实例介绍
【实例简介】
【实例截图】
【实例截图】
【核心代码】
package cn.android.browser;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import cn.android.browser.HelpTabAct;
import cn.android.browser.HistoryBean;
import cn.android.browser.HttpData;
import cn.android.browser.SQLiteHelper;
import cn.android.browser.WriteFavoriteXml;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.AlertDialog.Builder;
import android.content.ComponentName;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.os.Parcelable;
import android.util.Log;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.view.ContextMenu.ContextMenuInfo;
import android.webkit.WebBackForwardList;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
public class Main extends Activity
{
private WebView mWebView = null;
final Activity context = this;
private SQLiteHelper mOpenHelper;
public static Cursor myCursor_one;
Intent directCall;
private WriteFavoriteXml writeXml = new WriteFavoriteXml();
private ImageButton btn = null;
private EditText edit = null;
private ImageButton forwardBtn = null;
private ImageButton backBtn = null;
private ListView list = null;
private Button go_back = null;
private ImageButton menuBtn = null;
private final static int HISTORY_ITEM = 0; //历史记录
private final static int HTTP_ITEM = 1; //关于
private final static int SHORTCUT_ITEM = 2; //快捷方式
private final static int ADD_FAVORITE = 3; //加入收藏夹
private final static int FAVORITE_ITEM = 4; //收藏夹
private final static int PREFERENCE_ITEM = 5; //帮助网页
private final static int EXIT_ITEM = 7; //退出
private String cur_url = "http://m.hao123.com";
private final String ACTION_ADD_SHORTCUT = "com.android.launcher.action.INSTALL_SHORTCUT";
List<Map<String, Object>> history_data = new ArrayList<Map<String, Object>>();
List<HistoryBean> xml_data = new ArrayList<HistoryBean>();
String[] dialog_data = new String[]{};
public int selectId = 0;
SharedPreferences sp;
Drawable drawable;
private static String SAVE_KEY = "save-view";
public static Main instance;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.w("debug.onCreate","onCreate");
requestWindowFeature(Window.FEATURE_PROGRESS);//让进度条显示在标题栏上
mOpenHelper = new SQLiteHelper(this);
directCall = new Intent(Intent.ACTION_MAIN);//快捷方式
onInit();
instance = this;
if (savedInstanceState == null)
{
deleteTable();
}
else
{
Bundle map = savedInstanceState.getBundle(SAVE_KEY);
if (map != null)
{
restoreState(map);
}
}
}
private void onInit() {
setContentView(R.layout.main);
edit = (EditText)findViewById(R.id.edit_1);
mWebView = (WebView) findViewById(R.id.wv1);
btn = (ImageButton)findViewById(R.id.button_1);
forwardBtn = (ImageButton)findViewById(R.id.forward_btn);
backBtn = (ImageButton)findViewById(R.id.back_btn);
menuBtn = (ImageButton)findViewById(R.id.menu_btn);
btn.setOnClickListener( new Button.OnClickListener()
{
public void onClick( View v )
{
// TODO Auto-generated method stub
String str = edit.getText().toString();
if(str != "")
{
cur_url = str;
setTitle();
mWebView.loadUrl(str);
}
}
} );
forwardBtn.setOnClickListener( new Button.OnClickListener()
{
public void onClick( View v )
{
// TODO Auto-generated method stub
if(mWebView.canGoForward())
mWebView.goForward();
}
} );
backBtn.setOnClickListener( new Button.OnClickListener()
{
public void onClick( View v )
{
// TODO Auto-generated method stub
if(mWebView.canGoBack())
mWebView.goBack();
}
} );
menuBtn.setOnClickListener( new Button.OnClickListener()
{
public void onClick( View v )
{
context.openOptionsMenu();
}
} );
mWebView.setWebViewClient(new WebViewClient(){
public boolean shouldOverrideUrlLoading(WebView view, String url) {
mWebView.loadUrl(url);
cur_url = url;
setTitle();
//insertTable(url,1,mWebView.getTitle());
return true;
}
});
mWebView.setWebChromeClient(new WebChromeClient() {
public void onProgressChanged(WebView view, int progress) {
//Activity和Webview根据加载程度决定进度条的进度大小
//当加载到100%的时候 进度条自动消失
context.setProgress(progress * 100);
if(progress>=100)
{
insertTable(cur_url,1,view.getTitle());
}
//Log.d("TTTTTTTTT",progress "," view.getTitle());
}
});
mWebView.loadUrl(cur_url);
setTitle();
Log.i("debug.Init",cur_url);
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo)
{
Log.i("onCreateContextMenu",v.toString());
Log.i("onCreateContextMenu",String.valueOf(v.getId()));
}
private void setTitle()
{
Bitmap bitmap = mWebView.getFavicon();
drawable = new BitmapDrawable(bitmap);
//edit.setCompoundDrawables(drawable, null, null, null);
drawable = this.getResources().getDrawable(R.drawable.history);
edit.setCompoundDrawablesWithIntrinsicBounds(drawable, null,null,null);
edit.setText(cur_url);
//edit.setMaxLines(1);
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
super.onCreateOptionsMenu(menu);
menu.add(0, HISTORY_ITEM, HISTORY_ITEM, R.string.history).setIcon(R.drawable.history); //setIcon,setText
menu.add(0, HTTP_ITEM, HTTP_ITEM, R.string.http_name).setIcon(R.drawable.about);
menu.add(0, SHORTCUT_ITEM, SHORTCUT_ITEM, R.string.shortcut).setIcon(R.drawable.icon);
menu.add(0, ADD_FAVORITE, ADD_FAVORITE, R.string.addFavorite).setIcon(R.drawable.add_favorite);
menu.add(0, FAVORITE_ITEM, FAVORITE_ITEM, R.string.favorite).setIcon(R.drawable.favorite);
menu.add(1, PREFERENCE_ITEM, PREFERENCE_ITEM, R.string.preference).setIcon(R.drawable.help);
return true;
}
public boolean onOptionsItemSelected(MenuItem item)
{
switch(item.getItemId()){
case HISTORY_ITEM:
goto_history_view();
break;
case HTTP_ITEM:
showDialog(HTTP_ITEM);
break;
case SHORTCUT_ITEM:
createShortcut();
break;
case ADD_FAVORITE:
add_favorite();
break;
case FAVORITE_ITEM:
open_favorite();
break;
case PREFERENCE_ITEM:
goto_help_act();
break;
default:
break;
}
return super.onOptionsItemSelected(item);
}
private void goto_history_view()
{
getHistory();
setContentView(R.layout.history);
list = (ListView)findViewById(R.id.list);
go_back = (Button)findViewById(R.id.go_back);
SimpleAdapter adapter = new SimpleAdapter(this, getData(),
android.R.layout.simple_list_item_2, new String[] {"网页","网址"},
new int[] { android.R.id.text1 , android.R.id.text2});
// final ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
// android.R.layout.simple_list_item_1, history_data);
list.setAdapter(adapter);
go_back.setOnClickListener( new Button.OnClickListener()
{
public void onClick( View v )
{
// TODO Auto-generated method stub
onInit();
}
} );
list.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> parent, View v, int position, long id)
{
cur_url = history_data.get(position).get("网址").toString();
onInit();
}
});
}
public void copyHistoryData(WebBackForwardList mylist)
{
int i;
for (i=0;i<mylist.getSize();i )
{
Map<String, Object> item = new HashMap<String, Object>();
item.put("网页", mylist.getItemAtIndex(i).getTitle());
item.put("网址", mylist.getItemAtIndex(i).getUrl());
history_data.add(item);
//history_data.add(mylist.getItemAtIndex(i).getUrl().toString()); //查看浏览器历史
}
}
private List<Map<String, Object>> getData()
{
return history_data;
}
protected Dialog onCreateDialog(int id) //只在第一次创建时调用
{
if(id == FAVORITE_ITEM)
{
return new AlertDialog.Builder(Main.this)
.setTitle(R.string.fav_name)
.setSingleChoiceItems(dialog_data, 0, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
selectId = whichButton;
}
})
.setNeutralButton(R.string.open_btn, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
if(selectId>=0)
{
cur_url = xml_data.get(selectId).getURL();
edit.setText(cur_url);
mWebView.loadUrl(cur_url);
}
}
})
.setPositiveButton(R.string.del_btn, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
if(selectId>=0)
writeXml.Write(context,"history.xml",writeXml.deleteElement(dialog_data[selectId]));
selectId = 0;
removeDialog(FAVORITE_ITEM);
}
})
.setNegativeButton(R.string.close_btn, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
removeDialog(FAVORITE_ITEM);
}
})
.create();
}
if(id == HTTP_ITEM)
{
return new AlertDialog.Builder(Main.this)
.setTitle(R.string.http_name)
.setItems(R.array.http_array, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent();
intent.setClass(Main.this, HttpData.class);
Bundle b = new Bundle();
b.putInt("id", which 1);
b.putString("url", cur_url);
intent.putExtras(b);
startActivity(intent);
}
})
.create();
}
if(id == EXIT_ITEM)
{
return new AlertDialog.Builder(Main.this)
.setIcon(R.drawable.icon)
.setTitle(R.string.exit_title)
.setMessage(R.string.exit_message)
.setPositiveButton(R.string.ok_btn, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
finish();
}
})
.setNegativeButton(R.string.no_btn, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
})
.create();
}
return null;
}
/* 往表中插入数据 */
private void insertTable(String url, int time, String title)
{
time = (int)Math.floor(System.currentTimeMillis() / 1000 );
SQLiteDatabase db = mOpenHelper.getWritableDatabase();
myCursor_one = db.rawQuery("SELECT * FROM " SQLiteHelper.TB_NAME " where name=?" , new String[]{String.valueOf(title)});
String sql;
String tip;
if (myCursor_one.moveToFirst())
{
sql = "update " SQLiteHelper.TB_NAME
" set " HistoryBean.TIME "=" time " where " HistoryBean.NAME "='" title "'";
Log.i("update",title);
tip = "更新";
}
else
{
sql = "insert into " SQLiteHelper.TB_NAME
" (" HistoryBean.URL ", " HistoryBean.TIME ", " HistoryBean.NAME ") "
"values('" url "','" time "','" title "');";
Log.i("insert",title);
tip = "插入";
}
try {
db.execSQL(sql);
} catch (SQLException e) {
Toast.makeText(Main.this, tip "记录出错", Toast.LENGTH_LONG).show();
return;
}
Toast.makeText(Main.this, tip "了记录", Toast.LENGTH_LONG).show();
}
/* 删除过时的历史记录 */
private void deleteTable()
{
int time = (int)Math.floor(System.currentTimeMillis() / 1000 ) - 86400;
SQLiteDatabase db = mOpenHelper.getWritableDatabase();
String sql = "delete from " SQLiteHelper.TB_NAME
" where " time ">" HistoryBean.TIME;
try {
db.execSQL(sql);
} catch (SQLException e) {
Toast.makeText(Main.this, "删除记录出错", Toast.LENGTH_LONG).show();
}
}
private void getHistory()
{
SQLiteDatabase db = mOpenHelper.getWritableDatabase();
myCursor_one = db.rawQuery("SELECT * FROM " SQLiteHelper.TB_NAME, null);
int url = myCursor_one.getColumnIndex(HistoryBean.URL);
int name = myCursor_one.getColumnIndex(HistoryBean.NAME);
history_data.clear();
if (myCursor_one.moveToFirst())
{
do {
Map<String, Object> item = new HashMap<String, Object>();
item.put("网页", myCursor_one.getString(name));
item.put("网址", myCursor_one.getString(url));
history_data.add(item);
//history_data.add(myCursor_one.getString(url));
} while (myCursor_one.moveToNext());
}
myCursor_one.close();
}
private void createShortcut()
{
Intent addShortcut = new Intent(ACTION_ADD_SHORTCUT);
String numToDial = null;
Parcelable icon = null;
numToDial = "MyBrowser";
icon = Intent.ShortcutIconResource.fromContext(
this,R.drawable.icon);
addShortcut.putExtra(Intent.EXTRA_SHORTCUT_NAME, numToDial);
directCall.addCategory(Intent.CATEGORY_LAUNCHER);
directCall.setComponent(new ComponentName(this.getPackageName(),
this.getPackageName() ".Main"));
addShortcut.putExtra(Intent.EXTRA_SHORTCUT_INTENT, directCall);
addShortcut.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, icon);
sendBroadcast(addShortcut);
}
private void add_favorite()
{
String name = mWebView.getTitle();
String url = mWebView.getUrl();
if(name!=""&&url!="")
{
writeXml.Write(context,"history.xml",writeXml.insertElement(name,url));
writeXml.onReadXml();
dialog_data = writeXml.getDialogData();
xml_data = writeXml.getXmlData();
showDialog(FAVORITE_ITEM);
}
}
private void open_favorite()
{
writeXml.onReadXml();
dialog_data = writeXml.getDialogData();
xml_data = writeXml.getXmlData();
showDialog(FAVORITE_ITEM);
}
private void goto_help_act()
{
Intent intent = new Intent();
intent.setClass(context, HelpTabAct.class);
startActivity(intent);
}
public void setBlockImage(boolean flag)
{
Log.e("setBlockImage",flag==true?"true":"false");
WebSettings webSettings = mWebView.getSettings();
webSettings.setBlockNetworkImage(flag);
}
public void setCacheMode(boolean flag)
{
Log.e("setCacheMode",flag==true?"true":"false");
WebSettings webSettings = mWebView.getSettings();
if(flag)
webSettings.setCacheMode(WebSettings.LOAD_CACHE_ONLY);
else
webSettings.setCacheMode(webSettings.LOAD_NO_CACHE);
}
public void setJavaScript(boolean flag)
{
Log.e("setJavaScript",flag==true?"true":"false");
WebSettings webSettings = mWebView.getSettings();
webSettings.setJavaScriptEnabled(flag);
}
@Override protected void onResume() {
super.onResume();
Log.w("debug.onResume","onResume");
}
@Override protected void onSaveInstanceState(Bundle outState) {
outState.putBundle(SAVE_KEY, saveState());
Log.w("debug.onSaveInstanceState","onSaveInstanceState");
}
@Override protected void onPause() {
super.onPause();
Log.w("debug.onPause","onPause");
}
@Override protected void onStart() {
super.onStart();
Log.w("debug.onStart","onStart");
}
@Override protected void onRestart() {
super.onRestart();
Log.w("debug.onRestart","onRestart");
}
@Override protected void onStop() {
super.onStop();
Log.w("debug.onStop","onStop");
}
@Override protected void onDestroy() {
showDialog(EXIT_ITEM);
//super.onDestroy();
Log.w("debug.onDestroy","onDestroy");
}
public void restoreState(Bundle icicle)
{
cur_url = icicle.getString("URL");
mWebView.loadUrl(cur_url);
setTitle();
}
public Bundle saveState()
{
Bundle map = new Bundle();
map.putString("URL", cur_url);
return map;
}
@Override
public void onBackPressed()
{
dialog();
}
protected void dialog()
{
AlertDialog.Builder builder = new Builder(Main.this);
builder.setIcon(R.drawable.icon);
builder.setTitle(R.string.exit_title);
builder.setMessage(R.string.exit_message);
builder.setPositiveButton(R.string.ok_btn,
new android.content.DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
android.os.Process.killProcess(android.os.Process.myPid());
}
});
builder.setNegativeButton(R.string.no_btn,
new android.content.DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
builder.create().show();
}
}
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