android拍照或相册获取头像（兼容4.4以下，4.4，5.0，6.0版本）

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="com.android.vending.BILLING" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />

<pre name="code" class="java">public class MainActivity extends Activity implements View.OnClickListener {
private RelativeLayout mAcountHeadIconLayout;
private ImageView mAcountHeadIcon;

//保存图片本地路径
public static final String ACCOUNT_DIR = Environment.getExternalStorageDirectory().getPath()
+ "/account/";
public static final String ACCOUNT_MAINTRANCE_ICON_CACHE = "icon_cache/";
private static final String IMGPATH = ACCOUNT_DIR + ACCOUNT_MAINTRANCE_ICON_CACHE;

private static final String IMAGE_FILE_NAME = "faceImage.jpeg";
private static final String TMP_IMAGE_FILE_NAME = "tmp_faceImage.jpeg";

//常量定义
public static final int TAKE_A_PICTURE = 10;
public static final int SELECT_A_PICTURE = 20;
public static final int SET_PICTURE = 30;
public static final int SET_ALBUM_PICTURE_KITKAT = 40;
public static final int SELECET_A_PICTURE_AFTER_KIKAT = 50;
private String mAlbumPicturePath = null;

File fileone = null;
File filetwo = null;

//版本比较：是否是4.4及以上版本
final boolean mIsKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

mAcountHeadIconLayout = (RelativeLayout) findViewById(R.id.account_head_item);
mAcountHeadIconLayout.setOnClickListener(this);
mAcountHeadIcon = (ImageView) findViewById(R.id.head_value);
mAcountHeadIcon.setOnClickListener(this);
File directory = new File(ACCOUNT_DIR);
File imagepath = new File(IMGPATH);
if (!directory.exists()) {
Log.i("zou", "directory.mkdir()");
directory.mkdir();
}
if (!imagepath.exists()) {
Log.i("zou", "imagepath.mkdir()");
imagepath.mkdir();
}

fileone = new File(IMGPATH, IMAGE_FILE_NAME);
filetwo = new File(IMGPATH, TMP_IMAGE_FILE_NAME);

try {
if (!fileone.exists() && !filetwo.exists()) {
fileone.createNewFile();
filetwo.createNewFile();
}
} catch (Exception e) {
}
}
@Override
public void onClick(View v) {
if (v.getId() == R.id.account_head_item) {
new AlertDialog.Builder(this).setTitle("设置头像")
.setNegativeButton("相册", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
if (mIsKitKat) {
selectImageUriAfterKikat();
} else {
cropImageUri();
}
}
}).setPositiveButton("相机", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(new File(IMGPATH, IMAGE_FILE_NAME)));
startActivityForResult(intent, TAKE_A_PICTURE);
Log.i("zou", "TAKE_A_PICTURE");
}
}).show();
}
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == SELECT_A_PICTURE) {
if (resultCode == RESULT_OK && null != data) {
//				Log.i("zou", "4.4以下的");
Bitmap bitmap = decodeUriAsBitmap(Uri.fromFile(new File(IMGPATH,
TMP_IMAGE_FILE_NAME)));
mAcountHeadIcon.setImageBitmap(bitmap);
} else if (resultCode == RESULT_CANCELED) {
Toast.makeText(MainActivity.this, "取消头像设置", Toast.LENGTH_SHORT).show();
}
} else if (requestCode == SELECET_A_PICTURE_AFTER_KIKAT) {
if (resultCode == RESULT_OK && null != data) {
//				Log.i("zou", "4.4以上的");
mAlbumPicturePath = getPath(getApplicationContext(), data.getData());
cropImageUriAfterKikat(Uri.fromFile(new File(mAlbumPicturePath)));
} else if (resultCode == RESULT_CANCELED) {
Toast.makeText(MainActivity.this, "取消头像设置", Toast.LENGTH_SHORT).show();
}
} else if (requestCode == SET_ALBUM_PICTURE_KITKAT) {
Log.i("zou", "4.4以上上的 RESULT_OK");

Bitmap bitmap = decodeUriAsBitmap(Uri.fromFile(new File(IMGPATH, TMP_IMAGE_FILE_NAME)));
mAcountHeadIcon.setImageBitmap(bitmap);

//			Log.i("zou", "4.4以上上的 RESULT_OK");
//			Bitmap bitmap = data.getParcelableExtra("data");
//			mAcountHeadIcon.setImageBitmap(bitmap);
} else if (requestCode == TAKE_A_PICTURE) {
Log.i("zou", "TAKE_A_PICTURE-resultCode:" + resultCode);
if (resultCode == RESULT_OK) {
cameraCropImageUri(Uri.fromFile(new File(IMGPATH, IMAGE_FILE_NAME)));
} else {
Toast.makeText(MainActivity.this, "取消头像设置", Toast.LENGTH_SHORT).show();
}
} else if (requestCode == SET_PICTURE) {
//拍照的设置头像  不考虑版本
//			Log.i("zou", "SET_PICTURE-resultCode:" + resultCode);
Bitmap bitmap = null;
//			if (mIsKitKat) {  //高版本
//				if (null != data) {
//					bitmap = data.getParcelableExtra("data");
//					showLoading();
//					mAccountControl.resetGoUserIcon(bitmap2byte(bitmap), this);
//				} else {  //高版本不能通过“data”获取到图片数据的就用uri
//					if (resultCode == RESULT_OK) {
//						bitmap = decodeUriAsBitmap(Uri.fromFile(new File(IMGPATH, IMAGE_FILE_NAME)));
//						showLoading();
//						mAccountControl.resetGoUserIcon(bitmap2byte(bitmap), this);
//					}
//				}
//			} else {  //低版本
if (resultCode == RESULT_OK && null != data) {
bitmap = decodeUriAsBitmap(Uri.fromFile(new File(IMGPATH, IMAGE_FILE_NAME)));
mAcountHeadIcon.setImageBitmap(bitmap);
} else if (resultCode == RESULT_CANCELED) {
Toast.makeText(MainActivity.this, "取消头像设置", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(MainActivity.this, "设置头像失败", Toast.LENGTH_SHORT).show();
}
//			}
}
}

/** <br>功能简述:裁剪图片方法实现---------------------- 相册
* <br>功能详细描述:
* <br>注意:
*/
private void cropImageUri() {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);
intent.setType("image/*");
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("outputX", 640);
intent.putExtra("outputY", 640);
intent.putExtra("scale", true);
intent.putExtra("return-data", false);
intent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(new File(IMGPATH, TMP_IMAGE_FILE_NAME)));
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
intent.putExtra("noFaceDetection", true); // no face detection
startActivityForResult(intent, SELECT_A_PICTURE);
}

/**
*  <br>功能简述:4.4以上裁剪图片方法实现---------------------- 相册
* <br>功能详细描述:
* <br>注意:
*/
@TargetApi(Build.VERSION_CODES.KITKAT)
private void selectImageUriAfterKikat() {
Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
intent.addCategory(Intent.CATEGORY_OPENABLE);
intent.setType("image/*");
startActivityForResult(intent, SELECET_A_PICTURE_AFTER_KIKAT);
}

/**
* <br>功能简述:裁剪图片方法实现----------------------相机
* <br>功能详细描述:
* <br>注意:
* @param uri
*/
private void cameraCropImageUri(Uri uri) {
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/jpeg");
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("outputX", 640);
intent.putExtra("outputY", 640);
intent.putExtra("scale", true);
//		if (mIsKitKat) {
//			intent.putExtra("return-data", true);
//			intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
//		} else {
intent.putExtra("return-data", false);
intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
//		}
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
intent.putExtra("noFaceDetection", true);
startActivityForResult(intent, SET_PICTURE);
}

/**
* <br>功能简述: 4.4及以上改动版裁剪图片方法实现 --------------------相机
* <br>功能详细描述:
* <br>注意:
* @param uri
*/
private void cropImageUriAfterKikat(Uri uri) {
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/jpeg");
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("outputX", 640);
intent.putExtra("outputY", 640);
intent.putExtra("scale", true);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
intent.putExtra("noFaceDetection", true);
intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
intent.putExtra("return-data", false);//设置为不返回数据
}else{
intent.putExtra("return-data", true);//设置为不返回数据
}
startActivityForResult(intent, SET_ALBUM_PICTURE_KITKAT);
}

/**
* <br>功能简述:
* <br>功能详细描述:
* <br>注意:
* @param uri
* @return
*/
private Bitmap decodeUriAsBitmap(Uri uri) {
Bitmap bitmap = null;
try {
bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri));
} catch (FileNotFoundException e) {
e.printStackTrace();
return null;
}
return bitmap;
}

/**
* <br>功能简述:4.4及以上获取图片的方法
* <br>功能详细描述:
* <br>注意:
* @param context
* @param uri
* @return
*/
@TargetApi(Build.VERSION_CODES.KITKAT)
public static String getPath(final Context context, final Uri uri) {

final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;

// DocumentProvider
if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
// ExternalStorageProvider
if (isExternalStorageDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];

if ("primary".equalsIgnoreCase(type)) {
return Environment.getExternalStorageDirectory() + "/" + split[1];
}
}
// DownloadsProvider
else if (isDownloadsDocument(uri)) {

final String id = DocumentsContract.getDocumentId(uri);
final Uri contentUri = ContentUris.withAppendedId(
Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));

return getDataColumn(context, contentUri, null, null);
}
// MediaProvider
else if (isMediaDocument(uri)) {
final String docId = DocumentsContract.getDocumentId(uri);
final String[] split = docId.split(":");
final String type = split[0];

Uri contentUri = null;
if ("image".equals(type)) {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
} else if ("video".equals(type)) {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
} else if ("audio".equals(type)) {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
}

final String selection = "_id=?";
final String[] selectionArgs = new String[] { split[1] };

return getDataColumn(context, contentUri, selection, selectionArgs);
}
}
// MediaStore (and general)
else if ("content".equalsIgnoreCase(uri.getScheme())) {

// Return the remote address
if (isGooglePhotosUri(uri))
return uri.getLastPathSegment();

return getDataColumn(context, uri, null, null);
}
// File
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return uri.getPath();
}

return null;
}

public static String getDataColumn(Context context, Uri uri, String selection,
String[] selectionArgs) {

Cursor cursor = null;
final String column = "_data";
final String[] projection = { column };

try {
cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
null);
if (cursor != null && cursor.moveToFirst()) {
final int index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}

/**
* @param uri The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
public static boolean isExternalStorageDocument(Uri uri) {
return "com.android.externalstorage.documents".equals(uri.getAuthority());
}

/**
* @param uri The Uri to check.
* @return Whether the Uri authority is DownloadsProvider.
*/
public static boolean isDownloadsDocument(Uri uri) {
return "com.android.providers.downloads.documents".equals(uri.getAuthority());
}

/**
* @param uri The Uri to check.
* @return Whether the Uri authority is MediaProvider.
*/
public static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}

/**
* @param uri The Uri to check.
* @return Whether the Uri authority is Google Photos.
*/
public static boolean isGooglePhotosUri(Uri uri) {
return "com.google.android.apps.photos.content".equals(uri.getAuthority());
}

}