web view 사용방법

manifest에 internet권한 꼭주기.

안그럼화면안뜸~~

package com.example.ccc;
import android.annotation.TargetApi;
import android.os.Build;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.webkit.WebResourceRequest;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends AppCompatActivity {
    EditText et_url;
    Button btn_go;
    WebView webView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        et_url=findViewById(R.id.et_url);
        btn_go=findViewById(R.id.btn_go);
        webView=findViewById(R.id.webview);
        webView.setWebViewClient(new MyBrowser());
        WebSettings set=webView.getSettings();
        set.setJavaScriptEnabled(true);
        set.setBuiltInZoomControls(true);
        //버튼이벤트 부여
        btn_go.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // et_url의 url로 webview를이동시켜라
                String url=et_url.getText().toString();
                webView.loadUrl(url);
            }
        });
    }
    private class MyBrowser extends WebViewClient{
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            return true;
        }
    }
    @TargetApi(Build.VERSION_CODES.N)
    private class MyBrowser2 extends WebViewClient{
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
            String url=request.getUrl().toString();
            return super.shouldOverrideUrlLoading(view, request);
        }
    }
}

xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <RelativeLayout
        android:id="@+id/top_layout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <EditText
            android:id="@+id/et_url"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_toLeftOf="@id/btn_go"
            android:text="http://www.google.co.kr" />
        <Button
            android:id="@+id/btn_go"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:text="GO" />
    </RelativeLayout>
    <RelativeLayout
        android:id="@+id/middle_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/top_layout">
        <WebView
            android:id="@+id/webview"
            android:layout_width="match_parent"
            android:layout_height="match_parent">
        </WebView>
    </RelativeLayout>
    <RelativeLayout
        android:id="@+id/bottom_layout"
        android:gravity="center"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true">
        <Button
            android:id="@+id/btn_back"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="back" />
        <Button
            android:id="@+id/btn_forward"
            android:layout_toRightOf="@id/btn_back"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="forward" />
    </RelativeLayout>
</RelativeLayout>