android练习一之获取网页源码

//activity_main.xml

<LinearLayoutxmlns: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:context="com.vic.getwebresource.MainActivity"><EditTextandroid:id="@+id/editText1"android:layout_width="match_parent"android:layout_height="wrap_content"android:layout_alignParentLeft="true"android:layout_alignParentTop="true"android:ems="10"android:text="http://"><requestFocus/></EditText><Buttonandroid:id="@+id/get"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="获取"/><ScrollViewandroid:layout_width="match_parent"android:layout_height="wrap_content"><TextViewandroid:id="@+id/textView1"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_alignParentLeft="true"android:layout_below="@+id/editText1"android:padding="5dp"android:text="先输入网址，网址加www和不加有区别"android:textStyle="bold"/></ScrollView></LinearLayout>

//MainActivity.java

packagecom.vic.getwebresource;importjava.io.IOException;importorg.apache.http.client.ClientProtocolException;importorg.apache.http.client.ResponseHandler;importorg.apache.http.client.methods.HttpGet;importorg.apache.http.impl.client.BasicResponseHandler;importorg.apache.http.impl.client.DefaultHttpClient;importandroid.app.Activity;importandroid.os.Bundle;importandroid.os.Handler;importandroid.os.Message;importandroid.view.View;importandroid.view.View.OnClickListener;importandroid.widget.Button;importandroid.widget.EditText;importandroid.widget.TextView;importandroid.widget.Toast;/***@authorbpm-dev**/publicclassMainActivityextendsActivityimplementsOnClickListener{privateEditTextinUrl;//输入的链接privateTextViewresult;//获取的结果源码privateButtonget;//获取按钮privatestaticfinalintMSG_SUCCESS=0;privatestaticfinalintMSG_FAILURE=1;privateHandlermHandler=null;privateThreadhttpClientThread;@OverrideprotectedvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);init();}/***实例化控件*/privatevoidinit(){inUrl=(EditText)findViewById(R.id.editText1);result=(TextView)findViewById(R.id.textView1);get=(Button)findViewById(R.id.get);//第三种方式实现监听-接口实现get.setOnClickListener(this);mHandler=newHandler(){@OverridepublicvoidhandleMessage(Messagemsg){switch(msg.what){caseMSG_SUCCESS:Toast.makeText(getApplicationContext(),"连接成功...",Toast.LENGTH_SHORT).show();//连接成功，将结果显示result.setText((String)msg.obj);break;caseMSG_FAILURE:Toast.makeText(getApplicationContext(),"连接失败...",Toast.LENGTH_SHORT).show();break;default:break;}}};}/***接口实现监听事件*获取按钮点击事件*/@OverridepublicvoidonClick(Viewv){if(v.getId()==R.id.get){Toast.makeText(MainActivity.this,"正在获取...",0).show();//进行连接httpClientThread=newThread(httpClientRunnable);httpClientThread.start();}}RunnablehttpClientRunnable=newRunnable(){//将获取到的源文件放在TextView上@Overridepublicvoidrun(){httpClientWebData(inUrl.getText().toString());}};/***Get连接*@paramUrl输入的链接*/protectedvoidhttpClientWebData(StringUrl){//获取网页源文件DefaultHttpClienthttpClient=newDefaultHttpClient();HttpGethttpGet=newHttpGet(Url);ResponseHandler<String>responseHandler=newBasicResponseHandler();try{Stringcontent=httpClient.execute(httpGet,responseHandler);mHandler.obtainMessage(MSG_SUCCESS,content).sendToTarget();}catch(ClientProtocolExceptione){e.printStackTrace();}catch(IOExceptione){e.printStackTrace();}}}

//AndroidManifest.xml

<?xmlversion="1.0"encoding="utf-8"?><manifestxmlns:android="http://schemas.android.com/apk/res/android"package="com.vic.getwebresource"android:versionCode="1"android:versionName="1.0"><uses-sdkandroid:minSdkVersion="14"android:targetSdkVersion="16"/><!--连网权限--><uses-permissionandroid:name="android.permission.INTERNET"/><uses-permissionandroid:name="android.permission.ACCESS_WIFI_STATE"/><applicationandroid:allowBackup="true"android:icon="@drawable/ic_launcher"android:label="@string/app_name"android:theme="@style/AppTheme"><activityandroid:name=".MainActivity"android:label="@string/app_name"><intent-filter><actionandroid:name="android.intent.action.MAIN"/><categoryandroid:name="android.intent.category.LAUNCHER"/></intent-filter></activity></application></manifest>

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