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
我要评论
package com.zql.sdk;
import android.app.activity;
import android.content.context;
import android.content.intent;
import android.content.pm.packagemanager;
import android.net.uri;
import android.os.build;
import android.os.bundle;
import android.support.annotation.requiresapi;
import android.util.log;
import android.view.keyevent;
import android.view.view;
import android.view.window;
import android.webkit.javascriptinterface;
import android.webkit.valuecallback;
import android.webkit.webchromeclient;
import android.webkit.webview;
import android.webkit.webviewclient;
import android.widget.imageview;
import android.widget.textview;
import android.widget.toast;
import java.io.ioexception;
/**
* 浏览器组件
* created by zst on 2018/5/16.
*/
public class webviewactivity extends activity implements view.onclicklistener {
public static final string intent_url = "intent_url";//请求连接
public static final string intent_params_string = "intent_params_string";//请求参数字符串
public static final string intent_request_way = "intent_request_way";//请求方式（post/get）
private webview wvshow;
private textview tv_back_title;
private textview tv_title;
private imageview iv_back;
private textview tv_right;
public valuecallback<uri[]> uploadmessage;
private valuecallback<uri> muploadmessage;
@override
protected void oncreate(bundle savedinstancestate) {
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();
}
private void initdata() {
string intenturl = getintent().getstringextra(intent_url);
string intentparams = getintent().getstringextra(intent_params_string);
string intentrequestway = 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
} else if (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
//
// string htmldata = "<!doctype html>\n" +
// "<html>\n" +
// "<head>\n" +
// " <meta charset=\"utf-8\">\n" +
// " <meta name=\"viewport\" content=\"width=device-width, initial-scale=1,maximum-scale=1,user-scalable=no\">\n" +
// " <meta name=\"apple-mobile-web-app-capable\" content=\"yes\">\n" +
// " <meta name=\"apple-mobile-web-app-status-bar-style\" content=\"black\">\n" +
// " <title>修改资料</title>\n" +
// " <script src=\"./jquery-1.8.3.js\"></script>\n" +
// "</head>\n" +
// "\n" +
// "<body>\n" +
// " <div classname=\"image-uploader\">\n" +
// " <input id=\"imginput\" classname=\"imginput\" type=\"file\" accept=\"image/*\" />\n" +
// " <img id=\"imgshow\" classname=\"imgshow\" />\n" +
// " </div>\n" +
// "\n" +
// "<script> \n" +
// " $('#imginput').change(function () {\n" +
// " readurl(this);\n" +
// "});\n" +
// "\n" +
// "function readurl(input){\n" +
// " if (input.files && input.files[0]) {\n" +
// " const reader = new filereader();\n" +
// " reader.readasdataurl(input.files[0]);\n" +
// " reader.onload = (e) => {\n" +
// " $('#imgshow').attr('src', e.target.result);\n" +
// " };\n" +
// " };\n" +
// " };\n" +
// "</script>\n" +
// "</body>\n" +
// "</html>";
//
// log.e("网页", htmldata);
//
// wvshow.loaddatawithbaseurl(null, htmldata, "text/html", "utf-8", null);
}
private void initview() {
wvshow = (webview) findviewbyid(r.id.wv_body);
wvshow.getsettings().setjavascriptenabled(true);//允许与js 交互
wvshow.getsettings().setdefaulttextencodingname("utf-8");//支持中文
//在js中调用本地java方法
wvshow.addjavascriptinterface(new jsinterface(this), "androidyzh");
wvshow.getsettings().setdomstorageenabled(true);//允许缓存、开启dom（双重重定向白屏问题）
wvshow.setwebviewclient(new webviewclient() {
//覆盖shouldoverrideurlloading 方法
@override
public boolean shouldoverrideurlloading(webview view, string url) {
if (url == null) return false;
try {
if (url.startswith("http:") || url.startswith("https:")) {
view.loadurl(url);
return true;
} else {
intent intent = new intent(intent.action_view, uri.parse(url));
startactivity(intent);
return true;
}
} catch (exception e) { //防止crash (如果手机上没有安装处理某个scheme开头的url的app, 会导致crash)
return false;
}
}
});
wvshow.setwebchromeclient(new webchromeclient() {//监听网页加载
@override
public void onprogresschanged(webview view, int newprogress) {
// if (newprogress == 100) {
// // 网页加载完成
// pbprogress.setvisibility(view.gone);
// } else {
// // 加载中
// pbprogress.setprogress(newprogress);
// }
super.onprogresschanged(view, newprogress);
}
@override
public void onreceivedtitle(webview view, string title) {
super.onreceivedtitle(view, title);
tv_title.settext(title);
}
public void openfilechooser(valuecallback<uri> uploadmsg) {
log.e("点击", "1");
imgutil.choicephoto(webviewactivity.this);
}
public void openfilechooser(valuecallback<uri> uploadmsg, string accepttype) {
openfilechooser(uploadmsg);
log.e("点击", "3");
}
public void openfilechooser(valuecallback<uri> uploadmsg, string accepttype, string capture) {
openfilechooser(uploadmsg);
log.e("点击", "4");
}
@requiresapi(api = build.version_codes.lollipop)
public boolean onshowfilechooser(webview mwebview, valuecallback<uri[]> filepathcallback, webchromeclient.filechooserparams filechooserparams) {
if (uploadmessage != null) {
uploadmessage.onreceivevalue(null);
uploadmessage = null;
}
uploadmessage = filepathcallback;
log.e("点击", "2");
imgutil.choicephoto(webviewactivity.this);
return true;
}
});
}
@override
public void onclick(view v) {
int i = v.getid();
if (i == r.id.iv_back) {
if (wvshow.cangoback()) {
wvshow.goback();
} else {
finish();
}
} else if (i == r.id.tv_back_title) {
finish();
}
}
/**
* js调用原生方法
*/
private class jsinterface {
private context mcontext;
public jsinterface(context context) {
this.mcontext = context;
}
@javascriptinterface
public void closeh5(string name) {//关闭sdk
log.e("网页", "方法入参：" + name);
finish();
}
@javascriptinterface
public void downloadfile(string name) {//下载文件
log.e("网页", "方法入参：" + name);
//这里是把地址用默认浏览器打开，在浏览器中下载
uri uri = uri.parse(name);
intent intent = new intent();
intent.setaction("android.intent.action.view");
intent.setdata(uri);
startactivity(intent);
}
}
//重写activity的onkeydown事件，判断当用户按下“返回”按钮，webview返回上一页
@override
public boolean onkeydown(int keycode, keyevent event) {
if ((keycode == keyevent.keycode_back) && wvshow.cangoback()) {
wvshow.goback();
return true;
} else {
finish();
}
return super.onkeydown(keycode, event);
}
@requiresapi(api = build.version_codes.lollipop)
@override
protected void onactivityresult(int requestcode, int resultcode, intent intent) {
if (resultcode == result_ok) {//正确返回
switch (requestcode) {
case imgutil.take_photo://相机返回
log.e("返回相机", imgutil.imageuri.tostring());
//相机返回rui
//uri uritake = imgutil.imageuri;
uri uritake = null;
try {
uritake = imgutil.getcompressuri(webviewactivity.this, imgutil.imageuri);
} catch (ioexception e) {
e.printstacktrace();
}
//显示在页面
if (uploadmessage == null) return;
uri[] imgtaskuris = {uritake};
uploadmessage.onreceivevalue(imgtaskuris);
uploadmessage = null;
if (null == muploadmessage) return;
uri result = intent == null || resultcode != mainactivity.result_ok ? null : uritake;
muploadmessage.onreceivevalue(result);
muploadmessage = null;
break;
case imgutil.choose_photo://相册返回
try {
if (intent != null) {
//相册返回
log.e("返回", "intent2:" + intent.getdata().tostring() + "..." + uploadmessage);
//相册返回uri
//uri urichoose = intent.getdata();
uri urichoose = imgutil.getcompressuri(webviewactivity.this, intent.getdata());
//显示在页面
if (uploadmessage == null) return;
uri[] imgchooseuris = {urichoose};
uploadmessage.onreceivevalue(imgchooseuris);
//uploadmessage.onreceivevalue(webchromeclient.filechooserparams.parseresult(resultcode, intent));
uploadmessage = null;
log.e("返回", "intent3:" + webchromeclient.filechooserparams.parseresult(resultcode, intent).tostring());
}
break;
} catch (exception e) {
e.printstacktrace();
uiutil.showtoast(this, "图片选择失败");
}
break;
}
} else {
uiutil.showtoast(this, "图片选择失败");
}
}
@override
public void onrequestpermissionsresult(int requestcode, string[] permissions, int[] grantresults) {
switch (requestcode) {
case imgutil.request_code_album://相册存储权限
if (grantresults.length > 0 && grantresults[0] == packagemanager.permission_granted) {
imgutil.openalbum(this);
} else {
uiutil.showtoast(this, "选择图库需要同意权限");
}
break;
case imgutil.request_code_camera://相机拍照权限
if (grantresults[0] == packagemanager.permission_granted) {//允许
imgutil.opencamera(webviewactivity.this);
} else {//拒绝
uiutil.showtoast(this, "只有同意相机权限,才能使用扫码功能");
}
break;
default:
}
}
}
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
package com.zql.sdk;
import android.manifest;
import android.app.activity;
import android.app.activitymanager;
import android.app.alertdialog;
import android.content.contentresolver;
import android.content.context;
import android.content.dialoginterface;
import android.content.intent;
import android.content.pm.packagemanager;
import android.database.cursor;
import android.graphics.bitmap;
import android.graphics.bitmapfactory;
import android.net.uri;
import android.os.build;
import android.provider.mediastore;
import android.support.annotation.requiresapi;
import android.support.v4.app.activitycompat;
import android.support.v4.content.contextcompat;
import android.support.v4.content.fileprovider;
import android.util.log;
import android.widget.toast;
import java.io.bytearrayinputstream;
import java.io.bytearrayoutputstream;
import java.io.file;
import java.io.filenotfoundexception;
import java.io.ioexception;
import java.io.inputstream;
import java.util.arraylist;
import java.util.list;
/**
* 图片工具类
* created by xiaoshuai on 2018/8/17.
*/
public class imgutil {
public static final int take_photo = 1;//拍照
public static final int choose_photo = 2;//选择相册
public static final int request_code_camera = 3;//相机权限请求
public static final int request_code_album = 4;//相册权限请求
public static uri imageuri;//相机拍照图片保存地址
/**
* 选择图片，从图库、相机
*
* @param activity 上下文
*/
public static void choicephoto(final activity activity) {
//采用的是系统dialog作为选择弹框
new alertdialog.builder(activity).settitle("上传头像")//设置对话框标题
.setpositivebutton("拍照", new dialoginterface.onclicklistener() {//添加确定按钮
@requiresapi(api = build.version_codes.m)
@override
public void onclick(dialoginterface dialog, int which) {
arraylist<string> permissions = new arraylist<>();
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(new string[permissions.size()]), request_code_camera);
}
// if (build.version.sdk_int >= 23) {//检查相机权限
// arraylist<string> permissions = new arraylist<>();
// 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(new string[permissions.size()]), request_code_camera);
// }
// } else {
// //打开相机-兼容7.0
// opencamera(activity);
// }
}
}).
setnegativebutton("系统相册", new dialoginterface.onclicklistener() {
@override
public void onclick(dialoginterface dialog, int which) {
//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, new string[]{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
*
* @param activity
*/
public static void opencamera(activity activity) {
// 创建file对象，用于存储拍照后的图片
file outputimage = new file(activity.getexternalcachedir(), "output_image.jpg");
try {
if (outputimage.exists()) {
outputimage.delete();
}
outputimage.createnewfile();
} catch (ioexception e) {
e.printstacktrace();
}
if (build.version.sdk_int < 24) {
imageuri = uri.fromfile(outputimage);
} else {
//android 7.0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
intent intent = new intent("android.media.action.image_capture");
intent.putextra(mediastore.extra_output, imageuri);
activity.startactivityforresult(intent, take_photo);
}
/**
* 打开图库
* @param activity
*/
public static void openalbum(activity activity) {
//调用系统图库的意图
intent choosepicintent = new intent(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
//intent intent = new intent("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
* @param context
* @param uri
* @return
*/
public static string getfilepath( final context context, final uri uri ) {
if ( null == uri ) return null;
final string scheme = uri.getscheme();
string data = null;
if ( scheme == null )
data = uri.getpath();
else if ( contentresolver.scheme_file.equals( scheme ) ) {
data = uri.getpath();
} else if ( contentresolver.scheme_content.equals( scheme ) ) {
cursor cursor = context.getcontentresolver().query( uri, new string[] { mediastore.images.imagecolumns.data }, null, null, null );
if ( null != cursor ) {
if ( cursor.movetofirst() ) {
int index = cursor.getcolumnindex( mediastore.images.imagecolumns.data );
if ( index > -1 ) {
data = cursor.getstring( index );
}
}
cursor.close();
}
}
return data;
}
/**
* 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
*
* @param activity 上下文
* @param uri 传入图片的uri
* @return byte[]
*/
public static byte[] getimgbytefromuri(activity activity, uri uri) throws ioexception {
//先进行尺寸压缩
bitmap bitmap = getbitmapformuri(activity, uri);
//再进行质量压缩
bytearrayoutputstream out = new bytearrayoutputstream();
bitmap.compress(bitmap.compressformat.png, 100, out);//100表示不压缩，直接放到out里面
int options = 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
return bs;
}
public static uri getcompressuri(activity activity, uri uri) throws ioexception {
//先进行尺寸压缩
bitmap bitmap = getbitmapformuri(activity, uri);
uri uricompress = uri.parse(mediastore.images.media.insertimage(activity.getcontentresolver(), bitmap, null,null));
// //再进行质量压缩
// bytearrayoutputstream out = new bytearrayoutputstream();
// bitmap.compress(bitmap.compressformat.png, 100, out);//100表示不压缩，直接放到out里面
// int options = 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
return uricompress;
}
/**
* 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
*
* @param uri
*/
public static bitmap getbitmapformuri(activity ac, uri uri) throws filenotfoundexception, ioexception {
inputstream input = ac.getcontentresolver().openinputstream(uri);
bitmapfactory.options onlyboundsoptions = new bitmapfactory.options();
onlyboundsoptions.injustdecodebounds = true;
onlyboundsoptions.indither = true;//optional
onlyboundsoptions.inpreferredconfig = bitmap.config.argb_8888;//optional
bitmapfactory.decodestream(input, null, onlyboundsoptions);
input.close();
int originalwidth = onlyboundsoptions.outwidth;
int originalheight = onlyboundsoptions.outheight;
if ((originalwidth == -1) || (originalheight == -1))
return null;
//图片分辨率以750x450为标准
float hh = 800f;//这里设置高度为750f
float ww = 800f;//这里设置宽度为450f
float sq = 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);
int be = 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);
} else if (originalwidth < originalheight && originalheight > hh) {//如果高度高，根据宽度固定大小缩放
be = (int) (originalheight / hh);
} else if (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.options bitmapoptions = new bitmapfactory.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);
bitmap bitmap = bitmapfactory.decodestream(input, null, bitmapoptions);
input.close();
return bitmap;//再进行质量压缩
}
}
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