Dynamische Markierung "auf" einem Image

1<activity android:name=".ShowPosition"
2 android:screenOrientation="landscape"
3 android:theme="@style/Theme.Transparent"></activity>

1<?xml version="1.0" encoding="utf-8"?>
2<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3 android:layout_width="fill_parent"
4 android:layout_height="fill_parent"
5 android:orientation="vertical" >
6
7 <Button
8 android:id="@+id/map"
9 android:layout_width="wrap_content"
10 android:layout_height="wrap_content"
11 android:text="Beenden" />
12
13 <ImageView
14 android:id="@+id/my_image"
15 android:layout_width="fill_parent"
16 android:layout_height="fill_parent" />
17</LinearLayout>

1Intent showPosition = new Intent(MainActivity.this, ShowPosition.class);
2 startActivity(showPosition);

1<?xml version="1.0" encoding="utf-8"?>
2<resources>
3 <style name="Theme.Transparent" parent="android:Theme">
4 <item name="android:windowIsTranslucent">true</item>
5 <item name="android:windowBackground">@android:color/transparent</item>
6 <item name="android:windowContentOverlay">@null</item>
7 <item name="android:windowNoTitle">true</item>
8 <item name="android:windowIsFloating">true</item>
9 <item name="android:backgroundDimEnabled">false</item>
10 </style>
11</resources>

1package com.example.mapapplication;
2
3import android.app.Activity;
4import android.content.Context;
5import android.content.Intent;
6import android.graphics.Bitmap;
7import android.graphics.BitmapFactory;
8import android.graphics.Canvas;
9import android.graphics.Color;
10import android.graphics.Paint;
11import android.graphics.PointF;
12import android.os.Bundle;
13import android.os.Environment;
14import android.util.Log;
15import android.view.MotionEvent;
16import android.view.View;
17
18public class ShowPosition extends Activity {
19 @Override
20 protected void onCreate(Bundle savedInstanceState) {
21 super.onCreate(savedInstanceState);
22 setContentView(new SampleView(this));
23
24 }
25 private class SampleView extends View {
26
27 private boolean isDrawing;
28 private PointF endPoint;
29 private Paint p;
30
31 public SampleView(Context context) {
32 super(context);
33 setFocusable(true); initalize();
34 }
35
36 private void initalize(){
37 p = new Paint();
38 p.setAntiAlias(true);
39 p.setColor(Color.RED);
40 p.setStyle(Paint.Style.STROKE);
41 p.setStrokeWidth(4.5f);
42 p.setAntiAlias(true);
43 }
44
45 @Override
46 protected void onDraw(Canvas canvas) {
47
48 if(isDrawing)
49 canvas.drawCircle(endPoint.x, endPoint.y, 50, p);
50 }
51
52
53 public boolean onTouchEvent(MotionEvent event) {
54
55 switch (event.getAction())
56 {
57 case MotionEvent.ACTION_DOWN:
58 endPoint = new PointF();
59 isDrawing = true;
60 break;
61
62 case MotionEvent.ACTION_MOVE:
63 if(isDrawing)
64 {
65 endPoint.x = event.getX();
66 endPoint.y = event.getY();
67 invalidate();
68 break;
69 }
70
71 case MotionEvent.ACTION_UP:
72 if(isDrawing)
73 {
74 endPoint.x = event.getX();
75 endPoint.y = event.getY();
76 invalidate();
77 isDrawing = false;
78 break;
79 }
80 }
81 return true;
82 }
83 }
84}

1this.requestWindowFeature(Window.FEATURE_NO_TITLE);
2 this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
3 WindowManager.LayoutParams.FLAG_FULLSCREEN);
4
5 SampleView sampleView = new SampleView(this);
6 setContentView(sampleView);

1package com.example.canvas;
2
3import android.app.Activity;
4import android.content.Context;
5import android.graphics.Bitmap;
6import android.graphics.BitmapFactory;
7import android.graphics.Canvas;
8import android.graphics.Color;
9import android.graphics.Paint;
10import android.graphics.PointF;
11import android.graphics.drawable.Drawable;
12import android.os.Bundle;
13import android.os.Environment;
14import android.view.MotionEvent;
15import android.view.View;
16import android.view.Window;
17import android.view.WindowManager;
18
19public class MainActivity extends Activity {
20 /** Called when the activity is first created. */
21 @Override
22 public void onCreate(Bundle savedInstanceState) {
23 super.onCreate(savedInstanceState);
24
25 this.requestWindowFeature(Window.FEATURE_NO_TITLE);
26 this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
27 WindowManager.LayoutParams.FLAG_FULLSCREEN);
28
29 myView test = new myView(this);
30 setContentView(test);
31 }
32
33 private class myView extends View{
34
35 private boolean isDrawing;
36 private PointF endPoint;
37 private boolean backgroundSet;
38
39
40
41public myView(Context context) {
42 super(context);
43
44 }
45
46@Override
47protected void onDraw(Canvas canvas) {
48
49 // if(!backgroundSet)
50 background(canvas);
51
52 Paint myPaint = new Paint();
53 myPaint.setColor(Color.RED);
54 myPaint.setStyle(Paint.Style.STROKE);
55 myPaint.setStrokeWidth(3);
56
57
58 if(isDrawing)
59 canvas.drawCircle(endPoint.x, endPoint.y, 50, myPaint);
60 }
61
62private boolean background(Canvas canvas){
63
64 String imagePath = Environment.getExternalStorageDirectory().toString()+"/Android/data/com.example.broadcast/files/test.png";
65 BitmapFactory.Options options;
66 options = new BitmapFactory.Options();
67 options.inSampleSize=1;
68 Bitmap bitmap = BitmapFactory.decodeFile(imagePath, options);
69 canvas.drawBitmap(bitmap, 0, 0, null);
70
71 backgroundSet=true;
72 return backgroundSet;
73}
74
75public boolean onTouchEvent(MotionEvent event) {
76
77 switch (event.getAction())
78 {
79 case MotionEvent.ACTION_DOWN:
80 endPoint = new PointF();
81 isDrawing = true;
82 invalidate();
83 break;
84
85 case MotionEvent.ACTION_MOVE:
86 if(isDrawing)
87 {
88 endPoint.x = event.getX();
89 endPoint.y = event.getY();
90 invalidate();
91 break;
92 }
93
94 case MotionEvent.ACTION_UP:
95 if(isDrawing)
96 {
97 endPoint.x = event.getX();
98 endPoint.y = event.getY();
99 isDrawing = false;
100 break;
101 }
102 }
103return true;
104}
105 }
106}

1String imagePath = Environment.getExternalStorageDirectory().toString()+"/Android/data/com.example.broadcast/files/test.png";
2 BitmapFactory.Options options;
3 options = new BitmapFactory.Options();
4 options.inSampleSize=1;
5 Bitmap bitmap = BitmapFactory.decodeFile(imagePath, options);
6 Bitmap resizedBitmap = Bitmap.createScaledBitmap(bitmap, sx, sy, false);
7 canvas.drawBitmap(resizedBitmap, 0, 0, null);

1Display display = getWindowManager().getDefaultDisplay();
2 Point size = new Point();
3 display.getSize(size);
4 sx= size.x;
5 sy= size.y;

1canvas.drawColor(Color.TRANSPARENT);

1int breite = bitmap.getWidth();
2 int höhe = bitmap.getHeight();
3
4 faktorX = sx/breite;
5 faktorY = sy/höhe;
6
7 if(faktorX>=faktorY){
8 sx= breite*faktorY;
9 sy= höhe*faktorY;
10 }
11 else{
12 sx= breite*faktorX;
13 sy= höhe*faktorX;
14 }
15
16
17 Log.d("BITMAP", "Breite/Höhe Bitmap: "+breite+ " "+ höhe+" Breite/Höhe resized: "+sx+" "+sy+" Faktor: " + faktorX+" "+faktorY);

103-29 10:18:08.127: D/BITMAP(5773): Breite/Höhe Bitmap: 940 485 Breite/Höhe resized: 1880 970 Faktor: 2 2