网络图片查看器

来源：互联网发布：电脑桌面图片制作软件编辑：程序博客网时间：2024/05/16 19:02

mainactivity.Java

package com.example.imagebrowser;    import java.io.IOException;  import java.io.InputStream;  import java.net.HttpURLConnection;  import java.net.MalformedURLException;  import java.net.URL;    import android.R.string;  import android.app.Activity;  import android.graphics.Bitmap;  import android.graphics.BitmapFactory;  import android.os.Bundle;  import android.os.Handler;  import android.os.Message;  import android.text.TextUtils;  import android.view.Menu;  import android.view.View;  import android.view.View.OnClickListener;  import android.widget.Button;  import android.widget.EditText;  import android.widget.ImageView;  import android.widget.Toast;    public class MainActivity extends Activity  {      public static final int SHOW_IMAGE=1;       private ImageView image;      private EditText editText1;      private Button button1;      private Handler handler=new Handler(){          public void handleMessage(android.os.Message msg){              switch(msg.what){              case SHOW_IMAGE:                  Bitmap bitmap=(Bitmap) msg.obj;                  image.setImageBitmap(bitmap);                  break;                  default:                      break;                                    }          }      };      protected void onCreate(Bundle savedInstanceState)      {          super.onCreate(savedInstanceState);          setContentView(R.layout.activity_main);          image=(ImageView) findViewById(R.id.image);          editText1=(EditText) findViewById(R.id.editText1);          button1=(Button) findViewById(R.id.button1);          button1.setOnClickListener(new OnClickListener()          {                            @Override              public void onClick(View v)              {                  if(v.getId()==R.id.button1){                      showimage(v);                  }                                }          });      }            public void showimage(View view){          final String path=editText1.getText().toString();          if(TextUtils.isEmpty(path)){                Toast.makeText(this, "图片路径不能为空", Toast.LENGTH_LONG).show();            }else{                new Thread(){                    public void run() {                        try {                            URL url=new URL(path);                            HttpURLConnection httpURLConnection=(HttpURLConnection) url.openConnection();                          httpURLConnection.setRequestMethod("GET");                            httpURLConnection.setConnectTimeout(5000);                            int responseCode=httpURLConnection.getResponseCode();                            if(responseCode==200){                               InputStream inputStream=httpURLConnection.getInputStream();                                Bitmap bitmap=BitmapFactory.decodeStream(inputStream);                                Message message=new Message();                                message.what=SHOW_IMAGE;                                message.obj=bitmap;                               handler.sendMessage(message);                              }else{                              Toast.makeText(MainActivity.this, "显示图片失败", Toast.LENGTH_SHORT).show();                          }                      }catch (MalformedURLException e) {                            e.printStackTrace();                        } catch (IOException e) {                            e.printStackTrace();                        }                    };              }.start();          }        }      public boolean onCreateOptionsMenu(Menu menu)      {          // Inflate the menu; this adds items to the action bar if it is present.          getMenuInflater().inflate(R.menu.main, menu);          return true;      }  }

activity_main.xml

<LinearLayout 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:orientation="vertical"        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" >         <ImageView            android:id="@+id/image"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:layout_gravity="center"            android:layout_weight="1"           />          <EditText          android:id="@+id/editText1"          android:layout_width="match_parent"          android:layout_height="wrap_content"          android:hint="请输入图片的路径："           android:text="http://file.popoho.com/yx/20160731/1468233135256315.jpg"          >          <requestFocus />      </EditText>        <Button            android:id="@+id/button1"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_gravity="center"            android:onClick="viewImage"            android:text="查看" />                    </LinearLayout>

0 0