android欢迎界面并执行任务

<?xml version="1.0" encoding="UTF-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <ImageView        android:id="@+id/imageView1"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:scaleType="centerCrop"        android:src="@drawable/s1" />    <TextView        android:id="@+id/textView1"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="TextView" /></LinearLayout>

package com.example.start_1;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.UnsupportedEncodingException;import java.net.HttpURLConnection;import java.net.MalformedURLException;import java.net.URL;import android.os.Bundle;import android.os.Handler;import android.util.Log;import android.widget.ImageView;import android.widget.TextView;import android.app.Activity;import android.content.ContentValues;import android.content.Intent;import android.database.sqlite.SQLiteDatabase;public class WelcomeA extends Activity {private String result_weather = ""; // 声明一个代表显示内容的字符串private TextView textView1;    private ImageView  imageView1;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);textView1 = (TextView) findViewById(R.id.textView1);imageView1=(ImageView)findViewById(R.id.imageView1);new Handler().postDelayed(new Runnable() {@Overridepublic void run() {new Thread(new Runnable() {public void run() {String target = "";try {target = "http://op.juhe.cn/onebox/weather/query?cityname="+ java.net.URLEncoder.encode("合肥", "utf-8")+ "&dtype=json&key=55fae8......";/////需要自己申请} catch (UnsupportedEncodingException e1) {// TODO 自动生成的 catch 块e1.printStackTrace();}URL url;try {url = new URL(target);HttpURLConnection urlConn = (HttpURLConnection) url.openConnection(); // 创建一个HTTP连接InputStreamReader in = new InputStreamReader(urlConn.getInputStream()); // 获得读取的内容// ,从字节流转换为字符流BufferedReader buffer = new BufferedReader(in); // 获取输入流对象// ，从字符输入流中读取文本String inputLine = null;// 通过循环逐行读取输入流中的内容while ((inputLine = buffer.readLine()) != null) {result_weather += inputLine + "\n";}in.close(); // 关闭字符输入流对象urlConn.disconnect(); // 断开连接Log.i("result_weather", result_weather);} catch (MalformedURLException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}CityDBHelper dbHelper = new CityDBHelper(WelcomeA.this,"city_db", null, 1);SQLiteDatabase db = dbHelper.getWritableDatabase();ContentValues cv = new ContentValues();cv.put("city", result_weather);db.insert("city_table", null, cv);db.close();Log.i("插入成功", "插入成功");// resultTextView.setText("");}// /run()}).start();// textView1.setText(text);Intent intent = new Intent(WelcomeA.this, MainActivity.class);startActivity(intent);WelcomeA.this.finish();}}, 4000);}// /onCreate}// WelcomeA

<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="${relativePackage}.${activityClass}" >    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="@string/hello_world" /></RelativeLayout>

package com.example.start_1;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}}

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.start_1"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="15"        android:targetSdkVersion="16" />    <uses-permission android:name="android.permission.INTERNET" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name=".MainActivity"            android:label="@string/app_name" >            <intent-filter>                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <activity            android:name=".WelcomeA"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>

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