自己写的安卓简易浏览器

来源：互联网发布：mac os 双系统编辑：程序博客网时间：2024/04/29 21:50

自己写的安卓简易浏览器

程序：http://pan.baidu.com/share/link?shareid=2944813691&uk=2651469454

源代码：http://pan.baidu.com/share/link?shareid=2926499688&uk=2651469454

MainActivity.java

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package com.example.webbrowsertest;
 
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.app.Activity;
import android.view.ContextMenu;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.Window;
import android.webkit.JsPromptResult;
import android.webkit.JsResult;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
 
public class MainActivity extends Activity {
    private Button go_button, exit_button, top_button, bottom_button, baidu_button, pre_button, next_button;
    private EditText url_EditText;
    private TextView des_TextView;
    private WebView browser_webView;
    private float x, y;
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.activity_main);
        go_button = (Button) findViewById(R.id.go_button);
        exit_button = (Button) findViewById(R.id.exit_button);
        top_button = (Button) findViewById(R.id.top_button);
        bottom_button = (Button) findViewById(R.id.bottom_button);
        baidu_button = (Button) findViewById(R.id.baidu_button);
        pre_button = (Button) findViewById(R.id.pre_button);
        next_button = (Button) findViewById(R.id.next_button);
        url_EditText = (EditText) findViewById(R.id.url_EditText);
        des_TextView=(TextView)findViewById(R.id.des_TextView);
        browser_webView = (WebView) findViewById(R.id.browser_webView);
 
        url_EditText.setSingleLine();
 
        WebSettings webSettings = browser_webView.getSettings();
 
        webSettings.setJavaScriptEnabled(true);//设置支持javascript
 
        webSettings.setAllowFileAccess(true);//设置支持文件访问
 
        webSettings.setBuiltInZoomControls(true);//设置支持缩放
 
        webSettings.setDisplayZoomControls(false);//设置隐藏缩放按钮
 
        webSettings.setRenderPriority(WebSettings.RenderPriority.HIGH);//设置优先级
 
        webSettings.setUseWideViewPort(true);//设置缩放自适应屏幕1
 
        webSettings.setLoadWithOverviewMode(true);//设置缩放自适应屏幕2
 
        browser_webView.setWebChromeClient(new MyWebChromeClient());
 
        go_button.setOnClickListener(new go_buttonOnClickListener());
 
        exit_button.setOnClickListener(new exit_buttonOnClickListener());
 
        top_button.setOnClickListener(new top_buttonOnClickListener());
 
        bottom_button.setOnClickListener(new bottom_buttonOnClickListener());
 
        baidu_button.setOnClickListener(new baidu_buttonOnClickListener());
 
        pre_button.setOnClickListener(new pre_buttonOnClickListener());
 
        next_button.setOnClickListener(new next_buttonOnClickListener());
 
        browser_webView.setOnTouchListener(new browser_webViewOnTouchListener());
 
        browser_webView.loadUrl("http://www.baidu.com");
 
        browser_webView.setWebViewClient(new WebViewClient() {
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                view.loadUrl(url);
                url_EditText.setText(url);
                return true;
            }
        });
 
    }
 
    class go_buttonOnClickListener implements View.OnClickListener {
 
        @Override
        public void onClick(View view) {
            String url = url_EditText.getText().toString();
            if (url.contains("http://")) {
                browser_webView.loadUrl(url);
            }else if(url.contains("https://")){
                browser_webView.loadUrl(url);
            }else if(url.contains("")){
                browser_webView.loadUrl(url);
            }else if(url.contains("")){
                browser_webView.loadUrl(url);
            } else {
                browser_webView.loadUrl("http://" + url);
            }
            exit_button.setVisibility(View.INVISIBLE);
        }
    }
 
    class exit_buttonOnClickListener implements View.OnClickListener {
 
        @Override
        public void onClick(View view) {
            finish();
        }
    }
 
    class top_buttonOnClickListener implements View.OnClickListener {
 
        @Override
        public void onClick(View view) {
            browser_webView.setScrollY(0);
        }
    }
 
 
    class bottom_buttonOnClickListener implements View.OnClickListener {
 
        @Override
        public void onClick(View view) {
            browser_webView.setScrollY((int) (browser_webView.getContentHeight() * browser_webView.getScale() - (browser_webView.getHeight() + browser_webView.getScrollY())));
        }
    }
 
    class browser_webViewOnTouchListener implements View.OnTouchListener {
 
        @Override
        public boolean onTouch(View view, MotionEvent event) {
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
                if (exit_button.getVisibility() == View.VISIBLE) {
                    exit_button.setVisibility(View.INVISIBLE);
                }
 
                des_TextView.setVisibility(View.INVISIBLE);
 
                if (
                        baidu_button.getVisibility() == View.VISIBLE &&
                                pre_button.getVisibility() == View.VISIBLE &&
                                next_button.getVisibility() == View.VISIBLE) {
                    baidu_button.setVisibility(View.INVISIBLE);
                    pre_button.setVisibility(View.INVISIBLE);
                    next_button.setVisibility(View.INVISIBLE);
                }
                //Toast.makeText(MainActivity.this,browser_webView.getX()+" "+browser_webView.getY()+" "+browser_webView.getWidth()+" "+browser_webView.getHeight(),Toast.LENGTH_LONG).show();
            }
 
            //3指退出程序
            if (event.getPointerCount() == 3 && event.getAction() == MotionEvent.ACTION_MOVE) {
                finish();
            }
 
            //4指显示菜单
            if (event.getPointerCount() == 4) {
                baidu_button.setVisibility(View.VISIBLE);
                pre_button.setVisibility(View.VISIBLE);
                next_button.setVisibility(View.VISIBLE);
            }
 
            return false;
        }
    }
 
    class baidu_buttonOnClickListener implements View.OnClickListener {
 
        @Override
        public void onClick(View view) {
            browser_webView.loadUrl("http://www.baidu.com");
            url_EditText.setText(browser_webView.getUrl());
            baidu_button.setVisibility(View.INVISIBLE);
            pre_button.setVisibility(View.INVISIBLE);
            next_button.setVisibility(View.INVISIBLE);
        }
    }
 
    class pre_buttonOnClickListener implements View.OnClickListener {
 
        @Override
        public void onClick(View view) {
            browser_webView.goBack();
            baidu_button.setVisibility(View.INVISIBLE);
            pre_button.setVisibility(View.INVISIBLE);
            next_button.setVisibility(View.INVISIBLE);
        }
    }
 
    class next_buttonOnClickListener implements View.OnClickListener {
 
        @Override
        public void onClick(View view) {
            browser_webView.goForward();
            baidu_button.setVisibility(View.INVISIBLE);
            pre_button.setVisibility(View.INVISIBLE);
            next_button.setVisibility(View.INVISIBLE);
        }
    }
 
    class MyWebChromeClient extends WebChromeClient {
        @Override
        public boolean onJsAlert(WebView view, String url, String message, final JsResult result) {
 
            new AlertDialog.Builder(MainActivity.this).setTitle("AlertDialog").setMessage(message)
 
                    .setPositiveButton(android.R.string.ok, new AlertDialog.OnClickListener() {
 
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                            result.confirm();
                        }
                    }).setCancelable(false).show();
            return true;
        }
 
        @Override
        public boolean onJsConfirm(WebView view, String url, String message, final JsResult result) {
            new AlertDialog.Builder(MainActivity.this).setTitle("ConfirmDialog").setMessage(message).setPositiveButton(android.R.string.ok, new AlertDialog.OnClickListener() {
 
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    result.confirm();
                }
            })
 
                    .setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
 
                        @Override
                        public void onClick(DialogInterface dialogInterface, int i) {
                            result.confirm();
                        }
                    }).setCancelable(false).show();
            return true;
        }
 
        @Override
        public boolean onJsPrompt(WebView view, String url, String message, String defaultValue, final JsPromptResult result) {
 
            final LayoutInflater factory = LayoutInflater.from(MainActivity.this);
 
 
            final View dialogView = factory.inflate(R.layout.prompt_view, null);
 
 
            ((TextView) dialogView.findViewById(R.id.text)).setText(message);
 
 
            ((EditText) dialogView.findViewById(R.id.edit)).setText(defaultValue);
 
            new AlertDialog.Builder(MainActivity.this).setTitle("PromptDialog")
 
                    .setView(dialogView).setPositiveButton(android.R.string.ok,new AlertDialog.OnClickListener() {
 
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
 
                    String value = ((EditText) dialogView.findViewById(R.id.edit)).getText().toString();
                    result.confirm();
                }
            }).setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
 
                @Override
                public void onClick(DialogInterface dialogInterface, int i) {
                    result.confirm();
                }
            }).show();
            return true;
        }
    }
 
    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if ((keyCode == KeyEvent.KEYCODE_BACK) && browser_webView.canGoBack()) {
            browser_webView.goBack();
            exit_button.setVisibility(View.VISIBLE);//按返回键时显示退出按钮
            return true;
        }
        return super.onKeyDown(keyCode, event);
    }
}

activity_main.xml

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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    tools:context=".MainActivity"
    android:paddingTop="5dp">
 
    <RelativeLayout
            android:layout_width="fill_parent"
            android:layout_height="90px"
            android:id="@+id/RelativeLayout">
 
        <TextView
                android:layout_width="wrap_content"
                android:layout_height="80px"
                android:textAppearance="?android:attr/textAppearanceSmall"
                android:text="@string/input_label"
                android:id="@+id/input_label"
                android:textAlignment="center"
                android:layout_alignParentLeft="true"
                android:layout_alignParentTop="true"
                android:paddingTop="12dp"
                android:paddingLeft="10px"/>
 
        <EditText
                android:layout_width="wrap_content"
                android:layout_height="80px"
                android:id="@+id/url_EditText"
                android:layout_toLeftOf="@+id/go_button"
                android:hint="@string/piurl"
                android:singleLine="true"
                android:layout_alignParentTop="true"
                android:layout_toRightOf="@+id/input_label"
                android:layout_marginLeft="5dp"
                android:layout_marginRight="5dp"/>
 
        <Button
                style="?android:attr/buttonStyleSmall"
                android:layout_width="wrap_content"
                android:layout_height="80px"
                android:text="@string/go_button"
                android:id="@+id/go_button"
                android:layout_alignParentRight="true"
                android:layout_alignWithParentIfMissing="false"
                android:width="20px"
                android:gravity="center"
                android:layout_alignParentTop="true"
                android:layout_marginRight="5dp"/>
    </RelativeLayout>
 
    <WebView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/browser_webView"
            android:layout_marginLeft="0dp"
            android:layout_marginBottom="0dp"
            android:layout_margin="0dp"
            android:layout_alignParentLeft="true"
            android:layout_alignParentBottom="true"
            android:padding="0dp"
            android:paddingLeft="0dp"
            android:paddingTop="0dp"
            android:paddingRight="0dp"
            android:paddingBottom="0dp"
            android:layout_below="@+id/RelativeLayout"
            android:layout_alignParentRight="true"/>
 
    <Button
            style="?android:attr/buttonStyleSmall"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:text="@string/exit_button"
            android:id="@+id/exit_button"
            android:layout_alignBottom="@+id/browser_webView"
            android:layout_alignRight="@+id/browser_webView"
            android:alpha="0.4"
            android:visibility="invisible"/>
 
    <Button
            style="?android:attr/buttonStyleSmall"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/bottom_button"
            android:id="@+id/bottom_button"
            android:alpha="0.4"
            android:layout_above="@+id/top_button"
            android:layout_alignLeft="@+id/top_button"/>
 
    <Button
            style="?android:attr/buttonStyleSmall"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/top_button"
            android:id="@+id/top_button"
            android:layout_alignBaseline="@+id/browser_webView"
            android:layout_alignBottom="@+id/browser_webView"
            android:layout_alignParentRight="true"
            android:layout_marginRight="10dp"
            android:alpha="0.4"/>
 
    <Button
            style="?android:attr/buttonStyleSmall"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/baidu_button"
            android:id="@+id/baidu_button"
            android:layout_below="@+id/RelativeLayout"
            android:visibility="invisible"
            android:layout_marginLeft="20dp"
            android:alpha="0.5"/>
 
    <Button
            style="?android:attr/buttonStyleSmall"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/pre_button"
            android:id="@+id/pre_button"
            android:layout_below="@+id/baidu_button"
            android:visibility="invisible"
            android:layout_marginLeft="20dp"
            android:alpha="0.5"/>
 
    <Button
            style="?android:attr/buttonStyleSmall"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/next_button"
            android:id="@+id/next_button"
            android:layout_below="@+id/pre_button"
            android:visibility="invisible"
            android:layout_marginLeft="20dp"
            android:alpha="0.5"/>
 
    <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:inputType="textMultiLine"
            android:ems="10"
            android:id="@+id/des_TextView"
            android:layout_centerInParent="true"
            android:width="220dp"
            android:text="@string/des"
            android:textAlignment="center"
            android:textSize="@dimen/des"
            android:textColor="#030201"
            android:background="#5cbfff"
            android:padding="20dp"
            android:alpha="0.8"
            android:editable="false"/>
 
</RelativeLayout>