CSDN简单安卓客户端开发
浏览数：21 /
时间：2015年06月11日
一直是在电脑上面看CSDN的博客、资讯，今天做了个小软件在手机上面查看资讯和博客。
直接上代码：
一、首先是欢迎界面 -- LoadingActivity.java
package com.example.webviewtest;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.Window;
public class LoadingActivity extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.loading);
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
Intent mainIntent = new Intent(LoadingActivity.this,
ShowActivity.class);
startActivity(mainIntent);
finish();
}
}, 2000);
}
}
其布局文件很简单--loading.xml
<?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" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:src="@drawable/splash" />
</LinearLayout>
二、主页面--ShowActivity.java
package com.example.webviewtest;
import java.util.Timer;
import java.util.TimerTask;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.Window;
import android.webkit.WebSettings.RenderPriority;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Toast;
public class ShowActivity extends Activity {
private WebView webView;
private static Boolean isExit = false;
Timer tExit = new Timer();// 计时器
TimerTask task;
@SuppressLint("SetJavaScriptEnabled")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
webView = (WebView) findViewById(R.id.web_view);
webView.getSettings().setBuiltInZoomControls(true);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setRenderPriority(RenderPriority.HIGH);
// webView.getSettings().setBlockNetworkImage(true);
webView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// 根据传入的参数再去加载新的网页
view.loadUrl(url);
// 表示当前WebView可以处理打开新网页的请求，不用借助系统浏览器
return true;
}
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
Toast.makeText(ShowActivity.this, "呃！加载失败，也许断网了，或者不能访问！",
Toast.LENGTH_LONG).show();
}
});
webView.loadUrl("http://www.csdn.net/");
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && webView.canGoBack()) {
webView.goBack();// 返回前一个页面
return true;
}
return super.onKeyDown(keyCode, event);
}
@Override
public void onBackPressed() {
if (isExit == false) {
isExit = true;
Toast.makeText(this, "再按一次返回键回到桌面", Toast.LENGTH_SHORT).show();
task = new TimerTask() {
@Override
public void run() {
isExit = false;
}
};
tExit.schedule(task, 2000);
} else {
finish();
System.exit(0);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// TODO Auto-generated method stub
super.onCreateOptionsMenu(menu);
// 添加四个菜单项
menu.add(Menu.NONE, Menu.FIRST + 1, 1, "帮助").setIcon(
R.drawable.menu_help);
menu.add(Menu.NONE, Menu.FIRST + 2, 2, "退出").setIcon(
R.drawable.menu_quit);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case Menu.FIRST + 1:
Intent intent = new Intent(ShowActivity.this, HelpActivity.class);
startActivity(intent);
return true;
case Menu.FIRST + 2:
new AlertDialog.Builder(this)
.setTitle("退出")
.setMessage("你确定要退出CSDN吗？")
.setIcon(android.R.drawable.ic_dialog_info)
.setPositiveButton(R.string.ok,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int whichButton) {
finish();// 退出程序
}
}).setNegativeButton(R.string.cancel, null).show();
return true;
}
return false;
}
}
布局文件--activity_main.xml<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<WebView
android:id="@+id/web_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>三、帮助页面--HelpActivity.java
package com.example.webviewtest;
import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
public class HelpActivity extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.help);
}
}
布局文件--help.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<TextView
android:id="@+id/imageView1"
android:layout_width="100dp"
android:layout_height="match_parent"
android:layout_marginRight="10dp"
android:text="第一步："
android:textSize="23sp" />
<TextView
android:id="@+id/imageView1"
android:layout_width="100dp"
android:layout_height="match_parent"
android:layout_marginRight="5dp"
android:layout_marginLeft="5dp"
android:text="第二步："
android:textSize="23sp" />
<TextView
android:id="@+id/imageView1"
android:layout_width="100dp"
android:layout_height="match_parent"
android:layout_marginRight="10dp"
android:text="第三步："
android:textSize="23sp" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginTop="10dp">
<TextView
android:id="@+id/imageView1"
android:layout_width="100dp"
android:layout_height="match_parent"
android:layout_marginRight="10dp"
android:text="点击右上角图标"
android:textSize="15sp" />
<TextView
android:id="@+id/imageView1"
android:layout_width="100dp"
android:layout_height="match_parent"
android:layout_marginRight="5dp"
android:layout_marginLeft="5dp"
android:text="点击博客"
android:textSize="15sp" />
<TextView
android:id="@+id/imageView1"
android:layout_width="100dp"
android:layout_height="match_parent"
android:layout_marginRight="10dp"
android:text="点击登录"
android:textSize="15sp" />
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<ImageView
android:id="@+id/imageView1"
android:layout_width="100dp"
android:layout_height="match_parent"
android:layout_marginRight="10dp"
android:src="@drawable/first" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="100dp"
android:layout_height="match_parent"
android:layout_marginLeft="5dp"
android:layout_marginRight="5dp"
android:src="@drawable/second" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="100dp"
android:layout_height="match_parent"
android:layout_marginLeft="10dp"
android:src="@drawable/third" />
</LinearLayout>
</LinearLayout>四、最后别忘了在AndroidManifest.xml文件中添加访问网络的权限
<uses-permission android:name="android.permission.INTERNET" />
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