/p/9404515fde30
传送门
/jiaweizeng/BalaPortrait
设置头像通常有两种方式：
1，让用户通过选择本地相册之类的图片库中已有的图像，裁剪后作为头像。
2，让用户启动手机的相机拍照，拍完照片后裁剪，然后作为头像。
代码如下
MainActivity.Java文件：
package portrait.bala.portrait;import android.Manifest;import android.content.ContentValues;import android.content.Intent;import android.content.pm.PackageManager;import android.database.Cursor;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Matrix;import .Uri;import android.os.Build;import android.os.Bundle;import android.os.Environment;import android.provider.MediaStore;import android.support.annotation.NonNull;import android.support.v4.app.ActivityCompat;import android.support.v4.content.FileProvider;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.Button;import android.widget.ImageView;import android.widget.Toast;import java.io.ByteArrayOutputStream;import java.io.File;import java.io.FileNotFoundException;public class MainActivity extends AppCompatActivity {/* 头像文件 */private static final String IMAGE_FILE_NAME = "temp_head_image.jpg";private static final String CROP_IMAGE_FILE_NAME = "bala_crop.jpg";/* 请求识别码 */private static final int CODE_GALLERY_REQUEST = 0xa0;private static final int CODE_CAMERA_REQUEST = 0xa1;private static final int CODE_RESULT_REQUEST = 0xa2;// 裁剪后图片的宽(X)和高(Y),480 X 480的正方形。private static int output_X = 480;private static int output_Y = 480;//改变头像的标记位private int new_icon=0xa3;private ImageView headImage = null;private String mExtStorDir;private Uri mUriPath;private final int PERMISSION_READ_AND_CAMERA =0;//读和相机权限private final int PERMISSION_READ =1;//读取权限@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);mExtStorDir = Environment.getExternalStorageDirectory().toString();headImage = (ImageView) findViewById(R.id.imageView);Button buttonLocal = (Button) findViewById(R.id.buttonLocal);buttonLocal.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {//choseHeadImageFromGallery();checkReadPermission();}});Button buttonCamera = (Button) findViewById(R.id.buttonCamera);buttonCamera.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {//choseHeadImageFromCameraCapture();checkStoragePermission();//检查是否有权限}});}// 从本地相册选取图片作为头像private void choseHeadImageFromGallery() {// 设置文件类型 （在华为手机中不能获取图片，要替换代码）/*Intent intentFromGallery = new Intent();intentFromGallery.setType("image*//*");intentFromGallery.setAction(Intent.ACTION_GET_CONTENT);startActivityForResult(intentFromGallery, CODE_GALLERY_REQUEST);*/Intent intentFromGallery = new Intent(Intent.ACTION_PICK, null);intentFromGallery.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*");startActivityForResult(intentFromGallery, CODE_GALLERY_REQUEST);}// 启动手机相机拍摄照片作为头像private void choseHeadImageFromCameraCapture() {String savePath = mExtStorDir;Intent intent = null;// 判断存储卡是否可以用，可用进行存储if (hasSdcard()) {//设定拍照存放到自己指定的目录,可以先建好File file = new File(savePath);if (!file.exists()) {file.mkdirs();}Uri pictureUri;File pictureFile = new File(savePath, IMAGE_FILE_NAME);if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);pictureUri = FileProvider.getUriForFile(this, getPackageName()+".fileProvider", pictureFile);/*ContentValues contentValues = new ContentValues(1);contentValues.put(MediaStore.Images.Media.DATA, pictureFile.getAbsolutePath());pictureUri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, contentValues);*/} else {intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);pictureUri = Uri.fromFile(pictureFile);}/*if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);ContentValues contentValues = new ContentValues(1);contentValues.put(MediaStore.Images.Media.DATA, pictureFile.getAbsolutePath());pictureUri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, contentValues);} else {intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);pictureUri = Uri.fromFile(pictureFile);}*/if (intent != null) {intent.putExtra(MediaStore.EXTRA_OUTPUT,pictureUri);startActivityForResult(intent, CODE_CAMERA_REQUEST);}}}public Uri getImageContentUri(File imageFile) {String filePath = imageFile.getAbsolutePath();Cursor cursor = getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,new String[] { MediaStore.Images.Media._ID },MediaStore.Images.Media.DATA + "=? ",new String[] { filePath }, null);if (cursor != null && cursor.moveToFirst()) {int id = cursor.getInt(cursor.getColumnIndex(MediaStore.MediaColumns._ID));Uri baseUri = Uri.parse("content://media/external/images/media");return Uri.withAppendedPath(baseUri, "" + id);} else {if (imageFile.exists()) {ContentValues values = new ContentValues();values.put(MediaStore.Images.Media.DATA, filePath);return getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);} else {return null;}}}@Overrideprotected void onActivityResult(int requestCode, int resultCode,Intent intent) {// 用户没有进行有效的设置操作，返回if (resultCode == RESULT_CANCELED) {Toast.makeText(getApplication(), "取消", Toast.LENGTH_LONG).show();return;}switch (requestCode) {case CODE_GALLERY_REQUEST:cropRawPhoto(intent.getData());break;case CODE_CAMERA_REQUEST:if (hasSdcard()) {File tempFile = new File(Environment.getExternalStorageDirectory(),IMAGE_FILE_NAME);//cropRawPhoto(Uri.fromFile(tempFile));cropRawPhoto(getImageContentUri(tempFile));} else {Toast.makeText(getApplication(), "没有SDCard!", Toast.LENGTH_LONG).show();}break;case CODE_RESULT_REQUEST:/*if (intent != null) {setImageToHeadView(intent); //此代码在小米有异常，换以下代码}*/try {Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(mUriPath));setImageToHeadView(intent,bitmap);} catch (FileNotFoundException e) {e.printStackTrace();}break;}super.onActivityResult(requestCode, resultCode, intent);}private void checkStoragePermission() {int result = ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE);int resultCAMERA = ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA);if (result == PackageManager.PERMISSION_DENIED||resultCAMERA == PackageManager.PERMISSION_DENIED) {String[] permissions = {/*Manifest.permission.WRITE_EXTERNAL_STORAGE,*/Manifest.permission.CAMERA,Manifest.permission.READ_EXTERNAL_STORAGE};ActivityCompat.requestPermissions(this, permissions, PERMISSION_READ_AND_CAMERA);} else {choseHeadImageFromCameraCapture();}}private void checkReadPermission() {int permission = ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE);if (permission==PackageManager.PERMISSION_DENIED){String[] permissions ={Manifest.permission.READ_EXTERNAL_STORAGE};ActivityCompat.requestPermissions(this,permissions, PERMISSION_READ);}else {choseHeadImageFromGallery();}}//权限申请回调@Overridepublic void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {super.onRequestPermissionsResult(requestCode, permissions, grantResults);switch (requestCode){case PERMISSION_READ_AND_CAMERA:for (int i=0;i<grantResults.length;i++){if (grantResults[i]==PackageManager.PERMISSION_DENIED){Toast.makeText(this, "why ??????", Toast.LENGTH_SHORT).show();return;}}choseHeadImageFromCameraCapture();break;case PERMISSION_READ:if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {choseHeadImageFromGallery();}break;}}/*** 裁剪原始的图片*/public void cropRawPhoto(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 :宽高的比例intent.putExtra("aspectX", 1);intent.putExtra("aspectY", 1);// outputX , outputY : 裁剪图片宽高intent.putExtra("outputX", output_X);intent.putExtra("outputY", output_Y);intent.putExtra("return-data", true);//startActivityForResult(intent, CODE_RESULT_REQUEST); //直接调用此代码在小米手机有异常，换以下代码String mLinshi = System.currentTimeMillis() + CROP_IMAGE_FILE_NAME;File mFile = new File(mExtStorDir, mLinshi);// mHeadCachePath = mHeadCacheFile.getAbsolutePath();mUriPath = Uri.parse("file://" + mFile.getAbsolutePath());//将裁剪好的图输出到所建文件中intent.putExtra(MediaStore.EXTRA_OUTPUT, mUriPath);intent.putExtra("outputFormat", pressFormat.JPEG.toString());//注意：此处应设置return-data为false，如果设置为true，是直接返回bitmap格式的数据，耗费内存。设置为false，然后，设置裁剪完之后保存的路径，即：intent.putExtra(MediaStore.EXTRA_OUTPUT, uriPath);// intent.putExtra("return-data", true);intent.putExtra("return-data", false);// intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);startActivityForResult(intent, CODE_RESULT_REQUEST);}/*** 提取保存裁剪之后的图片数据，并设置头像部分的View*/private void setImageToHeadView(Intent intent,Bitmap b) {/*Bundle extras = intent.getExtras();if (extras != null) {Bitmap photo = extras.getParcelable("data");headImage.setImageBitmap(photo);}*/try {if (intent != null) {//Bitmap bitmap = imageZoom(b);//看个人需求，可以不压缩headImage.setImageBitmap(b);//long millis = System.currentTimeMillis();/*File file = FileUtil.saveFile(mExtStorDir, millis+CROP_IMAGE_FILE_NAME, bitmap);if (file!=null){//传递新的头像信息给我的界面Intent ii = new Intent();setResult(new_icon,ii);Glide.with(this).load(file).apply(RequestOptions.circleCropTransform())// .apply(RequestOptions.fitCenterTransform()).apply(RequestOptions.placeholderOf(R.mipmap.user_logo)).apply(RequestOptions.errorOf(R.mipmap.user_logo)).into(mIvTouxiangPersonal);//uploadImg(mExtStorDir,millis+CROP_IMAGE_FILE_NAME);uploadImg(mExtStorDir,millis+CROP_IMAGE_FILE_NAME);}*/}} catch (Exception e) {e.printStackTrace();}}/*** 检查设备是否存在SDCard的工具方法*/public static boolean hasSdcard() {String state = Environment.getExternalStorageState();if (state.equals(Environment.MEDIA_MOUNTED)) {// 有存储的SDCardreturn true;} else {return false;}}private Bitmap imageZoom(Bitmap bitMap) {//图片允许最大空间 单位：KBdouble maxSize =1000.00;//将bitmap放至数组中，意在bitmap的大小（与实际读取的原文件要大）ByteArrayOutputStream baos = new ByteArrayOutputStream();press(pressFormat.JPEG, 100, baos);byte[] b = baos.toByteArray();//将字节换成KBdouble mid = b.length/1024;//判断bitmap占用空间是否大于允许最大空间 如果大于则压缩 小于则不压缩if (mid > maxSize) {//获取bitmap大小 是允许最大大小的多少倍double i = mid / maxSize;//开始压缩 此处用到平方根 将宽带和高度压缩掉对应的平方根倍 （1.保持刻度和高度和原bitmap比率一致，压缩后也达到了最大大小占用空间的大小）bitMap = zoomImage(bitMap, bitMap.getWidth() / Math.sqrt(i),bitMap.getHeight() / Math.sqrt(i));}return bitMap;}/**** 图片的缩放方法** @param bgimage* ：源图片资源* @param newWidth* ：缩放后宽度* @param newHeight* ：缩放后高度* @return*/public static Bitmap zoomImage(Bitmap bgimage, double newWidth,double newHeight) {// 获取这个图片的宽和高float width = bgimage.getWidth();float height = bgimage.getHeight();// 创建操作图片用的matrix对象Matrix matrix = new Matrix();// 计算宽高缩放率float scaleWidth = ((float) newWidth) / width;float scaleHeight = ((float) newHeight) / height;// 缩放图片动作matrix.postScale(scaleWidth, scaleHeight);Bitmap bitmap = Bitmap.createBitmap(bgimage, 0, 0, (int) width,(int) height, matrix, true);return bitmap;}}
布局文件有三个组件：放置头像的ImageView，两个Button，其中一个Button触发从本地相册选取图片作为头像的操作时间；另外一个Button触发手机拍摄照片作为头像的操作事件。activity_main.xml：
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical" ><ImageViewandroid:id="@+id/imageView"android:layout_width="wrap_content"android:layout_height="wrap_content"android:src="@mipmap/ic_launcher" /><Buttonandroid:id="@+id/buttonLocal"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="本地相册选取头像" /><Buttonandroid:id="@+id/buttonCamera"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="手机拍照选取头像" /></LinearLayout>
还要权限动态申请 WRITE_EXTERNAL_STORAGE
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
解决7.0 不能直接暴露获取SD卡路径的方法
在清单文件中添加provider，
FileUriExposedException
https://developer./reference/android/os/FileUriExposedException.html
FileProvider
https://developer./reference/android/support/v4/content/FileProvider.html
创建XML文件夹
file_paths.xml
<paths><external-path path="Android/data/portrait.bala.portrait/" name="files_root" /><external-path path="." name="external_storage_root" /><external-path name="external_files" path="."/></paths>
或者
<paths><external-path name="external_files" path="."/></paths>
要修改包名
<providerandroid:name="android.support.v4.content.FileProvider"android:authorities="portrait.bala.portrait.fileProvider"android:exported="false"android:grantUriPermissions="true"><meta-dataandroid:name="android.support.FILE_PROVIDER_PATHS"android:resource="@xml/file_paths"/></provider>
在application类中添加如下代码
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();if (Build.VERSION.SDK_INT >= 18){builder.detectFileUriExposure();}StrictMode.setVmPolicy(builder.build());
FileUtil
public class FileUtil {/*** 获取目录文件大小** @param dir* @return*/public static long getDirSize(File dir) {if (dir == null) {return 0;}if (!dir.isDirectory()) {return 0;}long dirSize = 0;File[] files = dir.listFiles();for (File file : files) {if (file.isFile()) {dirSize += file.length();} else if (file.isDirectory()) {dirSize += file.length();dirSize += getDirSize(file); // 递归调用继续统计}}return dirSize;}/*** 转换文件大小** @param fileS* @return B/KB/MB/GB*/public static String formatFileSize(long fileS) {java.text.DecimalFormat df = new java.text.DecimalFormat("#.00");String fileSizeString = "";if (fileS < 1024) {fileSizeString = df.format((double) fileS) + "B";} else if (fileS < 1048576) {fileSizeString = df.format((double) fileS / 1024) + "KB";} else if (fileS < 1073741824) {fileSizeString = df.format((double) fileS / 1048576) + "MB";} else {fileSizeString = df.format((double) fileS / 1073741824) + "G";}return fileSizeString;}public static File saveFile(String filePath,String fileName, Bitmap bitmap){ByteArrayOutputStream baos =new ByteArrayOutputStream();press(pressFormat.JPEG,100,baos);byte[] bytes = baos.toByteArray();try {File file = new File(filePath, fileName);FileOutputStream fos = new FileOutputStream(file);fos.write(bytes);fos.close();return file;} catch (Exception e) {e.printStackTrace();return null;}}}
URI转成图片路径
if (data != null) {// 获取圖片URIval uri = data.data// 将URI转换为路径：val proj = arrayOf(MediaStore.Images.Media.DATA)val cursor = managedQuery(uri, proj, null, null, null)// 这个是获得用户选择的图片的索引值val columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA)cursor.moveToFirst()// 最后根据索引值获取图片路径val photoPath = cursor.getString(columnIndex)}
