android_我的第一个Android程序

今天开始学Android开发，搞了一下午就完成了两个小功能，大部分时间都在调试、熟悉环境，

Android开发环境对比VS无论是安装、使用、更新都不够方便，不过慢慢适应就好

完成功能如下：

功能一：显示当前系统时间

功能二：根据编号获取城市天气

View层：

<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"

android:paddingBottom="@dimen/activity_vertical_margin"

android:paddingLeft="@dimen/activity_horizontal_margin"

android:paddingRight="@dimen/activity_horizontal_margin"

android:paddingTop="@dimen/activity_vertical_margin"

tools:context=".MainActivity" >

<TextView

android:id="@+id/show"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="@string/hello_world" />

<Button

android:id="@+id/button1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_below="@id/show"

android:onClick="getCurrentDate"

android:text="获取当前时间：" />

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignLeft="@+id/button1"

android:layout_below="@+id/button1"

android:layout_marginTop="33dp"

android:onClick="getWuHanWeather"

android:text="获取城市天气：" />

<EditText

android:id="@+id/editText1"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@+id/button1"

android:text="1"

android:ems="10" >

</EditText>

</RelativeLayout>

功能一：显示当前系统时间

public void getCurrentDate(View source) {

TextView tv = (TextView) findViewById(R.id.show);

tv.setText("当前时间:" + new java.util.Date());

}

功能二：根据编号获取城市天气

TextView response;

HttpClient httClient;

public void getWuHanWeather(View source) {

this.httClient = new DefaultHttpClient();

this.response = (TextView) findViewById(R.id.show);

accessSecret(source);

}

Handler handler = new Handler() {

public void handleMessage(Message msg) {

if (msg.what == 0x123) {

response.setText("");

response.setText(msg.obj.toString() + "\n");

}

};

public void accessSecret(View v) {

String type = "";

int inputValue=Integer.parseInt(((EditText) findViewById(R.id.editText1)).getText().toString());

if (inputValue== 1) {

type = "101200101";

} else {

type = "101200401";

}

final String cityId = type;

new Thread() {

@Override

public void run() {

// 创建一个HttpGet对象

String url = "http://www.weather.com.cn/adat/sk/" + cityId

+ ".html";

HttpGet get = new HttpGet(url);

// HttpGet get = new HttpGet(

// "http://www.weather.com.cn/adat/sk/101200101.html");

try {

// 发送GET请求

HttpResponse httpResponse = httClient.execute(get);

String json = EntityUtils.toString(

httpResponse.getEntity(), "UTF-8");

Message msg = new Message();

msg.what = 0x123;

msg.obj = json;

handler.sendMessage(msg);

} catch (Exception e) {

e.printStackTrace();

}

}.start();

}

来自为知笔记(Wiz)

巴特西

android_我的第一个Android程序

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