联网找图的小程序

                                                      
联网找图的小程序

程序运行的图片



源代码

1.public class MainActivity extends Activity {
private EditText etImageUrl;
private ImageView ivImage;
public static final int SHOWIMAGE = 1;
public static final int SHOWFAIL = 0;
// Handler 处理事件
private Handler handler = new Handler() {
public void handleMessage(android.os.Message msg) {
switch (msg.what) {
case SHOWIMAGE:
Bitmap bitmap = (Bitmap) msg.obj;
ivImage.setImageBitmap(bitmap);
break;

case SHOWFAIL:
ivImage.setImageResource(R.drawable.button_bg);
Toast.makeText(MainActivity.this, "显示图片失败", Toast.LENGTH_LONG)
.show();
break;

default:
break;
}
};
};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initViews();
ivImage.setImageResource(R.drawable.button_bg);
}

// 查找的ID
private void initViews() {
etImageUrl = (EditText) findViewById(R.id.etImageUrl);
ivImage = (ImageView) findViewById(R.id.ivImage);
}

// 按钮点击事件
public void viewImage(View view) {
final String imageUrl = etImageUrl.getText().toString();
if (TextUtils.isEmpty(imageUrl)) {
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(imageUrl);
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 = SHOWIMAGE;
message.obj = bitmap;
// ivImage.setImageBitmap(bitmap);
handler.sendMessage(message);
} else {
Message message = new Message();
message.what = SHOWFAIL;
handler.sendMessage(message);
}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}.start();
}
}
}


2.

<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/ivImage"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_weight="1" />

<EditText
android:id="@+id/etImageUrl"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint="璇疯緭鍏ュ浘鐗囩殑鍦板潃"
android:text="http://avatar.csdn.net/C/9/A/1_yf210yf.jpg" />

<Button
android:id="@+id/btnView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="@drawable/button_bg"
android:onClick="viewImage"
android:text="娴忚" />

</LinearLayout>