首先配置一下我们的项目
（1）在build.gradle里添加类库：
compile 'de.hdodenhof:circleimageview:2.0.0'
（2）设置清单文件
2.1、在清单文件里面添加权限
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />2.2、在清单文件里面添加provider
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="com.zz.fileprovider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/file_paths" />
</provider>
（3）在res目录下，新建一个xml文件夹，在xml文件夹里面，新建一个文件：file_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<paths>
<external-path
name="camera_photos"
path="" />
</paths>
</resources>
（4）新建布局文件
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">
<de.hdodenhof.circleimageview.CircleImageView
android:id="@+id/photo"
android:layout_width="150dp"
android:layout_height="150dp"
android:layout_centerHorizontal="true"
android:src="@mipmap/a1"/>
<Button
android:id="@+id/takePic"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@id/photo"
android:text="打开相机"
android:layout_marginTop="50dp"
android:layout_centerHorizontal="true"/>
<Button
android:id="@+id/takeGallery"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/takePic"
android:layout_marginTop="20dp"
android:text="打开相册"
android:layout_centerHorizontal="true"/>
</RelativeLayout>
（5）在MainActivity中调用方法
//参考网址 https://github.com/zhengzhong1/Android6.0PermissionsDemo
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
private CircleImageView photo;
private Button takePic;
private Button takeGallery;
private static final int CODE_GALLERY_REQUEST = 0xa0;
private static final int CODE_CAMERA_REQUEST = 0xa1;
private static final int CODE_RESULT_REQUEST = 0xa2;
private static final int CAMERA_PERMISSIONS_REQUEST_CODE = 0x03;
private static final int STORAGE_PERMISSIONS_REQUEST_CODE = 0x04;
private File fileUri = new File(Environment.getExternalStorageDirectory().getPath() + "/photo.jpg");
private File fileCropUri = new File(Environment.getExternalStorageDirectory().getPath() + "/crop_photo.jpg");
private Uri imageUri;
private Uri cropImageUri;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_name);
photo = (CircleImageView)findViewById(R.id.photo);
takePic = (Button)findViewById(R.id.takePic);
takeGallery = (Button)findViewById(R.id.takeGallery);
takePic.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
autoObtainCameraPermission();
}
});
takeGallery.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
autoObtainStoragePermission();
}
});
}
/**
* 自动获取相机权限
*/
private void autoObtainCameraPermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED
|| ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.CAMERA)) {
ToastUtils.showShort(this, "您已经拒绝过一次");
}
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA, Manifest.permission.READ_EXTERNAL_STORAGE}, CAMERA_PERMISSIONS_REQUEST_CODE);
} else {//有权限直接调用系统相机拍照
if (hasSdcard()) {
imageUri = Uri.fromFile(fileUri);
//通过FileProvider创建一个content类型的Uri
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
imageUri = FileProvider.getUriForFile(MainActivity.this, "com.zz.fileprovider", fileUri);
}
PhotoUtils.takePicture(this, imageUri, CODE_CAMERA_REQUEST);
} else {
ToastUtils.showShort(this, "设备没有SD卡！");
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
//调用系统相机申请拍照权限回调
case CAMERA_PERMISSIONS_REQUEST_CODE: {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
if (hasSdcard()) {
imageUri = Uri.fromFile(fileUri);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N)
imageUri = FileProvider.getUriForFile(MainActivity.this, "com.zz.fileprovider", fileUri);//通过FileProvider创建一个content类型的Uri
PhotoUtils.takePicture(this, imageUri, CODE_CAMERA_REQUEST);
} else {
ToastUtils.showShort(this, "设备没有SD卡！");
}
} else {
ToastUtils.showShort(this, "请允许打开相机！！");
}
break;
}
//调用系统相册申请Sdcard权限回调
case STORAGE_PERMISSIONS_REQUEST_CODE:
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
PhotoUtils.openPic(this, CODE_GALLERY_REQUEST);
} else {
ToastUtils.showShort(this, "请允许打操作SDCard！！");
}
break;
default:
}
}
private static final int OUTPUT_X = 480;
private static final int OUTPUT_Y = 480;
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
switch (requestCode) {
//拍照完成回调
case CODE_CAMERA_REQUEST:
cropImageUri = Uri.fromFile(fileCropUri);
PhotoUtils.cropImageUri(this, imageUri, cropImageUri, 1, 1, OUTPUT_X, OUTPUT_Y, CODE_RESULT_REQUEST);
break;
//访问相册完成回调
case CODE_GALLERY_REQUEST:
if (hasSdcard()) {
cropImageUri = Uri.fromFile(fileCropUri);
Uri newUri = Uri.parse(PhotoUtils.getPath(this, data.getData()));
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
newUri = FileProvider.getUriForFile(this, "com.zz.fileprovider", new File(newUri.getPath()));
}
PhotoUtils.cropImageUri(this, newUri, cropImageUri, 1, 1, OUTPUT_X, OUTPUT_Y, CODE_RESULT_REQUEST);
} else {
ToastUtils.showShort(this, "设备没有SD卡！");
}
break;
case CODE_RESULT_REQUEST:
Bitmap bitmap = PhotoUtils.getBitmapFromUri(cropImageUri, this);
if (bitmap != null) {
showImages(bitmap);
}
break;
default:
}
}
}
/**
* 自动获取sdk权限
*/
private void autoObtainStoragePermission() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, STORAGE_PERMISSIONS_REQUEST_CODE);
} else {
PhotoUtils.openPic(this, CODE_GALLERY_REQUEST);
}
}
private void showImages(Bitmap bitmap) {
photo.setImageBitmap(bitmap);
}
/**
* 检查设备是否存在SDCard的工具方法
*/
public static boolean hasSdcard() {
String state = Environment.getExternalStorageState();
return state.equals(Environment.MEDIA_MOUNTED);
}
}
（5）Toast统一管理类
public class ToastUtils
{
private ViewGroup.LayoutParams layoutParams;
private ToastUtils()
{
/* cannot be instantiated */
throw new UnsupportedOperationException("cannot be instantiated");
}
public static boolean isShow = true;
/**
* 短时间显示Toast
*
* @param context
* @param message
*/
public static void showShort(Context context, CharSequence message)
{
if (isShow)
Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
}
/**
* 短时间显示Toast
*
* @param context
* @param message
*/
public static void showShort(Context context, int message)
{
if (isShow)
Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
}
/**
* 长时间显示Toast
*
* @param context
* @param message
*/
public static void showLong(Context context, CharSequence message)
{
if (isShow)
Toast.makeText(context, message, Toast.LENGTH_LONG).show();
}
/**
* 长时间显示Toast
*
* @param context
* @param message
*/
public static void showLong(Context context, int message)
{
if (isShow)
Toast.makeText(context, message, Toast.LENGTH_LONG).show();
}
/**
* 自定义显示Toast时间
*
* @param context
* @param message
* @param duration
*/
public static void show(Context context, CharSequence message, int duration)
{
if (isShow)
Toast.makeText(context, message, duration).show();
}
/**
* 自定义显示Toast时间
*
* @param context
* @param message
* @param duration
*/
public static void show(Context context, int message, int duration)
{
if (isShow)
Toast.makeText(context, message, duration).show();
}
}
（6）图片处理类 PhotoUtils
public class PhotoUtils {
private static final String TAG = "PhotoUtils";
/**
* @param activity 当前activity
* @param imageUri 拍照后照片存储路径
* @param requestCode 调用系统相机请求码
*/
public static void takePicture(Activity activity, Uri imageUri, int requestCode) {
//调用系统相机
Intent intentCamera = new Intent();
intentCamera.setAction(MediaStore.ACTION_IMAGE_CAPTURE);
//将拍照结果保存至photo_file的Uri中，不保留在相册中
intentCamera.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
activity.startActivityForResult(intentCamera, requestCode);
}
/**
* @param activity 当前activity
* @param requestCode 打开相册的请求码
*/
public static void openPic(Activity activity, int requestCode) {
Intent photoPickerIntent = new Intent(Intent.ACTION_GET_CONTENT);
photoPickerIntent.setType("image/*");
activity.startActivityForResult(photoPickerIntent, requestCode);
}
/**
* @param activity 当前activity
* @param orgUri 剪裁原图的Uri
* @param desUri 剪裁后的图片的Uri
* @param aspectX X方向的比例
* @param aspectY Y方向的比例
* @param width 剪裁图片的宽度
* @param height 剪裁图片高度
* @param requestCode 剪裁图片的请求码
*/
public static void cropImageUri(Activity activity, Uri orgUri, Uri desUri, int aspectX, int aspectY, int width, int height, int requestCode) {
Intent intent = new Intent("com.android.camera.action.CROP");
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
}
intent.setDataAndType(orgUri, "image/*");
//发送裁剪信号
intent.putExtra("crop", "true");
intent.putExtra("aspectX", aspectX);
intent.putExtra("aspectY", aspectY);
intent.putExtra("outputX", width);
intent.putExtra("outputY", height);
intent.putExtra("scale", true);
//将剪切的图片保存到目标Uri中
intent.putExtra(MediaStore.EXTRA_OUTPUT, desUri);
//1-false用uri返回图片
//2-true直接用bitmap返回图片（此种只适用于小图片，返回图片过大会报错）
intent.putExtra("return-data", false);
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
intent.putExtra("noFaceDetection", true);
activity.startActivityForResult(intent, requestCode);
}
/**
* 读取uri所在的图片
*
* @param uri 图片对应的Uri
* @param mContext 上下文对象
* @return 获取图像的Bitmap
*/
public static Bitmap getBitmapFromUri(Uri uri, Context mContext) {
try {
Bitmap bitmap = MediaStore.Images.Media.getBitmap(mContext.getContentResolver(), uri);
return bitmap;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* @param context 上下文对象
* @param uri 当前相册照片的Uri
* @return 解析后的Uri对应的String
*/
@SuppressLint("NewApi")
public static String getPath(final Context context, final Uri uri) {
final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
String pathHead = "file:///";
// 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 pathHead + 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 pathHead + 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 pathHead + getDataColumn(context, contentUri, selection, selectionArgs);
}
}
// MediaStore (and general)
else if ("content".equalsIgnoreCase(uri.getScheme())) {
return pathHead + getDataColumn(context, uri, null, null);
}
// File
else if ("file".equalsIgnoreCase(uri.getScheme())) {
return pathHead + uri.getPath();
}
return null;
}
/**
* Get the value of the data column for this Uri. This is useful for
* MediaStore Uris, and other file-based ContentProviders.
*
* @param context The context.
* @param uri The Uri to query.
* @param selection (Optional) Filter used in the query.
* @param selectionArgs (Optional) Selection arguments used in the query.
* @return The value of the _data column, which is typically a file path.
*/
private 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 column_index = cursor.getColumnIndexOrThrow(column);
return cursor.getString(column_index);
}
} finally {
if (cursor != null)
cursor.close();
}
return null;
}
/**
* @param uri The Uri to check.
* @return Whether the Uri authority is ExternalStorageProvider.
*/
private 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.
*/
private 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.
*/
private static boolean isMediaDocument(Uri uri) {
return "com.android.providers.media.documents".equals(uri.getAuthority());
}
}
