1.软件产品说明：
2.界面代码
1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout 3 xmlns:android="http://schemas.android.com/apk/res/android" 4 android:layout_width="match_parent" 5 android:layout_height="match_parent" 6 android:orientation="vertical" 7 > 8 9 <TextView 10 android:layout_width="match_parent" 11 android:layout_height="wrap_content" 12 android:gravity="center" 13 android:text="学生管理系统" 14 android:textSize="25dp" /> 15 16 <EditText 17 android:id="@+id/et_name" 18 android:layout_width="match_parent" 19 android:layout_height="wrap_content" 20 android:hint="请输入学号" /> 21 22 <EditText 23 android:id="@+id/et_password" 24 android:layout_width="match_parent" 25 android:layout_height="wrap_content" 26 android:hint="请输入密码" /> 27 28 29 <LinearLayout 30 android:layout_width="match_parent" 31 android:layout_height="wrap_content" 32 android:gravity="center"> 33 34 35 <Button 36 android:id="@+id/submit" 37 android:layout_width="wrap_content" 38 android:layout_height="wrap_content" 39 android:text="登录" /> 40 41 <Button 42 android:id="@+id/quit" 43 android:layout_width="wrap_content" 44 android:layout_height="wrap_content" 45 android:text="退出" /> 46 47 </LinearLayout> 48 49 50 </LinearLayout>
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <ImageView android:id="@+id/img" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:src="@mipmap/ic_launcher" /> <Button android:id="@+id/btn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:text="修改头像" android:textColor="@android:color/black" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="姓名:" android:textColor="@android:color/black" /> <EditText android:layout_width="match_parent" android:layout_height="wrap_content" android:textColor="@android:color/black" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="25dp"> <TextView android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:text="性别:" android:textColor="@android:color/black" /> <RadioButton android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:text="男" /> <RadioButton android:layout_width="0dp" android:layout_height="wrap_content" android:layout_weight="1" android:text=" 女" /> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="25dp"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="班级:" android:textColor="@android:color/black" /> <EditText android:layout_width="match_parent" android:layout_height="wrap_content" android:textColor="@android:color/black" /> </LinearLayout> </LinearLayout>
3.Java代码
import android.content.DialogInterface; import android.content.Intent; import android.support.annotation.Nullable; import android.support.v7.app.AlertDialog; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.Toast; public class MainActivity extends AppCompatActivity { private Button submit; private Button quit; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.login); submit = (Button) findViewById(R.id.submit); quit = (Button) findViewById(R.id.quit); submit.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(MainActivity.this, ZhuActivity.class); startActivity(intent); } }); quit.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this); builder.setTitle("提示").setMessage("退出吗？").setIcon(R.mipmap.ic_launcher).setPositiveButton("确定", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(MainActivity.this, "确定", Toast.LENGTH_SHORT).show(); finish(); } }).setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { Toast.makeText(MainActivity.this, "取消", Toast.LENGTH_SHORT).show(); } }).show(); } }); } }
import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.ImageView; import java.io.IOException; import java.io.InputStream; import java.net.HttpURLConnection; import java.net.URL; /** * Created by lenovo on 2017/3/28. */ public class ZhuActivity extends AppCompatActivity { private ImageView img; Handler handler = new Handler() { public void handleMessage(android.os.Message msg) { img.setImageBitmap((Bitmap) msg.obj); } }; private Button btn; public Bitmap getInternetPicture(String UrlPath) { HttpURLConnection httpURLConnection = null; Bitmap bm = null; try { URL url = new URL(UrlPath); httpURLConnection = (HttpURLConnection) url.openConnection(); httpURLConnection.setRequestMethod("GET"); httpURLConnection.setReadTimeout(5000); httpURLConnection.setConnectTimeout(10000); int responseCode = httpURLConnection.getResponseCode(); if (responseCode == 200) { InputStream is = httpURLConnection.getInputStream(); bm = BitmapFactory.decodeStream(is); } } catch (IOException e) { e.printStackTrace(); } finally { if (httpURLConnection != null) { httpURLConnection.disconnect(); } } return bm; } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); img = (ImageView) findViewById(R.id.img); btn = (Button) findViewById(R.id.btn); btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { new Thread(new Runnable() { @Override public void run() { String URL = "http://img03.store.sogou.com/app/a/10010016/4b28ac2f2356c137fa4f3ff4b2d1c3db"; Bitmap bm = getInternetPicture(URL); Message msg = new Message(); msg.obj = bm; handler.sendMessage(msg); } }).start(); } }); } }
4.界面截图
