Android开发--通过相册或拍照选择头像

        像一些需要显示个人资料的App中，选择并修改自己的个人头像是必须的，最近的项目中也有用到，做个笔记吧。总体的思路是，通过startActivityForResult方法，分别传递调用系统相册的Intent和调用相机拍照的Intent来做选择，之后调用Android系统中自带的图片剪裁，实现图片的剪裁并在onActivityResult方法中获取数据。下面来进行实践：

        1.点击拍照的按钮，则调用系统照相机，并把自己所拍摄的照片保存则自定义路径之下

private void getPicFromCamera() {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// 下面这句指定调用<span id="18_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="18_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=%CF%E0%BB%FA&k0=%CF%E0%BB%FA&kdi0=0&luki=5&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="18" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">相机</span></a></span>拍照后的照片存储的路径
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(
Environment.getExternalStorageDirectory(), "test.jpg")));
startActivityForResult(intent, CAMERA_REQUEST);
}

         接下来在onActivityResult方法中处理，如果resultCode为-1则表示拍照成功，执行图片剪裁的方法（图片剪裁的方法的稍后叙述）。

case CAMERA_REQUEST:
<span id="16_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="16_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=switch&k0=switch&kdi0=0&luki=9&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="16" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">switch</span></a></span> (resultCode) {
case -1://-1表示拍照成功
File file = new File(Environment.getExternalStorageDirectory()
+ "/test.jpg");
if (file.exists()) {
<span id="17_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="17_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=photo&k0=photo&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="17" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">photo</span></a></span>Clip(Uri.fromFile(file));
}
break;
default:
break;
}
break;

            2.点击相册，调用系统相册

private void getPicFromPhoto() {
Intent intent = new Intent(Intent.ACTION_PICK, null);
intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
"image/*");
startActivityForResult(intent, PHOTO_REQUEST);
}

             接下来在onActivityResult方法中处理，如果data不为null，则表示选取成功，执行图片剪裁的方法（图片剪裁的方法的稍后叙述）。

                case PHOTO_REQUEST:
if (data != null) {
<span id="15_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="15_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=photo&k0=photo&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="15" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">photo</span></a></span>Clip(data.getData());
}
break;

            3.调用系统的图片剪裁进行图片的修理

private void photoClip(Uri uri) {
// 调用系统中自带的图片剪裁
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/*");
// 设置在开启的Intent中设置显示的VIEW可裁剪
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", 150);
intent.putExtra("outputY", 150);
intent.putExtra("return-<span id="14_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="14_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=data&k0=data&kdi0=0&luki=10&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="14" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">data</span></a></span>", true);
startActivityForResult(intent, PHOTO_CLIP);
}

              接下来在onActivityResult方法中处理，得到处理后的数据，并显示于ImageView之上

case PHOTO_CLIP:
if (data != null) {
Bundle extras = data.getExtras();
if (extras != null) {
Log.w("test", "data");
Bitmap <span id="13_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="13_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=photo&k0=photo&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="13" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">photo</span></a></span> = extras.getParcelable("data");
mImageView.setImageBitmap(photo);
}
}
break;

附上整体

package com.example.test;

import
cf06
java.io.File;

import android.<span id="1_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="1_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=app&k0=app&kdi0=0&luki=6&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="1" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">app</span></a></span>.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.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends Activity implements OnClickListener {

private Button <span id="2_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="2_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=photo&k0=photo&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="2" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">photo</span></a></span>Button;
private Button cameraButton;
private ImageView mImageView;

private static final int PHOTO_REQUEST = 1;
private static final int CAMERA_REQUEST = 2;
private static final int PHOTO_CLIP = 3;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
photoButton = (Button) findViewById(R.id.main_btn_<span id="3_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="3_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=photo&k0=photo&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="3" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">photo</span></a></span>);
cameraButton = (Button) findViewById(R.id.main_btn_camera);
mImageView = (ImageView) findViewById(R.id.main_img);
photoButton.setOnClickListener(this);
cameraButton.setOnClickListener(this);

}

@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
<span id="4_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="4_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=switch&k0=switch&kdi0=0&luki=9&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="4" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">switch</span></a></span> (arg0.getId()) {
case R.id.main_btn_camera:
getPicFromCamera();
break;

case R.id.main_btn_<span id="5_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="5_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=photo&k0=photo&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="5" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">photo</span></a></span>:
getPicFromPhoto();
break;
default:
break;
}
}

private void getPicFromPhoto() {
Intent intent = new Intent(Intent.ACTION_PICK, null);
intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
"image/*");
startActivityForResult(intent, PHOTO_REQUEST);
}

private void getPicFromCamera() {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// 下面这句指定调用<span id="6_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="6_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=%CF%E0%BB%FA&k0=%CF%E0%BB%FA&kdi0=0&luki=5&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="6" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">相机</span></a></span>拍照后的照片存储的路径
intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(new File(
Environment.getExternalStorageDirectory(), "test.jpg")));
startActivityForResult(intent, CAMERA_REQUEST);
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent <span id="7_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="7_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=data&k0=data&kdi0=0&luki=10&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="7" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">data</span></a></span>) {
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);
<span id="8_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="8_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=switch&k0=switch&kdi0=0&luki=9&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="8" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">switch</span></a></span> (requestCode) {
case CAMERA_REQUEST:
switch (resultCode) {
case -1://-1表示拍照成功
File file = new File(Environment.getExternalStorageDirectory()
+ "/test.jpg");
if (file.exists()) {
<span id="9_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="9_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=photo&k0=photo&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="9" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">photo</span></a></span>Clip(Uri.fromFile(file));
}
break;
default:
break;
}
break;
case PHOTO_REQUEST:
if (<span id="10_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="10_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=data&k0=data&kdi0=0&luki=10&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="10" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">data</span></a></span> != null) {
photoClip(data.getData());
}
break;
case PHOTO_CLIP:
if (data != null) {
Bundle extras = data.getExtras();
if (extras != null) {
Log.w("test", "data");
Bitmap photo = extras.getParcelable("data");
mImageView.setImageBitmap(photo);
}
}
break;
default:
break;
}

}

private void <span id="11_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="11_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=photo&k0=photo&kdi0=0&luki=7&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="11" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">photo</span></a></span>Clip(Uri uri) {
// 调用系统中自带的图片剪裁
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/*");
// 下面这个crop=true是设置在开启的Intent中设置显示的VIEW可裁剪
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", 150);
intent.putExtra("outputY", 150);
intent.putExtra("return-<span id="12_nwp" style="width: auto; height: auto; float: none;"><a target=_blank id="12_nwl" href="http://cpro.baidu.com/cpro/ui/uijs.php?adclass=0&app_id=0&c=news&cf=1001&ch=0&di=128&fv=18&is_app=0&jk=26ce0e82a9ad318&k=data&k0=data&kdi0=0&luki=10&mcpm=0&n=10&p=baidu&q=85048100_cpr&rb=0&rs=1&seller_id=1&sid=18d39a2ae8e06c02&ssp2=1&stid=9&t=tpclicked3_hc&td=1797308&tu=u1797308&u=http%3A%2F%2Fwww%2Ecodes51%2Ecom%2Farticle%2Fdetail%5F99155%2Ehtml&urlid=0" target="_blank" mpid="12" style="color: rgb(0, 0, 0); text-decoration: none;"><span style="color: rgb(0, 0, 255); width: auto; height: auto;">data</span></a></span>", true);
startActivityForResult(intent, PHOTO_CLIP);
}

}