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package
com.rong05.webview;import
java.io.FileInputStream;import
java.io.FileNotFoundException;import
java.io.FileOutputStream;import
java.io.IOException;import
java.util.ArrayList;import
java.util.HashMap;import
java.util.List;import
java.util.Map;import
android.app.Activity;import
android.os.Bundle;import
android.view.View;import
android.view.View.OnClickListener;import
android.widget.AdapterView;import
android.widget.AdapterView.OnItemClickListener;import
android.widget.Button;import
android.widget.ListView;import
android.widget.SimpleAdapter;public
class
History extends
Activity { ListView
list; Button
back,clear; private
List<Map<String,String>> historyList = new
ArrayList<Map<String,String>>(); SimpleAdapter
adapter; String
wordsTitle[]; String
wordsHistory[]; @Override protected
void
onCreate(Bundle savedInstanceState) { //
TODO Auto-generated method stub super.onCreate(savedInstanceState); super.setContentView(R.layout.history); list=(ListView)
findViewById(R.id.historylist); back=(Button)
findViewById(R.id.back); clear=(Button)
findViewById(R.id.clear); getHistory(); getTitles(); for(int
i=0;i<wordsHistory.length&&i<wordsTitle.length;i++){ Map<String,String>
map=new
HashMap<String, String>(); map.put("title",wordsTitle[i]); map.put("history",wordsHistory[i]); historyList.add(map); } adapter=new
SimpleAdapter(getApplicationContext(),historyList,R.layout.data_list,new
String[]{"title","history"},new
int[]{R.id.textView1,R.id.textView2}); list.setAdapter(adapter); list.setOnItemClickListener(listlistener); back.setOnClickListener(backListener); clear.setOnClickListener(clearListener); } //读取history.txt中的历史信息 void
getHistory(){ FileInputStream
fis=null; try
{ fis=openFileInput("history.txt");
}
catch
(FileNotFoundException e) { //
TODO Auto-generated catch block e.printStackTrace(); } try
{ byte[]
bate=new
byte[fis.available()]; while(fis.read(bate)!=-1){ } String
str=new
String(bate); wordsHistory=str.split(";"); }
catch
(IOException e) { //
TODO Auto-generated catch block e.printStackTrace(); } } //读取title.txt中的网页标题 void
getTitles(){ FileInputStream
fis=null; try
{ fis=openFileInput("title.txt");
}
catch
(FileNotFoundException e) { //
TODO Auto-generated catch block e.printStackTrace(); } try
{ byte[]
bate=new
byte[fis.available()]; while(fis.read(bate)!=-1){ } String
str=new
String(bate); wordsTitle=str.split(";"); }
catch
(IOException e) { //
TODO Auto-generated catch block e.printStackTrace(); } } //实现ListView的事件 OnItemClickListener
listlistener=new
OnItemClickListener() { @Override public
void
onItemClick(AdapterView<?> arg0, View arg1, int
arg2, long
arg3) { //
TODO Auto-generated method stub //将信息返回到mainActivity中 History.this.getIntent().putExtra("retmsg",historyList.get(arg2).get("history")); History.this.setResult(RESULT_OK,History.this.getIntent()); History.this.finish(); } }; //对返回按键的监听 OnClickListener
backListener=new
OnClickListener() { @Override public
void
onClick(View v) { //
TODO Auto-generated method stub History.this.setResult(RESULT_CANCELED,
getIntent()); //停止当前页面 History.this.finish(); } }; //对清除历史记录按键的监听 OnClickListener
clearListener=new
OnClickListener() { @Override public
void
onClick(View v) { //
TODO Auto-generated method stub deleteHistory(); deleteTitle(); //让ListView清空 list.removeAllViewsInLayout(); } }; //删除history.txt的内容 void
deleteHistory(){ FileOutputStream
fos=null; try
{ fos=openFileOutput("history.txt",MODE_PRIVATE); try
{ fos.write("".getBytes()); }
catch
(IOException e) { //
TODO Auto-generated catch block e.printStackTrace(); } }
catch
(FileNotFoundException e) { //
TODO Auto-generated catch block e.printStackTrace(); }
try
{ fos.flush(); fos.close(); }
catch
(IOException e) { //
TODO Auto-generated catch block e.printStackTrace(); } } //删除title.txt的内容 void
deleteTitle(){ FileOutputStream
fos=null; try
{ fos=openFileOutput("title.txt",MODE_PRIVATE); try
{ fos.write("".getBytes()); }
catch
(IOException e) { //
TODO Auto-generated catch block e.printStackTrace(); } }
catch
(FileNotFoundException e) { //
TODO Auto-generated catch block e.printStackTrace(); }
try
{ fos.flush(); fos.close(); }
catch
(IOException e) { //
TODO Auto-generated catch block e.printStackTrace(); } }} |
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package
com.rong05.webview;import
java.io.FileNotFoundException;import
java.io.FileOutputStream;import
java.io.IOException;import
android.annotation.SuppressLint;import
android.app.Activity;import
android.content.Intent;import
android.graphics.Bitmap;import
android.os.Bundle;import
android.util.FloatMath;import
android.view.KeyEvent;import
android.view.Menu;import
android.view.MotionEvent;import
android.view.View;import
android.view.View.OnClickListener;import
android.webkit.ValueCallback;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.FrameLayout;import
android.widget.ProgressBar;public
class
WebMainActivity extends
Activity { Button
go,next,last,history; EditText
input; WebView
web; ProgressBar
progress; static
double
beforeLenght=0,changeLenght=0; static
String FILE_NAME="history.txt"; @SuppressLint("SetJavaScriptEnabled")
@Override protected
void
onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_web_main); findView(); web.loadUrl("http://baidu.com"); web.setWebViewClient(client); WebSettings
setter=web.getSettings(); //实现JavaScrip setter.setJavaScriptEnabled(true); //实现网页的缩放 setter.setBuiltInZoomControls(true); setter.setJavaScriptCanOpenWindowsAutomatically(true); setter.setGeolocationEnabled(true); web.setWebChromeClient(chromeClient);
go.setOnClickListener(new
Action()); next.setOnClickListener(new
Action()); last.setOnClickListener(new
Action()); history.setOnClickListener(new
Action()); if(WebMainActivity.changeLenght>WebMainActivity.beforeLenght) web.zoomIn();
else if(WebMainActivity.changeLenght<WebMainActivity.beforeLenght) web.zoomOut(); } /** *
对WebView的实现其中的方法 *
*/ WebViewClient
client=new
WebViewClient(){ //该方法是让网页在WebView中显示不调用本地浏览器 @Override public
boolean
shouldOverrideUrlLoading(WebView view, String url) { //
TODO Auto-generated method stub return
super.shouldOverrideUrlLoading(view,
url); } //对历史记录的刷新 @Override public
void
doUpdateVisitedHistory(WebView view, String url, boolean
isReload) { //
TODO Auto-generated method stub last.setEnabled(web.canGoBack());
next.setEnabled(web.canGoForward()); super.doUpdateVisitedHistory(view,
url, isReload); } //在读完网页后对其进行的操作 @Override public
void
onPageFinished(WebView view, String url) { //设置程序的标题为网页的标题
if
(web.getTitle() != null)
{ WebMainActivity.this.setTitle(web.getTitle());
getTitles(web.getTitle()); getHistory(url); }
} //在开始读取网页时对其进行的操作 @Override public
void
onPageStarted(WebView view, String url, Bitmap favicon) { //
TODO Auto-generated method stub WebMainActivity.this.setTitle("Loading...");
last.setEnabled(web.canGoBack());
next.setEnabled(web.canGoForward());
super.onPageStarted(view,
url, favicon); }
}; /** *
对WebView的实现其中 WebChromeClient的方法 */ WebChromeClient
chromeClient=new
WebChromeClient(){ //实现进度条 @Override public
void
onProgressChanged(WebView view, int
newProgress) { //
TODO Auto-generated method stub super.onProgressChanged(view,
newProgress); progress.setProgress(newProgress); } //对历史记录的刷新 @Override public
void
getVisitedHistory(ValueCallback<String[]> callback) { //
TODO Auto-generated method stub super.getVisitedHistory(callback); } }; //实现Button的按钮的动作 public
class
Action implements
OnClickListener{ @Override public
void
onClick(View v) { //
TODO Auto-generated method stub switch(v.getId()){ case
R.id.go: WebMainActivity.this.web.loadUrl(WebMainActivity.this.input.getText().toString().trim()); WebMainActivity.this.input.setText("http://"); break; case
R.id.last: if(WebMainActivity.this.web.canGoBack()) WebMainActivity.this.web.goBack(); else v.setClickable(false); break; case
R.id.next: if(WebMainActivity.this.web.canGoForward()) WebMainActivity.this.web.goForward(); else v.setClickable(false); break; case
R.id.history: //跳转到History页面 Intent
intent=new
Intent(getApplicationContext(),History.class); WebMainActivity.this.startActivityForResult(intent,
1); break; default: break; } } } /** *
实现触摸事件 */ @Override public
boolean
onTouchEvent(MotionEvent event) { //
TODO Auto-generated method stub if(event.getHistorySize()==2) switch(event.getAction()) { case
MotionEvent.ACTION_DOWN: WebMainActivity.beforeLenght=Spacing(event); case
MotionEvent.ACTION_UP: WebMainActivity.changeLenght=Spacing(event); default: break; } return
super.onTouchEvent(event); } /** *
计算两指的距离 *
@param event *
@return */ private
float
Spacing(MotionEvent event) { float
x = event.getX(0)
- event.getX(1); float
y = event.getY(0)
- event.getY(1); return
FloatMath.sqrt(x * x + y * y); } //findViewById实现布局中的控件 public
void
findView(){ go=(Button)findViewById(R.id.go); next=(Button)findViewById(R.id.next); last=(Button)findViewById(R.id.last); history=(Button)findViewById(R.id.history); input=(EditText)findViewById(R.id.inputText); web=(WebView)findViewById(R.id.web); progress=(ProgressBar)findViewById(R.id.progress); } //得到历史信息写入history.txt public
void
getHistory(String url){ FileOutputStream
fos = null; try
{ fos=openFileOutput(FILE_NAME,
MODE_APPEND); try
{ fos.write((url+";").getBytes()); }
catch
(IOException e) { //
TODO Auto-generated catch block e.printStackTrace(); } }
catch
(FileNotFoundException e) { //
TODO Auto-generated catch block e.printStackTrace(); } finally{ if(fos!=null){ try
{ fos.flush(); fos.close(); }
catch
(IOException e) { //
TODO Auto-generated catch block e.printStackTrace(); } } } } //得到网页的标题写入title.txt public
void
getTitles(String url){ FileOutputStream
fos = null; try
{ fos=openFileOutput("title.txt",
MODE_APPEND); try
{ fos.write((url+";").getBytes()); }
catch
(IOException e) { //
TODO Auto-generated catch block e.printStackTrace(); } }
catch
(FileNotFoundException e) { //
TODO Auto-generated catch block e.printStackTrace(); } finally{ if(fos!=null){ try
{ fos.flush(); fos.close(); }
catch
(IOException e) { //
TODO Auto-generated catch block e.printStackTrace(); } } } } /** *
对History的Activity的返回信息进行操作 */ @Override protected
void
onActivityResult(int
requestCode, int
resultCode, Intent data) { //
TODO Auto-generated method stub switch(resultCode){ case
RESULT_OK: web.loadUrl(data.getStringExtra("retmsg")); break; case
RESULT_CANCELED: break; default: break; } } //对返回键的重写 @Override public
boolean
onKeyDown(int
keyCode, KeyEvent event) { //
TODO Auto-generated method stub if(keyCode==KeyEvent.KEYCODE_BACK){ if(web.canGoBack()){ web.goBack(); return
true; } else{ System.exit(0); } } return
super.onKeyDown(keyCode,
event); } @Override protected
void
onPause() { //
TODO Auto-generated method stub web.pauseTimers(); if(isFinishing()){ web.loadUrl("about:blank"); setContentView(new
FrameLayout(this)); } super.onPause(); } @Override protected
void
onResume() { //
TODO Auto-generated method stub super.onResume(); web.resumeTimers(); } @Override public
boolean
onCreateOptionsMenu(Menu menu) { //
Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.web_main,
menu); return
true; }} |
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<LinearLayout
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" android:orientation="vertical" tools:ignore="WebViewLayout,TextFields,HardcodedText,InefficientWeight,ButtonStyle"
> <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <Button android:id="@+id/go" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/go"
/> <EditText android:id="@+id/inputText" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="http://"/> </LinearLayout> <ProgressBar android:id="@+id/progress" style="?android:attr/progressBarStyleHorizontal" android:layout_width="fill_parent" android:layout_height="wrap_content"
/> <FrameLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_weight="1"
> <WebView android:id="@+id/web" android:layout_width="wrap_content" android:layout_height="wrap_content"
/> </FrameLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:gravity="center" android:orientation="horizontal" > <Button android:id="@+id/last" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/last"
/> <Button android:id="@+id/next" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/next"
/> <Button android:id="@+id/history" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/history"
/> </LinearLayout></LinearLayout> |
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<?xml
version="1.0"
encoding="utf-8"?><LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"
> <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="15pt" android:text="TextView"
/> <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textSize="5pt" android:text="TextView"
/></LinearLayout> |
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<?xml
version="1.0"
encoding="utf-8"?><LinearLayout
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" android:orientation="vertical" tools:ignore="ButtonStyle,InefficientWeight"
> <FrameLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_weight="1"
> <ListView android:id="@+id/historylist" android:layout_width="fill_parent" android:layout_height="wrap_content" > </ListView> </FrameLayout> <LinearLayout android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="center" android:orientation="horizontal"
> <Button android:id="@+id/back" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/back"
/> <Button android:id="@+id/clear" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/clear"
/> </LinearLayout></LinearLayout> |
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原文地址：http://blog.csdn.net/u014311051/article/details/42283121
