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1.???????????
?????????
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<?xml version="1.0" encoding="utf-8"?>
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<LinearLayout
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xmlns:android="http://schemas.android.com/apk/res/android"
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android:orientation="vertical"
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android:layout_width="fill_parent"
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android:layout_height="fill_parent">
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<ImageView android:src="@drawable/icon"
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android:layout_width="wrap_content"
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android:id="@+id/imgPic"
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android:layout_gravity="center|center_vertical"
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android:layout_height="fill_parent">
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</ImageView>
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</LinearLayout>
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java???
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public class DownloadImage extends Activity {
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private ImageView imgPic;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.download_image);
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imgPic = (ImageView) findViewById(R.id.imgPic);
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String url = "http://ww1.sinaimg.cn/bmiddle/6834c769jw1djjf4p3p9rj.jpg";
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loadRmoteImage(url);
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}
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/**
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* @param imgUrl
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* ??????????URL
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*
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* ?????????
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*/
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private void loadRmoteImage(String imgUrl) {
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URL fileURL = null;
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Bitmap bitmap = null;
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try {
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fileURL = new URL(imgUrl);
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} catch (MalformedURLException err) {
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err.printStackTrace();
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}
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try {
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HttpURLConnection conn = (HttpURLConnection) fileURL
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.openConnection();
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conn.setDoInput(true);
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conn.connect();
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InputStream is = conn.getInputStream();
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int length = (int) conn.getContentLength();
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if (length != -1) {
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byte[] imgData = new byte[length];
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byte[] buffer = new byte[512];
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int readLen = 0;
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int destPos = 0;
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while ((readLen = is.read(buffer)) > 0) {
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System.arraycopy(buffer, 0, imgData, destPos, readLen);
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destPos += readLen;
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}
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bitmap = BitmapFactory.decodeByteArray(imgData, 0,
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imgData.length);
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}
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} catch (IOException e) {
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e.printStackTrace();
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}
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imgPic.setImageBitmap(bitmap);
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}
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2.??????????????
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public class DownloadImage extends Activity {
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private ImageView imgPic;
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private ProgressBar progressBar;
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private int totalSize=0;
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private int size=0;
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private Handler mHandler;
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String url = "http://ww1.sinaimg.cn/bmiddle/6834c769jw1djjf4p3p9rj.jpg";
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private Bitmap bitmap=null;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.download_image);
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imgPic = (ImageView) findViewById(R.id.imgPic);
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progressBar = (ProgressBar) findViewById(R.id.progressBar);
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progressBar.setProgress(getProgressInt(progressBar.getMax()));
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mHandler = new Handler() {
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public void handleMessage(Message msg) {
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progressBar.setProgress(getProgressInt(progressBar.getMax()));
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if(bitmap!=null){
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imgPic.setImageBitmap(bitmap);
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}
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}
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};
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new Thread(){
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public void run(){
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loadRmoteImage(url);
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}
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}.start();
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}
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/**
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* @param imgUrl
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* ??????????URL
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*
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* ?????????
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*/
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private void loadRmoteImage(String imgUrl) {
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URL fileURL = null;
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try {
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fileURL = new URL(imgUrl);
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} catch (MalformedURLException err) {
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err.printStackTrace();
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}
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try {
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HttpURLConnection conn = (HttpURLConnection) fileURL
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.openConnection();
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conn.setDoInput(true);
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conn.connect();
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InputStream is = conn.getInputStream();
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int length = (int) conn.getContentLength();
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totalSize=length;
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if (length != -1) {
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byte[] imgData = new byte[length];
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byte[] buffer = new byte[512];
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int readLen = 0;
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int destPos = 0;
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while ((readLen = is.read(buffer)) > 0) {
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System.arraycopy(buffer, 0, imgData, destPos, readLen);
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destPos += readLen;
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size=destPos;
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mHandler.sendEmptyMessage(1);
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Thread.sleep(100);
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}
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bitmap = BitmapFactory.decodeByteArray(imgData, 0,
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imgData.length);
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mHandler.sendEmptyMessage(1);
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}
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} catch (IOException e) {
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e.printStackTrace();
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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}
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private int getProgressInt(int max) {
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int result = (totalSize > 0) ? (int) (size * max * 1.0 / totalSize) : 0;
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return result;
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}
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}
???????
????????????????????Bitmap???????????????????????byte[]????????bitmap????????????InputStream????bitmap??
? ????????byte[]????????bitmap
onCreate{
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byte[] data = getImage(filePath);
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if(data!=null){
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bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);// bitmap
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imageView.setImageBitmap(bitmap);// display image
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}else{
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Toast.makeText(AndroidTest2_3_3.this, "Image error!", 1).show();
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}
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}
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public byte[] getImage(String path) throws Exception{
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URL url = new URL(path);
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HttpURLConnection conn = (HttpURLConnection) url.openConnection();
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conn.setConnectTimeout(5 * 1000);
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conn.setRequestMethod("GET");
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InputStream inStream = conn.getInputStream();
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if(conn.getResponseCode() == HttpURLConnection.HTTP_OK){
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return readStream(inStream);
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}
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return null;
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}
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public static byte[] readStream(InputStream inStream) throws Exception{
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ByteArrayOutputStream outStream = new ByteArrayOutputStream();
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byte[] buffer = new byte[1024];
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int len = 0;
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while( (len=inStream.read(buffer)) != -1){
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outStream.write(buffer, 0, len);
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}
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outStream.close();
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inStream.close();
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return outStream.toByteArray();
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}
?????????InputStream
onCreate{
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bitmap = BitmapFactory.decodeStream(getImageStream(filePath));
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if (bitmap != null) {
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imageView.setImageBitmap(bitmap);// display image
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}
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//********************************************************************/
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Log.d(TAG, "set image ...");
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} catch (Exception e) {
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Toast.makeText(AndroidTest2_3_3.this,"Newwork error!", 1).show();
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e.printStackTrace();
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}
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}
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public InputStream getImageStream(String path) throws Exception{
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URL url = new URL(path);
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HttpURLConnection conn = (HttpURLConnection) url.openConnection();
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conn.setConnectTimeout(5 * 1000);
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conn.setRequestMethod("GET");
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if(conn.getResponseCode() == HttpURLConnection.HTTP_OK){
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return conn.getInputStream();
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}
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return null;
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}
???????
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public void saveFile(Bitmap bm, String fileName) throws IOException {
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File dirFile = new File(ALBUM_PATH);
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if(!dirFile.exists()){
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dirFile.mkdir();
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}
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File myCaptureFile = new File(ALBUM_PATH + fileName);
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BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(myCaptureFile));
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bm.compress(Bitmap.CompressFormat.JPEG, 80, bos);
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bos.flush();
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bos.close();
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}
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