Android网页H5 Input选择相机和系统相册
需求：
网页h5的input选择相机和系统相册，并且返回压缩的图片到h5。
代码：
1、WebView代码
packagecom.zql.sdk;
importandroid.app.Activity;
importandroid.content.Context;
importandroid.content.Intent;
importandroid.content.pm.PackageManager;
importandroid.net.Uri;
importandroid.os.Build;
importandroid.os.Bundle;
importandroid.support.annotation.RequiresApi;
importandroid.util.Log;
importandroid.view.KeyEvent;
importandroid.view.View;
importandroid.view.Window;
importandroid.webkit.JavascriptInterface;
importandroid.webkit.ValueCallback;
importandroid.webkit.WebChromeClient;
importandroid.webkit.WebView;
importandroid.webkit.WebViewClient;
importandroid.widget.ImageView;
importandroid.widget.TextView;
importandroid.widget.Toast;
importjava.io.IOException;
/**
*浏览器组件
*Createdbyzston2018/5/16.
*/
publicclassWebViewActivityextendsActivityimplementsView.OnClickListener{
publicstaticfinalStringINTENT_URL="intent_url";//请求连接
publicstaticfinalStringINTENT_PARAMS_STRING="intent_params_string";//请求参数字符串
publicstaticfinalStringINTENT_REQUEST_WAY="intent_request_way";//请求方式（POST/GET）
privateWebViewwvShow;
privateTextViewtv_back_title;
privateTextViewtv_title;
privateImageViewiv_back;
privateTextViewtv_right;
publicValueCallbackuploadMessage;
privateValueCallbackmUploadMessage;
@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);//去掉标题栏
setContentView(R.layout.activity_web_view);
tv_back_title=(TextView)findViewById(R.id.tv_back_title);
tv_title=(TextView)findViewById(R.id.tv_title);
iv_back=(ImageView)findViewById(R.id.iv_back);
tv_right=(TextView)findViewById(R.id.tv_right);
iv_back.setOnClickListener(this);
tv_back_title.setOnClickListener(this);
tv_right.setOnClickListener(this);
initView();
initData();
}
privatevoidinitData(){
StringintentUrl=getIntent().getStringExtra(INTENT_URL);
StringintentParams=getIntent().getStringExtra(INTENT_PARAMS_STRING);
StringintentRequestWay=getIntent().getStringExtra(INTENT_REQUEST_WAY);
Log.e("WebView请求","连接："+intentUrl+"....."+"参数："+intentParams);
if(intentRequestWay.equals("GET")){
wvShow.loadUrl(intentUrl+"?"+intentParams);//get请求
}elseif(intentRequestWay.equals("POST")){
wvShow.postUrl(intentUrl,intentParams.getBytes());//post请求
}else{
Toast.makeText(WebViewActivity.this,"请求方式参数错误",Toast.LENGTH_SHORT).show();
}
////wvShow.loadUrl("http://qas-gw.baofoo.com/merchant_page?CODE=6d8950fc495c2a63106ce45d2647e21aec04001b53b3d7aac2f8af3b3d24f84a6c51c92843814b270eb28ead11820178fad5a20a7278f042");//get请求
//
//StringhtmlData="\n"+
//"\n"+
//"\n"+
//"\n"+
//"\n"+
//"\n"+
//"\n"+
//"修改资料 \n"+
//"\n"+
//"\n"+
//"\n"+
//"\n"+
//"\n"+
//" 2、ImgUtil.java工具类
1）、选择相机方法（选择相机的方法还有额外的代码，具体点击这里）
2）、选择相册方法
3）、压缩图片方法
packagecom.zql.sdk;
importandroid.Manifest;
importandroid.app.Activity;
importandroid.app.ActivityManager;
importandroid.app.AlertDialog;
importandroid.content.ContentResolver;
importandroid.content.Context;
importandroid.content.DialogInterface;
importandroid.content.Intent;
importandroid.content.pm.PackageManager;
importandroid.database.Cursor;
importandroid.graphics.Bitmap;
importandroid.graphics.BitmapFactory;
importandroid.net.Uri;
importandroid.os.Build;
importandroid.provider.MediaStore;
importandroid.support.annotation.RequiresApi;
importandroid.support.v4.app.ActivityCompat;
importandroid.support.v4.content.ContextCompat;
importandroid.support.v4.content.FileProvider;
importandroid.util.Log;
importandroid.widget.Toast;
importjava.io.ByteArrayInputStream;
importjava.io.ByteArrayOutputStream;
importjava.io.File;
importjava.io.FileNotFoundException;
importjava.io.IOException;
importjava.io.InputStream;
importjava.util.ArrayList;
importjava.util.List;
/**
*图片工具类
*Createdbyxiaoshuaion2018/8/17.
*/
publicclassImgUtil{
publicstaticfinalintTAKE_PHOTO=1;//拍照
publicstaticfinalintCHOOSE_PHOTO=2;//选择相册
publicstaticfinalintREQUEST_CODE_CAMERA=3;//相机权限请求
publicstaticfinalintREQUEST_CODE_ALBUM=4;//相册权限请求
publicstaticUriimageUri;//相机拍照图片保存地址
/**
*选择图片，从图库、相机
*
*@paramactivity上下文
*/
publicstaticvoidchoicePhoto(finalActivityactivity){
//采用的是系统Dialog作为选择弹框
newAlertDialog.Builder(activity).setTitle("上传头像")//设置对话框标题
.setPositiveButton("拍照",newDialogInterface.OnClickListener(){//添加确定按钮
@RequiresApi(api=Build.VERSION_CODES.M)
@Override
publicvoidonClick(DialogInterfacedialog,intwhich){
ArrayListpermissions=newArrayList<>();
if(activity.checkSelfPermission(Manifest.permission.CAMERA)!=PackageManager.PERMISSION_GRANTED){
permissions.add(Manifest.permission.CAMERA);
}
if(permissions.size()==0){//有权限,跳转
//打开相机-兼容7.0
ImgUtil.openCamera(activity);
}else{
activity.requestPermissions(permissions.toArray(newString[permissions.size()]),REQUEST_CODE_CAMERA);
}
//if(Build.VERSION.SDK_INT>=23){//检查相机权限
//ArrayListpermissions=newArrayList<>();
//if(activity.checkSelfPermission(Manifest.permission.CAMERA)!=PackageManager.PERMISSION_GRANTED){
//permissions.add(Manifest.permission.CAMERA);
//}
//
//if(permissions.size()==0){//有权限,跳转
////打开相机-兼容7.0
//openCamera(activity);
//}else{
//activity.requestPermissions(permissions.toArray(newString[permissions.size()]),REQUEST_CODE_CAMERA);
//}
//}else{
////打开相机-兼容7.0
//openCamera(activity);
//}
}
}).
setNegativeButton("系统相册",newDialogInterface.OnClickListener(){
@Override
publicvoidonClick(DialogInterfacedialog,intwhich){
//如果有权限申请，请在Activity中onRequestPermissionsResult权限返回里面重新调用openAlbum()
if(ContextCompat.checkSelfPermission(activity,Manifest.permission.WRITE_EXTERNAL_STORAGE)!=PackageManager.PERMISSION_GRANTED){
ActivityCompat.requestPermissions(activity,newString[]{Manifest.permission.WRITE_EXTERNAL_STORAGE},REQUEST_CODE_ALBUM);
}else{
openAlbum(activity);
}
}
}).show();//在按键响应事件中显示此对话框
}
/**
*打开相机
*兼容7.0
*
*@paramactivity
*/
publicstaticvoidopenCamera(Activityactivity){
//创建File对象，用于存储拍照后的图片
FileoutputImage=newFile(activity.getExternalCacheDir(),"output_image.jpg");
try{
if(outputImage.exists()){
outputImage.delete();
}
outputImage.createNewFile();
}catch(IOExceptione){
e.printStackTrace();
}
if(Build.VERSION.SDK_INT<24){
imageUri=Uri.fromFile(outputImage);
}else{
//Android7.0系统开始使用本地真实的Uri路径不安全,使用FileProvider封装共享Uri
//参数二:fileprovider绝对路径com.dyb.testcamerademo：项目包名
imageUri=FileProvider.getUriForFile(activity,"com.zql.sdk.fileprovider",outputImage);
}
//启动相机程序
Intentintent=newIntent("android.media.action.IMAGE_CAPTURE");
intent.putExtra(MediaStore.EXTRA_OUTPUT,imageUri);
activity.startActivityForResult(intent,TAKE_PHOTO);
}
/**
*打开图库
*@paramactivity
*/
publicstaticvoidopenAlbum(Activityactivity){
//调用系统图库的意图
IntentchoosePicIntent=newIntent(Intent.ACTION_PICK,null);
choosePicIntent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,"image/*");
activity.startActivityForResult(choosePicIntent,CHOOSE_PHOTO);
//打开系统默认的软件
//Intentintent=newIntent("android.intent.action.GET_CONTENT");
//intent.setType("image/*");
//activity.startActivityForResult(intent,CHOOSE_PHOTO);//打开相册
}
/**
*通过uri获取路径filepath
*@paramcontext
*@paramuri
*@return
*/
publicstaticStringgetFilePath(finalContextcontext,finalUriuri){
if(null==uri)returnnull;
finalStringscheme=uri.getScheme();
Stringdata=null;
if(scheme==null)
data=uri.getPath();
elseif(ContentResolver.SCHEME_FILE.equals(scheme)){
data=uri.getPath();
}elseif(ContentResolver.SCHEME_CONTENT.equals(scheme)){
Cursorcursor=context.getContentResolver().query(uri,newString[]{MediaStore.Images.ImageColumns.DATA},null,null,null);
if(null!=cursor){
if(cursor.moveToFirst()){
intindex=cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
if(index>-1){
data=cursor.getString(index);
}
}
cursor.close();
}
}
returndata;
}
/**
*得到byte[]
*LeanCloud上传文件是需要byte[]数组的
*这里对传入的图片Uri压缩，并转换为byte[]后返回
*
*@paramactivity上下文
*@paramuri传入图片的Uri
*@returnbyte[]
*/
publicstaticbyte[]getImgByteFromUri(Activityactivity,Uriuri)throwsIOException{
//先进行尺寸压缩
Bitmapbitmap=getBitmapFormUri(activity,uri);
//再进行质量压缩
ByteArrayOutputStreamout=newByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG,100,out);//100表示不压缩，直接放到out里面
intoptions=90;//压缩比例
while(out.toByteArray().length/1024>200){//循环判断如果压缩后图片是否大于100kb,大于继续压缩
out.reset();//重置baos即清空baos
bitmap.compress(Bitmap.CompressFormat.JPEG,options,out);//这里压缩options%，把压缩后的数据存放到baos中
options-=10;//每次都减少10
}
Log.e("压缩-提交",out.toByteArray().length+"");
byte[]bs=out.toByteArray();//转换为byte提交
returnbs;
}
publicstaticUrigetCompressUri(Activityactivity,Uriuri)throwsIOException{
//先进行尺寸压缩
Bitmapbitmap=getBitmapFormUri(activity,uri);
UriuriCompress=Uri.parse(MediaStore.Images.Media.insertImage(activity.getContentResolver(),bitmap,null,null));
////再进行质量压缩
//ByteArrayOutputStreamout=newByteArrayOutputStream();
//bitmap.compress(Bitmap.CompressFormat.PNG,100,out);//100表示不压缩，直接放到out里面
//intoptions=90;//压缩比例
//while(out.toByteArray().length/1024>200){//循环判断如果压缩后图片是否大于100kb,大于继续压缩
//out.reset();//重置baos即清空baos
//bitmap.compress(Bitmap.CompressFormat.JPEG,options,out);//这里压缩options%，把压缩后的数据存放到baos中
//options-=10;//每次都减少10
//}
//Log.e("压缩-提交",out.toByteArray().length+"");
//
//byte[]bs=out.toByteArray();//转换为byte提交
returnuriCompress;
}
/**
*图片尺寸压缩
*
*宽度高度不一样：依靠规定的高或宽其一最大值来做界限
*高度宽度一样：依照规定的宽度压缩
*
*@paramuri
*/
publicstaticBitmapgetBitmapFormUri(Activityac,Uriuri)throwsFileNotFoundException,IOException{
InputStreaminput=ac.getContentResolver().openInputStream(uri);
BitmapFactory.OptionsonlyBoundsOptions=newBitmapFactory.Options();
onlyBoundsOptions.inJustDecodeBounds=true;
onlyBoundsOptions.inDither=true;//optional
onlyBoundsOptions.inPreferredConfig=Bitmap.Config.ARGB_8888;//optional
BitmapFactory.decodeStream(input,null,onlyBoundsOptions);
input.close();
intoriginalWidth=onlyBoundsOptions.outWidth;
intoriginalHeight=onlyBoundsOptions.outHeight;
if((originalWidth==-1)||(originalHeight==-1))
returnnull;
//图片分辨率以750x450为标准
floathh=800f;//这里设置高度为750f
floatww=800f;//这里设置宽度为450f
floatsq=800f;//这里设置正方形为300f
//缩放比。由于是固定比例缩放，只用高或者宽其中一个数据进行计算即可
Log.e("缩放",originalWidth+"..."+originalHeight);
intbe=1;//be=1表示不缩放
if(originalWidth>originalHeight&&originalWidth>ww){//如果宽度大，根据宽度固定大小缩放
be=(int)(originalWidth/ww);
}elseif(originalWidthhh){//如果高度高，根据宽度固定大小缩放
be=(int)(originalHeight/hh);
}elseif(originalWidth==originalHeight&&originalWidth>sq){//如果高度和宽度一样，根据任意一边大小缩放
//be=(int)(originalHeight/sq);
be=(int)(originalWidth/sq);
}
if(be<=0){//如果缩放比比1小，那么保持原图不缩放
be=1;
}
Log.e("缩放",be+"");
//比例压缩
BitmapFactory.OptionsbitmapOptions=newBitmapFactory.Options();
bitmapOptions.inSampleSize=be;//设置缩放比例
bitmapOptions.inDither=true;//optional
bitmapOptions.inPreferredConfig=Bitmap.Config.ARGB_8888;//optional
input=ac.getContentResolver().openInputStream(uri);
Bitmapbitmap=BitmapFactory.decodeStream(input,null,bitmapOptions);
input.close();
returnbitmap;//再进行质量压缩
}
}
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