在android的开发过程中,经常遇到设置用户头像以及裁剪图像大小的功能。昨天我遇到了设置用户头像的功能,开始不知道怎么搞,在技术群里问也没人回答,就研究了微信、以及4399游戏中心用户设置头像的功能,了解到用户设置图像的过程,就是两步点击设置头像,选择头像资源的来源,相册和相机两个来得到。
闲话说的有点多了,来说说技术点吧。其实也比较简单,就是通过Intent来启动相册或者相机就可以了。
看下效果图:
启动相册以及相机关键代码:
- switch (which) {
- case 0:
- // 打开相册
- Intent intentFromGallery = new Intent();
- intentFromGallery.setType("image/*"); // 设置文件类型
- intentFromGallery
- .setAction(Intent.ACTION_GET_CONTENT);
- startActivityForResult(intentFromGallery,
- IMAGE_REQUEST_CODE);
- break;
- case 1:
- // 打开相机
- Intent intentFromCapture = new Intent(
- MediaStore.ACTION_IMAGE_CAPTURE);
- // 判断存储卡是否可以用,可用进行存储
- if (Tools.hasSdcard()) {
- intentFromCapture.putExtra(
- MediaStore.EXTRA_OUTPUT,
- Uri.fromFile(new File(Environment
- .getExternalStorageDirectory(),
- IMAGE_FILE_NAME)));
- }
- startActivityForResult(intentFromCapture,
- CAMERA_REQUEST_CODE);
- break;
- }
打开系统自带的裁剪功能代码:
- /**
- * 裁剪图片方法实现
- *
- * @param uri
- */
- public void startPhotoZoom(Uri uri) {
- Intent intent = new Intent("com.android.camera.action.CROP");
- intent.setDataAndType(uri, "image/*");
- // 设置裁剪
- 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", 320);
- intent.putExtra("outputY", 320);
- intent.putExtra("return-data", true);
- startActivityForResult(intent, 2);
- }
完整实现代码如下:
- package com.xzw.picture;
- import java.io.File;
- import com.xzw.utils.Tools;
- import android.app.Activity;
- import android.app.AlertDialog;
- import android.content.DialogInterface;
- import android.content.Intent;
- import android.graphics.Bitmap;
- import android.graphics.drawable.BitmapDrawable;
- import android.graphics.drawable.Drawable;
- import android.net.Uri;
- import android.os.Bundle;
- import android.os.Environment;
- import android.provider.MediaStore;
- import android.view.View;
- import android.view.Window;
- import android.widget.ImageView;
- import android.widget.RelativeLayout;
- import android.widget.Toast;
- /**
- *
- * @author XuZhiwei (xuzw13@gmail.com)
- * Create at 2012-8-17 上午10:14:40
- */
- public class MainActivity extends Activity {
- /*组件*/
- private RelativeLayout switchAvatar;
- private ImageView faceImage;
- private String[] items = new String[] { "选择本地图片", "拍照" };
- /*头像名称*/
- private static final String IMAGE_FILE_NAME = "faceImage.jpg";
- /* 请求码*/
- private static final int IMAGE_REQUEST_CODE = 0;
- private static final int CAMERA_REQUEST_CODE = 1;
- private static final int RESULT_REQUEST_CODE = 2;
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- requestWindowFeature(Window.FEATURE_NO_TITLE); // 去掉标题
- setContentView(R.layout.main);
- switchAvatar = (RelativeLayout) findViewById(R.id.switch_face_rl);
- faceImage = (ImageView) findViewById(R.id.face);
- //设置事件监听
- switchAvatar.setOnClickListener(listener);
- }
- private View.OnClickListener listener = new View.OnClickListener() {
- @Override
- public void onClick(View v) {
- showDialog();
- }
- };
- /**
- * 显示选择对话框
- */
- private void showDialog() {
- new AlertDialog.Builder(this)
- .setTitle("设置头像")
- .setItems(items, new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog, int which) {
- switch (which) {
- case 0:
- Intent intentFromGallery = new Intent();
- intentFromGallery.setType("image/*"); // 设置文件类型
- intentFromGallery
- .setAction(Intent.ACTION_GET_CONTENT);
- startActivityForResult(intentFromGallery,
- IMAGE_REQUEST_CODE);
- break;
- case 1:
- Intent intentFromCapture = new Intent(
- MediaStore.ACTION_IMAGE_CAPTURE);
- // 判断存储卡是否可以用,可用进行存储
- if (Tools.hasSdcard()) {
- intentFromCapture.putExtra(
- MediaStore.EXTRA_OUTPUT,
- Uri.fromFile(new File(Environment
- .getExternalStorageDirectory(),
- IMAGE_FILE_NAME)));
- }
- startActivityForResult(intentFromCapture,
- CAMERA_REQUEST_CODE);
- break;
- }
- }
- })
- .setNegativeButton("取消", new DialogInterface.OnClickListener() {
- @Override
- public void onClick(DialogInterface dialog, int which) {
- dialog.dismiss();
- }
- }).show();
- }
- @Override
- protected void onActivityResult(int requestCode, int resultCode, Intent data) {
- //结果码不等于取消时候 if (resultCode != RESULT_CANCELED) {
- switch (requestCode) {
- case IMAGE_REQUEST_CODE:
- startPhotoZoom(data.getData());
- break;
- case CAMERA_REQUEST_CODE:
- if (Tools.hasSdcard()) {
- File tempFile = new File(
- Environment.getExternalStorageDirectory()
- + IMAGE_FILE_NAME);
- startPhotoZoom(Uri.fromFile(tempFile));
- } else {
- Toast.makeText(MainActivity.this, "未找到存储卡,无法存储照片!",
- Toast.LENGTH_LONG).show();
- }
- break;
- case RESULT_REQUEST_CODE:
- if (data != null) {
- getImageToView(data);
- }
- break;
- }
- }
- super.onActivityResult(requestCode, resultCode, data);
- }
- /**
- * 裁剪图片方法实现
- *
- * @param uri
- */
- public void startPhotoZoom(Uri uri) {
- Intent intent = new Intent("com.android.camera.action.CROP");
- intent.setDataAndType(uri, "image/*");
- // 设置裁剪
- 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", 320);
- intent.putExtra("outputY", 320);
- intent.putExtra("return-data", true);
- startActivityForResult(intent, 2);
- }
- /**
- * 保存裁剪之后的图片数据
- *
- * @param picdata
- */
- private void getImageToView(Intent data) {
- Bundle extras = data.getExtras();
- if (extras != null) {
- Bitmap photo = extras.getParcelable("data");
- Drawable drawable = new BitmapDrawable(photo);
- faceImage.setImageDrawable(drawable);
- }
- }
- }
还有一个工具类:
以上就是实现的代码!完整的资源包。
- package com.xzw.utils;
- import android.os.Environment;
- /**
- *
- * @author XuZhiwei (xuzw13@gmail.com)
- * Create at 2012-8-17 上午10:14:40
- */
- public class Tools {
- /**
- * 检查是否存在SDCard
- * @return
- */
- public static boolean hasSdcard(){
- String state = Environment.getExternalStorageState();
- if(state.equals(Environment.MEDIA_MOUNTED)){
- return true;
- }else{
- return false;
- }
- }
- }
本文转自xuzw13 51CTO博客,原文链接:http://blog.51cto.com/xuzhiwei/965511,如需转载请自行联系原作者