查看网络资源
1、网络图片查看器
public class HandlerSearchImageSourceActivity extends Activity {
private EditText imagepath;
private ImageView imageview;
private int code;
private String path;
private HttpURLConnection conn;
//在主线程里面 创建一个消息处理器
private Handler handler = new Handler(){
//接受处理消息的方法
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
Bitmap bitmap = (Bitmap) msg.obj;
imageview.setImageBitmap(bitmap);
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.handlersearchimage);
imagepath = (EditText) findViewById(R.id.et_imagepath2);
imageview = (ImageView) findViewById(R.id.iv_imageview2);
imagepath.setText("http://pic.nipic.com/2007-11-09/2007119121849495_2.jpg");//在这里为了方便演示，直接将一个图片网址放上去
}
public void bt_searchimage2(View view){
path = imagepath.getText().toString().trim();
if(TextUtils.isEmpty(path)){
Toast.makeText(this, "抱歉，图片的网络路径不能为空", 1).show();
}else{
new Thread(){
public void run(){
//下载网络上的图片，显示到imageview里面
try {
URL url = new URL(path);//1、创建URL对象
conn = (HttpURLConnection) url.openConnection();//2、通过URL对象打开http连接
conn.setRequestMethod("GET");//conn默认采用的是get方式获取数据
conn.setConnectTimeout(5000);
//conn.setRequestProperty("Accept", "text/html,application/xhtml+xml,*/*");
code = conn.getResponseCode();
//200 OK 400文件不存在 503服务器内部错误
if(code==200){
//得到服务器返回的数据
InputStream is = conn.getInputStream();
final Bitmap bitmap = BitmapFactory.decodeStream(is);
//子线程不可以直接修改UI
/*runOnUiThread(new Runnable(){
public void run() {
imageview.setImageBitmap(bitmap);
}
});*/
//拿着主线程的handler发消息去更新UI
Message msg = new Message();
msg.obj = bitmap;//把获取到bitmap放到消息盒子里 主线程
handler.sendMessage(msg);
is.close();
}else{
Toast.makeText(HandlerSearchImageSourceActivity.this, "请求 失败", 1).show();
}
} catch (Exception e) {
e.printStackTrace();
}
};
}.start();
}
}
}
<?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"
android:background="#ffffff" >
<EditText
android:id="@+id/et_imagepath2"
android:inputType="text"
android:singleLine="true"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="#000000"
android:text="请输入图片路径"/>
<Button
android:onClick="bt_searchimage2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="查看图片"
android:textColor="#000000" />
<ImageView
android:id="@+id/iv_imageview2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
运行，点击查看图片
2、网络HTML查看器
public class SearchHtmlCodeActivity extends Activity {
protected static final int SUCCESS = 1;
protected static final int ERROR = 2;
private EditText htmlpath;
private TextView htmlcode;
private String path;
private HttpURLConnection conn;
private int code;
private Handler handler = new Handler(){
//接受处理消息的方法
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
switch (msg.what) {
case SUCCESS:
String result = (String) msg.obj;
htmlcode.setText(result);
break;
case ERROR:
Toast.makeText(SearchHtmlCodeActivity.this, "访问网络失败", 0).show();
break;
}
}
};
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.searchhtmlcode);
htmlpath = (EditText) findViewById(R.id.et_htmlpath);
htmlpath.setText("https://www.cnblogs.com/boket/p/6782248.html");
htmlcode = (TextView) findViewById(R.id.tv_result);
}
public void bt_searchhtmlcode(View view){
path = htmlpath.getText().toString().trim();
new Thread(){
public void run(){
try {
URL url = new URL(path);
conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setConnectTimeout(5000);
code = conn.getResponseCode();
if(code==200){
InputStream is = conn.getInputStream();
String result = StreamsTools.readStream(is);
Message msg = new Message();
msg.what = SUCCESS;
msg.obj = result;
handler.sendMessage(msg);
is.close();
}else{}
} catch (Exception e) {
e.printStackTrace();
Message msg = new Message();
msg.what = ERROR;
handler.sendMessage(msg);
}
};
}.start();
}
}
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#ffffff" >
<EditText
android:id="@+id/et_htmlpath"
android:inputType="text"
android:singleLine="true"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:textColor="#000000"
android:text="请输入网页路径"/>
<Button
android:onClick="bt_searchhtmlcode"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="查看源码"
android:textColor="#000000" />
<ScrollView
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:scrollbars="none">
<TextView
android:id="@+id/tv_result"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:textColor="#ff0000"/>
</ScrollView>
</LinearLayout>
运行，点击查看源码
3、SmartImageView
activity：
public class SmartImageViewActivity extends Activity {
private SmartImageView siv;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.smartimageview);
//SmartImageView siv = new SmartImageView(this);
siv = (SmartImageView) findViewById(R.id.iv_smartimageview);
siv.setImageURL("http://pic.nipic.com/2007-11-09/2007119123053767_2.jpg");
}
}
写一个SmartImageView类：
/***能够直接显示一个网络上的图片，接受一个网络上图片的地址**/
public class SmartImageView extends ImageView {
private int code;
private HttpURLConnection conn;
private Handler handler = new Handler(){
@Override
public void handleMessage(Message msg) {
//super.handleMessage(msg);
Bitmap bitmap = (Bitmap) msg.obj;
setImageBitmap(bitmap);
}
};
public SmartImageView(Context context) {
super(context);
}
public SmartImageView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public SmartImageView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
/***直接设置一个网络的路径给imageview去显示**/
public void setImageURL(final String path){
new Thread(){
public void run(){
try {
URL url = new URL(path);//1、创建URL对象
conn = (HttpURLConnection) url.openConnection();//2、通过URL对象打开http连接
conn.setRequestMethod("GET");//conn默认采用的是get方式获取数据
conn.setConnectTimeout(5000);
//conn.setRequestProperty("Accept", "text/html,application/xhtml+xml,*/*");
code = conn.getResponseCode();
if(code==200){
//得到服务器返回的数据
InputStream is = conn.getInputStream();
final Bitmap bitmap = BitmapFactory.decodeStream(is);
Message msg = new Message();
msg.obj = bitmap;//吧获取到bitmap放到消息盒子里 主线程
handler.sendMessage(msg);
is.close();
}else{}
} catch (Exception e) {
e.printStackTrace();
}
};
}.start();
}
}
布局文件：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical"
android:background="#ffffff" >
<cn.edu.hezeu.jsj.web.SmartImageView
android:id="@+id/iv_smartimageview"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</LinearLayout>
运行：
