intent.putExtra("aspectY", 1);    intent.putExtra("outputX", outputX);    intent.putExtra("outputY", outputY);    intent.putExtra("scale", true);    intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);    intent.putExtra("return-data", false);    intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());    intent.putExtra("noFaceDetection", true); // no face detection    startActivityForResult(intent, requestCode);}public void cropPic(View view) {switch (view.getId()) {case R.id.btnCropFromGallery://从相册选择照片进行裁剪cropFromGallery();break;case R.id.btnCropFromTake://从相机拍取照片进行裁剪cropFromTake();break;default:break;}}/** * 从相机拍取照片进行裁剪 */private void cropFromTake() {// TODO Auto-generated method stubIntent intent=new Intent();intent.setAction(MediaStore.ACTION_IMAGE_CAPTURE);//设置Action为拍照intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);//将拍取的照片保存到指定URIstartActivityForResult(intent, TAKE_PIC);}/** * 从相册选择照片进行裁剪 */private void cropFromGallery() {// TODO Auto-generated method stubIntent intent=new Intent();intent.setAction(Intent.ACTION_PICK);//Pick an item from the dataintent.setType("image/*");//从所有图片中进行选择intent.putExtra("crop", "true");//设置为裁切intent.putExtra("aspectX", 1);//裁切的宽比例intent.putExtra("aspectY", 1);//裁切的高比例intent.putExtra("outputX", 600);//裁切的宽度intent.putExtra("outputY", 600);//裁切的高度intent.putExtra("scale", true);//支持缩放intent.putExtra("return-data", false);intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);//将裁切的结果输出到指定的Uriintent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());//裁切成的图片的格式intent.putExtra("noFaceDetection", true); // no face detectionstartActivityForResult(intent, SELECT_PIC);    }}