本文实例为大家分享了安卓网络图片查看器的具体代码,供大家参考,具体内容如下
效果图:
1。输入一个图片url
2。转换成位图位图
3。展示到ImageView上
xml:
& lt; & # 63; xml version=" 1.0 " encoding=" utf - 8 " & # 63;比;
& lt; RelativeLayout xmlns: android=" http://schemas.android.com/apk/res/android "
xmlns:工具=" http://schemas.android.com/tools "
android: id=癅 + id/activity_main”
android: layout_width=" match_parent "
android: layout_height=" match_parent "
android: paddingBottom=" @dimen/activity_vertical_margin”
android: paddingLeft=" @dimen/activity_horizontal_margin”
android: paddingRight=" @dimen/activity_horizontal_margin”
android: paddingTop=" @dimen/activity_vertical_margin”
工具:上下文=癱om.itheima74.internetpicturelook.MainActivity”比;
EditText & lt;
android: id=癅 + id/et_url”
android: layout_width=" match_parent "
android: layout_height=" wrap_content "
android: layout_alignParentLeft=" true "
android: layout_alignParentStart=" true "
android: layout_alignParentTop=" true "
android:提示="请输入图片网址”
android: inputType=" textUri "
android:文本=" http://b.hiphotos.baidu.com/image/pic/item/d009b3de9c82d15825ffd75c840a19d8bd3e42da.jpg "/比;
& lt;按钮
android: id=癅 + id/bt_look”
android: layout_width=" match_parent "
android: layout_height=" wrap_content "
android: layout_below=癅 + id/et_url”
android:文本="查看图片”/比;
& lt;滚动视图
android: layout_width=" wrap_content "
android: layout_height=" wrap_content "
android: layout_below=癅 + id/bt_look”
android: layout_centerHorizontal=" true "比;
& lt; ImageView
android: id=癅 + id/iv”
android: layout_width=" wrap_content "
android: layout_height=" wrap_content "/比;
& lt;/ScrollView>
& lt;/RelativeLayout>
之前
java代码:
包com.itheima74.internetpicturelook;
进口android.graphics.Bitmap;
进口android.graphics.BitmapFactory;
进口android.os.Bundle;
进口android.support.v7.app.AppCompatActivity;
进口android.view.View;
进口android.widget.EditText;
进口android.widget.ImageView;
进口android.widget.Toast;
进口java.io.IOException;
进口java.io.InputStream;
进口java.net.HttpURLConnection;
进口java.net.URL;
公开课MainActivity延伸AppCompatActivity {
私人EditText et_url;
私人ImageView第四;
@Override
保护无效onCreate(包savedInstanceState) {
super.onCreate (savedInstanceState);
setContentView (R.layout.activity_main);
EditText et_url=() findViewById (R.id.et_url);
4=(ImageView) findViewById (R.id.iv);
findViewById (R.id.bt_look)。setOnClickListener(新View.OnClickListener () {
@Override
公共空间onClick(查看v) {
.trim .toString字符串路径=et_url.getText () () ();
如果(path.isEmpty ()) {
Toast.makeText (MainActivity。:“请输入图片网址”,Toast.LENGTH_SHORT),告诉();
其他}{//开启子线程去网络下载图片
downLoadPicture(路径);
}
}
私人空间downLoadPicture(最终字符串路径){//子线程请求网络
新线程(){
@Override
公共空间run () {
尝试{
网址URL=new URL(路径);
HttpURLConnection连接=(HttpURLConnection) url.openConnection ();
connection.setRequestMethod(“获得”);
connection.setConnectTimeout (5000);
int responseCode=connection.getResponseCode ();
如果(responseCode==200) {
InputStream InputStream=connection.getInputStream ();
最后一位图的位图=BitmapFactory.decodeStream (inputStream);//主线程更新UI
runOnUiThread(新Runnable () {
@Override
公共空间run () {
iv.setImageBitmap(位图);
}
}）;
}
}捕捉(IOException e) {
e.printStackTrace ();
}
}
} .start ();
}
}）;
}
}
之前
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持。
