5.21学习总结——android开发实现用户头像的上传
最近在做个人头像的上传，具体是能调用摄像头和从相册进行选择。本篇文章参考的我的同学的博客，大家有兴趣可以去原作者那里去看看:
1.使用glide进行图片的展示效果
2.PermissionGen动态权限获取
代码：
一、准备工作
1.在AndroidManifest.xml添加权限
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE\_EXTERNAL\_STORAGE" />
<uses-permission android:name="android.permission.READ\_EXTERNAL\_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />2.在build.gradle中添加依赖
dependencies {
implementation 'com.github.bumptech.glide:glide:4.10.0'
implementation 'com.lovedise:permissiongen:0.0.6'}
二、主代码
1.util工具类（toast和照片）
import android.content.Context;
import android.widget.Toast;
public class ToastUtil {
public static Toast mToast;
public static void showMsg(Context context, String msg){
if(mToast == null){
mToast = Toast.makeText(context,msg,Toast.LENGTH_SHORT);
}else{
mToast.setText(msg);
}
mToast.show();
}
}
Toast
Toast
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.provider.MediaStore;
import androidx.appcompat.app.AppCompatActivity;
import java.io.File;
/**
* CSDN_LQR
* 图片选择工具类
*/
public class LQRPhotoSelectUtils {
public static final int REQ\_TAKE\_PHOTO = 10001;
public static final int REQ\_SELECT\_PHOTO = 10002;
public static final int REQ\_ZOOM\_PHOTO = 10003;
private AppCompatActivity mActivity;
//拍照或剪切后图片的存放位置(参考file\_provider\_paths.xml中的路径)
private String imgPath = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + String.valueOf(System.currentTimeMillis()) + ".jpg";
//FileProvider的主机名：一般是包名+".fileprovider"，严格上是build.gradle中defaultConfig{}中applicationId对应的值+".fileprovider"
private String AUTHORITIES = "packageName" + ".fileprovider";
private boolean mShouldCrop = false;//是否要裁剪（默认不裁剪）
private Uri mOutputUri = null;
private File mInputFile;
private File mOutputFile = null;
//剪裁图片宽高比
private int mAspectX = 1;
private int mAspectY = 1;
//剪裁图片大小
private int mOutputX = 800;
private int mOutputY = 480;
PhotoSelectListener mListener;
/\*\*
\* 可指定是否在拍照或从图库选取照片后进行裁剪
\* <p>
\* 默认裁剪比例1:1，宽度为800，高度为480
\*
\* @param activity 上下文
\* @param listener 选取图片监听
\* @param shouldCrop 是否裁剪
\*/
public LQRPhotoSelectUtils(AppCompatActivity activity, PhotoSelectListener listener, boolean shouldCrop) {
mActivity = activity;
mListener = listener;
mShouldCrop = shouldCrop;
AUTHORITIES = activity.getPackageName() + ".fileprovider";
imgPath = generateImgePath();
}
/\*\*
\* 可以拍照或从图库选取照片后裁剪的比例及宽高
\*
\* @param activity 上下文
\* @param listener 选取图片监听
\* @param aspectX 图片裁剪时的宽度比例
\* @param aspectY 图片裁剪时的高度比例
\* @param outputX 图片裁剪后的宽度
\* @param outputY 图片裁剪后的高度
\*/
public LQRPhotoSelectUtils(AppCompatActivity activity, PhotoSelectListener listener, int aspectX, int aspectY, int outputX, int outputY) {
this(activity, listener, true);
mAspectX = aspectX;
mAspectY = aspectY;
mOutputX = outputX;
mOutputY = outputY;
}
/\*\*
\* 设置FileProvider的主机名：一般是包名+".fileprovider"，严格上是build.gradle中defaultConfig{}中applicationId对应的值+".fileprovider"
\* <p>
\* 该工具默认是应用的包名+".fileprovider"，如项目build.gradle中defaultConfig{}中applicationId不是包名，则必须调用此方法对FileProvider的主机名进行设置，否则Android7.0以上使用异常
\*
\* @param authorities FileProvider的主机名
\*/
public void setAuthorities(String authorities) {
this.AUTHORITIES = authorities;
}
/\*\*
\* 修改图片的存储路径（默认的图片存储路径是SD卡上 Android/data/应用包名/时间戳.jpg）
\*
\* @param imgPath 图片的存储路径（包括文件名和后缀）
\*/
public void setImgPath(String imgPath) {
this.imgPath = imgPath;
}
/\*\*
\* 拍照获取
\*/
public void takePhoto() {
File imgFile = new File(imgPath);
if (!imgFile.getParentFile().exists()) {
imgFile.getParentFile().mkdirs();
}
Uri imgUri = null;
// if (Build.VERSION.SDK\_INT >= 24) {//这里用这种传统的方法无法调起相机
// imgUri = FileProvider.getUriForFile(mActivity, AUTHORITIES, imgFile);
// } else {
// imgUri = Uri.fromFile(imgFile);
// }
/\*
\* 1.现象
在项目中调用相机拍照和录像的时候，android4.x,Android5.x,Android6.x均没有问题,在Android7.x下面直接闪退
2.原因分析
Android升级到7.0后对权限又做了一个更新即不允许出现以file://的形式调用隐式APP，需要用共享文件的形式：content:// URI
3.解决方案
下面是打开系统相机的方法，做了android各个版本的兼容:
\* \*/
if (Build.VERSION.SDK\_INT < 24) {
// 从文件中创建uri
imgUri = Uri.fromFile(imgFile);
} else {
//兼容android7.0 使用共享文件的形式
ContentValues contentValues = new ContentValues(1);
contentValues.put(MediaStore.Images.Media.DATA, imgFile.getAbsolutePath());
imgUri = mActivity.getApplication().getContentResolver().insert(MediaStore.Images.Media.EXTERNAL\_CONTENT\_URI, contentValues);
}
Intent intent = new Intent(MediaStore.ACTION\_IMAGE\_CAPTURE);
intent.putExtra(MediaStore.EXTRA\_OUTPUT, imgUri);
mActivity.startActivityForResult(intent, REQ\_TAKE\_PHOTO);
}
/\*\*
\* 从图库获取
\*/
public void selectPhoto() {
Intent intent = new Intent(Intent.ACTION\_PICK, null);
intent.setDataAndType(MediaStore.Images.Media.EXTERNAL\_CONTENT\_URI, "image/\*");
mActivity.startActivityForResult(intent, REQ\_SELECT\_PHOTO); // Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
// intent.setType("image/*");
// mActivity.startActivityForResult(intent, REQ_SELECT_PHOTO);
}
private void zoomPhoto(File inputFile, File outputFile) {
File parentFile = outputFile.getParentFile();
if (!parentFile.exists()) {
parentFile.mkdirs();
}
Intent intent = new Intent("com.android.camera.action.CROP");
if (Build.VERSION.SDK\_INT >= Build.VERSION\_CODES.N) {
intent.setDataAndType(getImageContentUri(mActivity, inputFile), "image/\*");
} else {
intent.setDataAndType(Uri.fromFile(inputFile), "image/\*");
}
intent.putExtra("crop", "true");
//设置剪裁图片宽高比
intent.putExtra("mAspectX", mAspectX);
intent.putExtra("mAspectY", mAspectY);
//设置剪裁图片大小
intent.putExtra("mOutputX", mOutputX);
intent.putExtra("mOutputY", mOutputY);
// 是否返回uri
intent.putExtra("return-data", false);
intent.putExtra(MediaStore.EXTRA\_OUTPUT, Uri.fromFile(outputFile));
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
mActivity.startActivityForResult(intent, REQ\_ZOOM\_PHOTO);
}
public void attachToActivityForResult(int requestCode, int resultCode, Intent data) {
if (resultCode == AppCompatActivity.RESULT\_OK) {
switch (requestCode) {
case LQRPhotoSelectUtils.REQ\_TAKE\_PHOTO://拍照
mInputFile = new File(imgPath);
if (mShouldCrop) {//裁剪
mOutputFile = new File(generateImgePath());
mOutputUri = Uri.fromFile(mOutputFile);
zoomPhoto(mInputFile, mOutputFile);
} else {//不裁剪
mOutputUri = Uri.fromFile(mInputFile);
if (mListener != null) {
mListener.onFinish(mInputFile, mOutputUri);
}
}
break;
case LQRPhotoSelectUtils.REQ\_SELECT\_PHOTO://图库
if (data != null) {
Uri sourceUri = data.getData();
String\[\] proj = {MediaStore.Images.Media.DATA};
Cursor cursor = mActivity.managedQuery(sourceUri, proj, null, null, null);
int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
String imgPath = cursor.getString(columnIndex);
mInputFile = new File(imgPath);
if (mShouldCrop) {//裁剪
mOutputFile = new File(generateImgePath());
mOutputUri = Uri.fromFile(mOutputFile);
zoomPhoto(mInputFile, mOutputFile);
} else {//不裁剪
mOutputUri = Uri.fromFile(mInputFile);
if (mListener != null) {
mListener.onFinish(mInputFile, mOutputUri);
}
}
}
break;
case LQRPhotoSelectUtils.REQ\_ZOOM\_PHOTO://裁剪
if (data != null) {
if (mOutputUri != null) {
//删除拍照的临时照片
File tmpFile = new File(imgPath);
if (tmpFile.exists())
tmpFile.delete();
if (mListener != null) {
mListener.onFinish(mOutputFile, mOutputUri);
}
}
}
break;
}
}
}
/\*\*
\* 安卓7.0裁剪根据文件路径获取uri
\*/
private Uri getImageContentUri(Context context, File imageFile) {
String filePath = imageFile.getAbsolutePath();
Cursor cursor = context.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 context.getContentResolver().insert(
MediaStore.Images.Media.EXTERNAL\_CONTENT\_URI, values);
} else {
return null;
}
}
}
/\*\*
\* 产生图片的路径，带文件夹和文件名，文件名为当前毫秒数
\*/
private String generateImgePath() {
return getExternalStoragePath() + File.separator + String.valueOf(System.currentTimeMillis()) + ".jpg";
// return Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + String.valueOf(System.currentTimeMillis()) + ".jpg";//测试用
}
/\*\*
\* 获取SD下的应用目录
\*/
private String getExternalStoragePath() {
StringBuilder sb = new StringBuilder();
sb.append(Environment.getExternalStorageDirectory().getAbsolutePath());
sb.append(File.separator);
String ROOT\_DIR = "Android/data/" + mActivity.getPackageName();
sb.append(ROOT\_DIR);
sb.append(File.separator);
return sb.toString();
}
public interface PhotoSelectListener {
void onFinish(File outputFile, Uri outputUri);
} }
LQRPhotoSelectUtils
LQRPhotoSelectUtils
2.MainActivity
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import android.Manifest;
import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.bumptech.glide.Glide;
import com.example.camera.utils.LQRPhotoSelectUtils;
import com.example.camera.utils.ToastUtil;
import java.io.File;
import kr.co.namee.permissiongen.PermissionGen;
public class MainActivity extends AppCompatActivity {
//定义控件
private Button mBtnTakePhoto;
private Button mBtnSelectPic;
private Button mBtnFinish;
private ImageView mIvPic;
private TextView mTvPath;
private TextView mTvUri;
private static final int REQUEST\_CODE = 0x001;
private LQRPhotoSelectUtils mLqrPhotoSelectUtils;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity\_main);
//绑定控件
mBtnTakePhoto = findViewById(R.id.btn\_take\_photo);
mBtnSelectPic = findViewById(R.id.btn\_select\_pic);
mTvPath = findViewById(R.id.tvPath);
mTvUri = findViewById(R.id.tvUri);
mIvPic = findViewById(R.id.iv\_pic);
mBtnFinish = findViewById(R.id.btn\_finish);
init();
initListener();
}
private void init() {//初始化
//创建LQRPhotoSelectUtils（一个Activity对应一个LQRPhotoSelectUtils）
mLqrPhotoSelectUtils = new LQRPhotoSelectUtils(this, new LQRPhotoSelectUtils.PhotoSelectListener() {
@Override
public void onFinish(File outputFile, Uri outputUri) {
//当拍照或从图库选取图片成功后回调
mTvPath.setText(outputFile.getAbsolutePath());//显示图片路径
mTvUri.setText(outputUri.toString());//显示图片uri
//System.out.println(outputUri.toString());
Glide.with(MainActivity.this).load(outputUri).into(mIvPic);//使用Glide进行图片展示
}
}, true);//是否裁剪。true裁剪，false不裁剪
//检查权限
if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.READ\_EXTERNAL\_STORAGE)!= PackageManager.PERMISSION\_GRANTED||
ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE\_EXTERNAL\_STORAGE)!= PackageManager.PERMISSION\_GRANTED||
ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA)!= PackageManager.PERMISSION\_GRANTED){
ActivityCompat.requestPermissions(MainActivity.this, new String\[\]{Manifest.permission.READ\_EXTERNAL\_STORAGE, Manifest.permission.WRITE\_EXTERNAL\_STORAGE, Manifest.permission.CAMERA}, REQUEST\_CODE);
}else{
ToastUtil.showMsg(MainActivity.this, "已经获得了所有权限");
}
}
private void initListener(){//初始化监听器
mBtnTakePhoto.setOnClickListener(new View.OnClickListener(){
@Override
public void onClick(View v) {
//获取权限，调用拍照方法
PermissionGen.with(MainActivity.this)
.addRequestCode(LQRPhotoSelectUtils.REQ\_TAKE\_PHOTO)
.permissions(Manifest.permission.READ\_EXTERNAL\_STORAGE,
Manifest.permission.WRITE\_EXTERNAL\_STORAGE,
Manifest.permission.CAMERA
).request();
//拍照
mLqrPhotoSelectUtils.takePhoto();
}
});
mBtnSelectPic.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// 选择图片
mLqrPhotoSelectUtils.selectPhoto();
}
});
mBtnFinish.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mTvPath.getText().toString().equals("图片路径:")){
// 如果一张图片都没选
ToastUtil.showMsg(getApplicationContext(), "您还没有选择图片呢!");
}else{
ToastUtil.showMsg(getApplicationContext(), "选择图片成功:"+mTvPath.getText().toString());
Bundle bundle = new Bundle();
Intent intent = new Intent();
bundle.putString("uri", mTvUri.getText().toString());
intent.putExtras(bundle);
setResult(Activity.RESULT\_OK, intent);
finish();
}
}
});
}
public void onRequestPermissionsResult(int requestCode, @NonNull String\[\] permissions, @NonNull int\[\] grantResults) {
if (requestCode == REQUEST\_CODE) {
if (grantResults.length > 0 && grantResults\[0\] == PackageManager.PERMISSION\_GRANTED) {
initListener();
} else {
Toast.makeText(this, "您已拒绝授予权限", Toast.LENGTH\_LONG).show();
}
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
//在Activity中的onActivityResult()方法里与LQRPhotoSelectUtils关联
mLqrPhotoSelectUtils.attachToActivityForResult(requestCode, resultCode, data);
} }
3.xml界面
<Button
android:id="@+id/btn\_take\_photo"
android:text="拍照"
android:layout\_width="match\_parent"
android:layout\_height="wrap\_content"/>
<Button
android:id="@+id/btn\_select\_pic"
android:text="从图库中选取"
android:layout\_width="match\_parent"
android:layout\_height="wrap\_content"/>
<TextView
android:id="@+id/tvPath"
android:layout\_width="wrap\_content"
android:layout\_height="50dp"
android:text="图片路径:"/>
<TextView
android:id="@+id/tvUri"
android:layout\_width="wrap\_content"
android:layout\_height="50dp"
android:text="图片Uri:"/>
<ImageView
android:id="@+id/iv\_pic"
app:srcCompat="@drawable/head\_portrait"
android:layout\_width="300dp"
android:layout\_height="300dp"/>
<Button
android:id="@+id/btn\_finish"
android:layout\_width="match\_parent"
android:layout\_height="50dp"
android:text="完成"/> 
手机扫一扫
移动阅读更方便
你可能感兴趣的文章