本文实例为大家分享了android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bitmap位图
3.展示到ImageView上
xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+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"
tools:context="com.itheima74.internetpicturelook.MainActivity">
<EditText
android:id="@+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:hint="请输入图片网址"
android:inputType="textUri"
android:text="http://b.hiphotos.baidu.com/image/pic/item/d009b3de9c82d15825ffd75c840a19d8bd3e42da.jpg" />
<Button
android:id="@+id/bt_look"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/et_url"
android:text="查看图片" />
<ScrollView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/bt_look"
android:layout_centerHorizontal="true">
<ImageView
android:id="@+id/iv"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</ScrollView>
</RelativeLayout>
java代码:
package com.itheima74.internetpicturelook;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.Toast;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
public class MainActivity extends AppCompatActivity {
private EditText et_url;
private ImageView iv;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
et_url = (EditText) findViewById(R.id.et_url);
iv = (ImageView) findViewById(R.id.iv);
findViewById(R.id.bt_look).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String path = et_url.getText().toString().trim();
if (path.isEmpty()) {
Toast.makeText(MainActivity.this, "请输入图片网址", Toast.LENGTH_SHORT).show();
} else {
//开启子线程去网络下载图片
downLoadPicture(path);
}
}
private void downLoadPicture(final String path) {
// 子线程请求网络
new Thread() {
@Override
public void run() {
try {
URL url = new URL(path);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setConnectTimeout(5000);
int responseCode = connection.getResponseCode();
if (responseCode == 200) {
InputStream inputStream = connection.getInputStream();
final Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
// 主线程更新UI
runOnUiThread(new Runnable() {
@Override
public void run() {
iv.setImageBitmap(bitmap);
}
});
}
} catch (IOException e) {
e.printStackTrace();
}
}
}.start();
}
});
}
}
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