android 載入圖片

標籤：

package mydemo.mycom.demo2;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.support.v7.app.ActionBarActivity;import android.os.Bundle;import android.text.TextUtils;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.ImageView;import android.widget.Toast;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;public class ImagePrev extends ActionBarActivity implements View.OnClickListener {    private ImageView iv;    private Button btn_prev_image;    private EditText et_image_path;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_image_prev);        iv = (ImageView)findViewById(R.id.iv);        btn_prev_image = (Button)findViewById(R.id.btn_prev_image);        et_image_path = (EditText)findViewById(R.id.et_image_path);        btn_prev_image.setOnClickListener(this);    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.menu_image_prev, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        int id = item.getItemId();        if (id == R.id.action_settings) {            return true;        }        return super.onOptionsItemSelected(item);    }    @Override    public void onClick(View view) {        switch (view.getId())        {            case R.id.btn_prev_image:                String path = et_image_path.getText().toString().trim();                if(TextUtils.isEmpty(path))                {                    Toast.makeText(this,"圖片路徑不能",Toast.LENGTH_SHORT).show();                    return;                }                try                {                    //瀏覽圖片                    URL url  = new URL(path);                    HttpURLConnection conn = (HttpURLConnection)url.openConnection();                    conn.setRequestMethod("GET");                    conn.setConnectTimeout(5000);                    int code = conn.getResponseCode();                    if(code==200)                    {                        InputStream is = conn.getInputStream();                        Bitmap bitmap = BitmapFactory.decodeStream(is);                        iv.setImageBitmap(bitmap);                    }                    else                    {                        Toast.makeText(this,"圖片瀏覽失敗",Toast.LENGTH_SHORT).show();                    }                }catch (Exception e)                {                    Toast.makeText(this,"圖片瀏覽失敗",Toast.LENGTH_SHORT).show();                    e.printStackTrace();                }                break;        }    }}

Activity

<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:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:paddingBottom="@dimen/activity_vertical_margin"    android:orientation="vertical"    tools:context="mydemo.mycom.demo2.ImagePrev">    <ImageView        android:layout_weight="1000"        android:layout_width="fill_parent"        android:layout_height="fill_parent"        android:id="@+id/iv"/>    <EditText        android:text="http://192.168.1.1:91/Resource/TopicInfo/2015-05-23/130768288778069472.png"        android:hint="圖片路徑"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:id="@+id/et_image_path"/>    <Button        android:text="瀏覽"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:id="@+id/btn_prev_image"/></LinearLayout>

 

android 載入圖片