indeterminateTint="#e4472a"属性即可ProgressBar的颜色
什么是WebView?
WebView是一个使用WebKit引擎的浏览器组件。
在Android 4.3系统及其以下，内部采用Webkit渲染引擎，在Android 4.4开始，采用chromium 渲染引擎来渲染View的内容。
Google对浏览器引擎进行了封装，提供了丰富的Java接口，其中最重要的便是android.webkit.WebView控件
效果图
image.png
//设置支持缩放 此功能用手机测试
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setSupportZoom(true);
//设置支持使用悬浮工具进行缩放
webView.getSettings().setUseWideViewPort(true);
主代码
package com.example.wed_text;
import android.app.Dialog;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.webkit.JsResult;
import android.webkit.WebChromeClient;
import android.webkit.WebResourceRequest;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.SeekBar;
import android.widget.TextView;
import android.widget.Toast;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private WebView webview;
private Button button6;
private Button button5;
private Button button4;
private Button button2;
private Button button7;
private LinearLayout mLi;
private ImageView iconview;
private TextView name;
private SeekBar seek;
private View mInflate;
private EditText mViewById;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mLi = (LinearLayout) findViewById(R.id.tiao);
iconview = (ImageView) findViewById(R.id.icon);
name = (TextView) findViewById(R.id.name);
seek = (SeekBar) findViewById(R.id.seek);
webview = (WebView) findViewById(R.id.webview);
button6 = (Button) findViewById(R.id.button6);
button6.setOnClickListener(this);
button5 = (Button) findViewById(R.id.button5);
button5.setOnClickListener(this);
button4 = (Button) findViewById(R.id.button4);
button4.setOnClickListener(this);
button2 = (Button) findViewById(R.id.button2);
button2.setOnClickListener(this);
button7 = (Button) findViewById(R.id.button7);
button7.setOnClickListener(this);
webview.loadUrl("http://www.baidu.com");//来一个默认搜索
webview.setWebViewClient(new WebViewClient() {//设置监听就会在此软件中打开
//
//// @Override//处理链接 不写的话所有链接都会默认调用其他软件打开
//// public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
//// webview.loadUrl(request.getUrl().toString());
//// return true;
//// }
//
@Override//监听网页开始加载
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
mLi.setVisibility(View.VISIBLE);
seek.setMax(100);//设置最大值
seek.setProgress(0);//设置进度
}
@Override//监听网页加载结束
public void onPageFinished(WebView view, String url) {
//设置布局隐藏
mLi.setVisibility(View.GONE);
}
});
webview.setWebChromeClient(new WebChromeClient() {
@Override//进度更改时
public void onProgressChanged(WebView view, int newProgress) {
super.onProgressChanged(view, newProgress);
seek.setProgress(newProgress); //进度
}
@Override//获得网址标题
public void onReceivedTitle(WebView view, String title) {
super.onReceivedTitle(view, title);
name.setText(title);
}
@Override//获得网址图片
public void onReceivedIcon(WebView view, Bitmap icon) {
super.onReceivedIcon(view, icon);
iconview.setImageBitmap(icon);
}
@Override//获得js语句
public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
return super.onJsAlert(view, url, message, result);
}
});
}
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.button6://搜索
mInflate = View.inflate(this, R.layout.baidu, null);
mViewById = mInflate.findViewById(R.id.baiduoo);
AlertDialog.Builder Builder = new AlertDialog.Builder(MainActivity.this);
Builder.setTitle("请输入网址");
Builder.setIcon(R.mipmap.ic_launcher_round);
Builder.setView(mInflate);
Builder.setPositiveButton("确定", new Dialog.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
String url = mViewById.getText().toString().trim();
//判断输入的内容
if (url != null && !url.equals("")) {
boolean infotext = infotext(url);
if (infotext) {//数字和汉字
try {//我将访问手机版百度
webview.loadUrl("https://m.baidu.com/s?ie=utf-8&f=8&rsv_bp=0&rsv_idx=1&tn=baidu&wd=" + URLEncoder.encode(url, "UTF-8") + "&rsv_pq=c1ab49ed000e568c&rsv_t=1109WqA4JkOggU9OU2gUeQBiEdojDm594tg1Naj7dhcFRYypDA%2B5Npl5a6Q&rqlang=cn&rsv_enter=1&rsv_sug3=6&rsv_sug1=4&rsv_sug7=101&rsv_sug2=0&inputT=2271&rsv_sug4=3027");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
} else {
//是字母然后判断字母拼接
if (url.indexOf("http://") == 0 && url.indexOf(".com") == 0) {
//indexOf==0代表我输入的能容有这个字符串
webview.loadUrl(url);
} else {
//判断是否有.com这个字符串
if(url.endsWith(".com")){
webview.loadUrl("http://" + url);
}else{
webview.loadUrl("http://" + url + ".com");
}
}
}
}
}
});
Builder.setNegativeButton("取消", null);
Builder.show();
break;
case R.id.button5://前进
if (webview.canGoForward()) {//是否可以前进
webview.goForward();
} else {
Toast.makeText(this, "已经是最前面的页面了", Toast.LENGTH_SHORT).show();
}
break;
case R.id.button4://后退
if (webview.canGoBack()) {//是否可以后退
webview.goBack();
} else {
Toast.makeText(this, "已经是最后一个页面了", Toast.LENGTH_SHORT).show();
}
break;
case R.id.button2://停止
webview.stopLoading();
break;
case R.id.button7://刷新
webview.reload();
break;
}
}
private boolean infotext(String txt) {
Pattern p = Pattern.compile("[0-9]*");//
Matcher m = p.matcher(txt);//matcher匹配器
if (m.matches()) {//matches相匹配的
return true;
}
p = Pattern.compile("[a-zA-Z]");//正则表达式
m = p.matcher(txt);
if (m.matches()) {
return false;
}
char[] c = txt.toCharArray();//把传过来的String转换成char字符数组
for (int i = 0;i < c.length;i ++)//通过循环来判断获取的char的每一个元素
{
p = Pattern.compile("[\u4e00-\u9fa5]");
m = p.matcher(c[i]+"");//每一个元素判断是否是汉字
if (m.matches()) {
return true;//是true
}
}
return false;
}
//加上返回监听对话框
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {//当手机按键按下时
if (keyCode == KeyEvent.KEYCODE_BACK) {//判断是返回键
exit();
return false;
}
return super.onKeyDown(keyCode, event);
}
private long exitTime=0;//用来保存上一次的时间
private void exit(){
if((System.currentTimeMillis()-exitTime)>2000) {//判断上次按的秒速
Toast.makeText(getApplicationContext(),
"再按一次退出程序", Toast.LENGTH_SHORT).show();
Log.e("tag","System.currentTimeMillis()"+System.currentTimeMillis());
exitTime = System.currentTimeMillis();
}else{
finish();//关闭页面
System.exit(0);
}
}
}
主布局
AlertDialog对话框布局