Android用ImageView顯示本地和網上的圖片
阿新 • • 發佈：2019-02-01
ImageView是Android程式中經常用到的元件，它將一個圖片顯示到螢幕上。
在UI xml定義一個ImageView如下：
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.myimage);
ImageView image1 = (ImageView) findViewById(R.myImage.image);
//Bitmap bitmap = getLoacalBitmap("/aa/aa.jpg"); //從本地取圖片
Bitmap bitmap =
getHttpBitmap("http://blog.3gstdy.com/wp-content/themes/twentyten/images/headers/path.jpg");
//從網上取圖片
image1 .setImageBitmap(bitmap);//設定Bitmap
}
/**
* 載入本地圖片
* http://bbs.3gstdy.com
* @param url
* @return
*/
public static Bitmap getLoacalBitmap(String url) {
try {
FileInputStream fis = new FileInputStream(url);
return BitmapFactory.decodeStream(fis);
} catch (FileNotFoundException e) {
e.printStackTrace();
return null;
}
}
/**
* 從伺服器取圖片
*http://bbs.3gstdy.com
* @param url
* @return
*/
public static Bitmap getHttpBitmap(String url) {
URL myFileUrl = null;
Bitmap bitmap = null;
try {
Log.d(TAG, url);
myFileUrl = new URL(url);
} catch (MalformedURLException e) {
e.printStackTrace();
}
try {
HttpURLConnection conn = (HttpURLConnection) myFileUrl.openConnection();
conn.setConnectTimeout(0);
conn.setDoInput(true);
conn.connect();
InputStream is = conn.getInputStream();
bitmap = BitmapFactory.decodeStream(is);
is.close();
} catch (IOException e) {
e.printStackTrace();
}
return bitmap;
}