Merge pull request #2329 from WJKAAA/master

#5 实验五+报告

soft1614080902135/app/src/main/AndroidManifest.xml

@@ -19,7 +19,8 @@
         <activity
             android:name=".Soft1614080902135Activity2"
             android:label="@string/title_activity_soft16140809021352"
-            android:theme="@style/AppTheme.NoActionBar"></activity>
+            android:theme="@style/AppTheme.NoActionBar" />
+        <activity android:name=".Soft1614080902135Activity3" />
     </application>
 
 </manifest>

soft1614080902135/app/src/main/java/com/example/wjk/edu.hzuapps.androidlabs.soft1614080902135/Soft1614080902135Activity.java

@@ -0,0 +1,28 @@
+package com.example.wjk.edu.hzuapps.androidlabs.soft1614080902135;
+
+import android.content.Intent;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
+
+public class Soft1614080902135Activity extends AppCompatActivity {
+
+    private Button newButton;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_soft1614080902135);
+
+        newButton=(Button)findViewById(R.id.button_1);
+        newButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent intent=new Intent(Soft1614080902135Activity.this,Soft1614080902135Activity2.class);
+                startActivity(intent);
+            }
+        });
+
+    }
+}

soft1614080902135/app/src/main/java/com/example/wjk/edu.hzuapps.androidlabs.soft1614080902135/Soft1614080902135Activity2.java

@@ -0,0 +1,122 @@
+package com.example.wjk.edu.hzuapps.androidlabs.soft1614080902135;
+
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Matrix;
+import android.graphics.Paint;
+import android.net.Uri;
+import android.os.Environment;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.view.MotionEvent;
+import android.view.View;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.Toast;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.OutputStream;
+
+
+public class Soft1614080902135Activity2 extends AppCompatActivity {
+    private ImageView iv;
+    private Bitmap baseBitmap;
+    private Canvas canvas;
+    private Paint paint;
+    private Button newButton1;
+    private Button newButton2;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_soft16140809021352);
+
+
+        newButton2 = (Button) findViewById(R.id.button_2);
+        newButton2.setOnClickListener(new View.OnClickListener() {
+            public void onClick(View v) {
+                Intent intent1=new Intent(Soft1614080902135Activity2.this,Soft1614080902135Activity3.class);
+                startActivity(intent1);
+            }
+        });
+
+
+        newButton1 = (Button) findViewById(R.id.button_3);
+        newButton1.setOnClickListener(new View.OnClickListener() {
+            public void onClick(View v) {
+                save();
+            }
+        });
+
+
+
+        this.iv = (ImageView) this.findViewById(R.id.iv);
+        // 创建一张空白图片
+        baseBitmap = Bitmap.createBitmap(1200, 1600, Bitmap.Config.ARGB_8888);
+        // 创建一张画布
+        canvas = new Canvas(baseBitmap);
+        // 画布背景为白色
+        canvas.drawColor(Color.WHITE);
+        // 创建画笔
+        paint = new Paint();
+        // 画笔颜色为黑色
+        paint.setColor(Color.BLACK);
+        // 宽度5个像素
+        paint.setStrokeWidth(10);
+        // 先将白色背景画上
+        canvas.drawBitmap(baseBitmap, new Matrix(), paint);
+        iv.setImageBitmap(baseBitmap);
+
+        iv.setOnTouchListener(new View.OnTouchListener() {
+            int startX;
+            int startY;
+
+            @Override
+            public boolean onTouch(View v, MotionEvent event) {
+                switch (event.getAction()) {
+                    case MotionEvent.ACTION_DOWN:
+                        // 获取手按下时的坐标
+                        startX = (int) event.getX();
+                        startY = (int) event.getY();
+                        break;
+                    case MotionEvent.ACTION_MOVE:
+                        // 获取手移动后的坐标
+                        int stopX = (int) event.getX();
+                        int stopY = (int) event.getY();
+                        // 在开始和结束坐标间画一条线
+                        canvas.drawLine(startX, startY, stopX, stopY, paint);
+                        // 实时更新开始坐标
+                        startX = (int) event.getX();
+                        startY = (int) event.getY();
+                        iv.setImageBitmap(baseBitmap);
+                        break;
+                }
+                return true;
+            }
+        });
+    }
+
+    public void save() {
+        try {
+            File file = new File(Environment.getExternalStorageDirectory(),
+                    System.currentTimeMillis() + ".jpg");
+            OutputStream stream = new FileOutputStream(file);
+            baseBitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
+            stream.close();
+            Intent intent = new Intent();
+            intent.setAction(Intent.ACTION_MEDIA_MOUNTED);
+            intent.setData(Uri.fromFile(Environment
+                    .getExternalStorageDirectory()));
+            sendBroadcast(intent);
+        } catch (Exception e) {
+            Toast.makeText(Soft1614080902135Activity2.this, "保存图片成功", Toast.LENGTH_SHORT).show();
+
+            e.printStackTrace();
+        }
+    }
+}
+

soft1614080902135/app/src/main/java/com/example/wjk/edu.hzuapps.androidlabs.soft1614080902135/Soft1614080902135Activity3.java

@@ -0,0 +1,97 @@
+package com.example.wjk.edu.hzuapps.androidlabs.soft1614080902135;
+
+import android.os.Bundle;
+import android.support.design.widget.FloatingActionButton;
+import android.support.design.widget.Snackbar;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+import android.view.View;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.MalformedURLException;
+import java.net.URL;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.os.Bundle;
+import android.os.Environment;
+import android.os.Handler;
+import android.os.Message;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.ImageView;
+
+public class Soft1614080902135Activity3 extends AppCompatActivity {
+    private EditText editText;
+    private Button button;
+    private ImageView imageView;
+    private Bitmap bitmap;
+
+    Handler h;
+
+    {
+        h= new Handler() {
+            public void handleMessage(Message msg) {
+                if (msg.what == 111) {
+                    imageView.setImageBitmap(bitmap);
+                }
+            }
+
+            ;
+        };
+    }
+
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_soft16140809021353);
+        editText = (EditText) findViewById(R.id.imagepath);
+        button = (Button) findViewById(R.id.upload);
+        imageView = (ImageView) findViewById(R.id.imageView);
+        button.setOnClickListener(new OnClickListener() {
+            public void onClick(View arg0) {
+                new Thread(t).start();
+            }
+        });
+    }
+
+    //为了下载图片资源，开辟一个新的子线程
+    Thread t=new Thread(){
+        public void run() {
+            //下载图片的路径
+            String iPath=editText.getText().toString();
+            try {
+                //对资源链接
+                URL url=new URL(iPath);
+                //打开输入流
+                InputStream inputStream=url.openStream();
+                //对网上资源进行下载转换位图图片
+                bitmap=BitmapFactory.decodeStream(inputStream);
+                h.sendEmptyMessage(111);
+                inputStream.close();
+
+                //再一次打开
+                inputStream=url.openStream();
+                File file=new File(Environment.getExternalStorageDirectory()+"/DCIM/");
+                FileOutputStream fileOutputStream=new FileOutputStream(file);
+                int hasRead=0;
+                while((hasRead=inputStream.read())!=-1){
+                    fileOutputStream.write(hasRead);
+                }
+                fileOutputStream.close();
+                inputStream.close();
+            } catch (MalformedURLException e) {
+                e.printStackTrace();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        };
+    };
+
+
+}