【Android】Web开发之显示网络图片的两种方法
根据URL返回一个位图格式
public Bitmap getBitMap(String strUrl) {
Bitmap bitmap = null;
InputStream is = null;
try {
URL url = new URL(strUrl);
URLConnection conn = url.openConnection();
is = conn.getInputStream();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
bitmap = BitmapFactory.decodeStream(is);
return bitmap;
}
根据URL返回Drawable
public Drawable getDrawable(String strUrl) {
Drawable drawable = null;
InputStream is = null;
try {
URL url = new URL(strUrl);
URLConnection conn = url.openConnection();
is = conn.getInputStream();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
drawable = Drawable.createFromStream(is, "src");
return drawable;
}
应用
package com.app.myweb;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URI;
import java.net.URL;
import java.net.URLConnection;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
public class ShowWebPicture extends Activity{
private Button button1,button2;
private ImageView imageView;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.showwebpicture);
button1 = (Button) findViewById(R.id.button1);
button2 = (Button) findViewById(R.id.button2);
imageView = (ImageView) findViewById(R.id.imageView1);
button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
imageView.setImageBitmap(getBitMap("http://10.0.2.2:8888/android/image01.jpg"));
}
});
button2.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
imageView.setImageDrawable(getDrawable("http://10.0.2.2:8888/android/image02.jpg"));
}
});
}
/** 根据URL返回一个位图格式 */
public Bitmap getBitMap(String strUrl) {
Bitmap bitmap = null;
InputStream is = null;
try {
URL url = new URL(strUrl);
URLConnection conn = url.openConnection();
is = conn.getInputStream();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
bitmap = BitmapFactory.decodeStream(is);
return bitmap;
}
/** 根据URL返回Drawable */
public Drawable getDrawable(String strUrl) {
Drawable drawable = null;
InputStream is = null;
try {
URL url = new URL(strUrl);
URLConnection conn = url.openConnection();
is = conn.getInputStream();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
drawable = Drawable.createFromStream(is, "src");
return drawable;
}
}