ADD file via upload

network.java

@@ -0,0 +1,158 @@
+package com.example.health;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+import androidx.core.content.FileProvider;
+import android.Manifest;
+import android.annotation.SuppressLint;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.provider.MediaStore;
+import android.text.TextUtils;
+import android.view.View;
+import android.widget.EditText;
+import android.widget.ImageView;
+import android.widget.Toast;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+public class network extends AppCompatActivity {
+    protected static final int CHANGE_UI = 1;
+    protected static final int ERROR = 2;
+    private static final int REQUEST_CODE_TAKE = 1;
+    private Uri imageUri;
+    private ImageView ivPic;
+
+    @SuppressLint("HandlerLeak")
+    private Handler handler = new Handler(){
+        public void handleMessage(android.os.Message msg){
+            if (msg.what == CHANGE_UI){
+                Bitmap bitmap = (Bitmap) msg.obj;
+                ivPic.setImageBitmap(bitmap);
+            }
+            else if (msg.what == ERROR){
+                Toast.makeText(network.this,"显示图片错误",Toast.LENGTH_SHORT).show();
+            }
+        }
+    };
+
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_network);
+        ivPic = (ImageView) findViewById(R.id.iv_pic);
+    }
+
+    public  void click(View view){
+            new Thread(){
+                private HttpURLConnection conn;
+                private  Bitmap bitmap;
+                public void run(){
+                    try{
+                        URL url = new URL("https://picb2.photophoto.cn/40/293/40293462_1.jpg");
+                        conn = (HttpURLConnection) url.openConnection();
+                        conn.setRequestMethod("GET");
+                        conn.setConnectTimeout(5000);
+                        int code = conn.getResponseCode();
+                        if(code == 200){
+                            InputStream is = conn.getInputStream();
+                            bitmap = BitmapFactory.decodeStream(is);
+                            Message msg = new Message();
+                            msg.what = CHANGE_UI;
+                            msg.obj = bitmap;
+                            handler.sendMessage(msg);
+                        }
+                        else{
+                            Message msg = new Message();
+                            msg.what = ERROR;
+                            handler.sendMessage(msg);
+                        }
+
+                    }
+                    catch(Exception e){
+                        e.printStackTrace();
+                        Message msg = new Message();
+                        msg.what = ERROR;
+                        handler.sendMessage(msg);
+                    }
+                    conn.disconnect();
+                }
+            }.start();
+        }
+
+    public void takephoto(View view) {
+        if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED) {
+            // 真正的执行去拍照
+            doTake();
+        } else {
+            // 去申请权限
+            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.CAMERA}, 1);
+        }
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
+        if (requestCode == 1) {
+            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+                doTake();
+            } else {
+                Toast.makeText(this, "你没有获得摄像头权限~", Toast.LENGTH_SHORT).show();
+            }
+        }
+
+    }
+
+    private void doTake() {
+        File imageTemp = new File(getExternalCacheDir(), "imageOut.jpeg");
+        if (imageTemp.exists()) {
+            imageTemp.delete();
+        }
+        try {
+            imageTemp.createNewFile();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        if (Build.VERSION.SDK_INT > 24) {
+            // contentProvider
+            imageUri = FileProvider.getUriForFile(this, "com.example.health.fileprovider", imageTemp);
+        } else {
+            imageUri = Uri.fromFile(imageTemp);
+        }
+        Intent intent = new Intent();
+        intent.setAction("android.media.action.IMAGE_CAPTURE");
+        intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
+        startActivityForResult(intent, REQUEST_CODE_TAKE);
+
+    }
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+        if (requestCode == REQUEST_CODE_TAKE) {
+            if (resultCode == RESULT_OK) {
+                // 获取拍摄的照片
+                try {
+                    InputStream inputStream = getContentResolver().openInputStream(imageUri);
+                    Bitmap bitmap = BitmapFactory.decodeStream(inputStream);
+                    ivPic.setImageBitmap(bitmap);
+                } catch (FileNotFoundException e) {
+
+                }
+            }
+        }
+    }
+}