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トップに関する質問createScaledBitmapの行でNullPointerExceptionが出るのですが原因が分かりません

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質問編集履歴

5

コードの追記

2017/07/12 14:43

投稿

ko20vonobird
ko20vonobird

スコア50

test CHANGED
File without changes
test CHANGED
@@ -16,169 +16,79 @@
16
16
 
17
17
 
18
18
 
19
- ###該当のソースコード
19
+ ###該当のソースコード（追記）
20
+
21
+ ```xml
22
+
23
+ <?xml version="1.0" encoding="utf-8"?>
24
+
25
+ <FrameLayout
26
+
27
+ xmlns:android="http://schemas.android.com/apk/res/android"
28
+
29
+ android:layout_height="match_parent"
30
+
31
+ android:layout_width="match_parent">
32
+
33
+ <jpdb.shoichi_vono_kono.airchainsaw.C
34
+
35
+ android:id="@+id/display"
36
+
37
+ android:layout_width="match_parent"
38
+
39
+ android:layout_height="match_parent" />
40
+
41
+ </FrameLayout>
42
+
43
+ ```
44
+
45
+ 上はsurfaceViewを扱っているファイルを含むxmlファイルです。
46
+
47
+ Cがファイル名です。
20
48
 
21
49
  ```java
22
50
 
23
- try {
51
+ protected void onCreate(Bundle savedInstanceState) {
24
52
 
25
- /*
53
+ super.onCreate(savedInstanceState);
26
54
 
27
- ufo = Bitmap.createScaledBitmap(ufo, 150, 150, false);
55
+ Intent ii = getIntent();
28
56
 
29
- starmaemae = Bitmap.createScaledBitmap(starmaemae, (int) (starmaemaeoutw * 2.5f), (int) (starmaemaeouth * 2.5f), false);
57
+ BIngo = ii.getBooleanExtra("BINGOOO", false);
30
58
 
31
- starmae = Bitmap.createScaledBitmap(starmae, (int) (starmaeoutw * 2.5f), (int) (starmaeouth * 2.5f), false);
59
+ requestWindowFeature(Window.FEATURE_NO_TITLE);
32
60
 
33
- starushiro = Bitmap.createScaledBitmap(starushiro, (int) (starushioutw * 2.5f), (int) (starushiouth * 2.5f), false);
61
+ getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
34
62
 
35
- starushiroushiro = Bitmap.createScaledBitmap(starushiroushiro, (int) (starushiushioutw * 2.5f), (int) (starushiushiouth * 2.5f), false);
63
+ setNavigationbarHide(this, true);
36
64
 
37
- ya = Bitmap.createScaledBitmap(ya, 175, 175, false);*/
65
+ mSensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
38
66
 
39
- ufo = Bitmap.createScaledBitmap(ufo, 150, 150, false);
67
+ mProximity = mSensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY);
40
68
 
41
- starmaemae = Bitmap.createScaledBitmap(starmaemae, 3000, 3000, false);//ここでエラーが出ます。
69
+ mAccele = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
42
70
 
43
- starmae = Bitmap.createScaledBitmap(starmae, 3000, 3000, false);
71
+ LayoutInflater factory = LayoutInflater.from(this);
44
72
 
45
- starushiro = Bitmap.createScaledBitmap(starushiro, 3000, 3000, false);
73
+ FrameLayout root = new FrameLayout(this);
46
74
 
47
- starushiroushiro = Bitmap.createScaledBitmap(starushiroushiro, 3000, 3000, false);
75
+ View view = factory.inflate(R.layout.mix, root);
48
76
 
49
- ya = Bitmap.createScaledBitmap(ya, 175, 175, false);
77
+ setContentView(view);
50
78
 
51
- }catch (OutOfMemoryError e) {
79
+ cccc = (C) findViewById(R.id.display);
52
80
 
53
- Log.d("OutOfMemory", "happen");
81
+ String h1 = (String) getText(R.string.radar);
54
82
 
55
- }
83
+ cccc.setUr(h1);
56
84
 
57
- ```
58
-
59
- 上記が該当の箇所で、コメントアウトしているのは元々の記述を残すためです、というのも第二、第三引数が原因かと思ったからでした。しかし違うようです。
60
-
61
- 下記からは関連する記述になります。
62
-
63
- ```java
64
-
65
- DisplayMetrics metrics = new DisplayMetrics();
66
-
67
- windowManager.getDefaultDisplay().getMetrics(metrics);
68
-
69
- int _wDpi = (int)metrics.densityDpi;
70
-
71
- res = this.getContext().getResources();
72
-
73
- try {
74
-
75
- ufo = makeBitmap(_wDpi, res, R.drawable.ufocomp, getWidth(), getHeight());
76
-
77
- starmaemae = makeBitmap(_wDpi, res, R.drawable.starskymaemae, getWidth(), getHeight());
78
-
79
- starmae = makeBitmap(_wDpi, res, R.drawable.starskymae, getWidth(), getHeight());
80
-
81
- starushiro = makeBitmap(_wDpi, res, R.drawable.starskyushiro, getWidth(), getHeight());
82
-
83
- starushiroushiro = makeBitmap(_wDpi, res, R.drawable.starskyushiroushiro, getWidth(), getHeight());
84
-
85
- ya = makeBitmap(_wDpi, res, R.drawable.yajirushi, getWidth(), getHeight());
86
-
87
- }catch (OutOfMemoryError e) {
88
-
89
- Log.d("OutOfMemory", "happen");
90
-
91
- }
92
-
93
- ```
94
-
95
- 上は一番上のコードより上に記述してあります。
96
-
97
- 下は関連するメソッドです。
98
-
99
- ```java
100
-
101
- public Bitmap makeBitmap(int wDpi,Resources resources,int id,int MaxWidth,int MaxHeight){
102
-
103
- BitmapFactory.Options options = new BitmapFactory.Options();
104
-
105
- options.inJustDecodeBounds = true;
106
-
107
- BitmapFactory.decodeResource(resources, id, options);
108
-
109
- int _oDpi = options.inDensity;
110
-
111
- float scale = (float)_oDpi/wDpi;
112
-
113
- options.inJustDecodeBounds = false;
114
-
115
- /*if (id == R.drawable.ufocomp) {
116
-
117
- ufooutw = options.outWidth;
118
-
119
- ufoouth = options.outHeight;
120
-
121
- }else if (id == R.drawable.starskymaemae) {
122
-
123
- starmaemaeoutw = options.outWidth;
124
-
125
- starmaemaeouth = options.outHeight;
126
-
127
- }else if (id == R.drawable.starskymae) {
128
-
129
- starmaeoutw = options.outWidth;
130
-
131
- starmaeouth = options.outHeight;
132
-
133
- }else if (id == R.drawable.starskyushiro) {
134
-
135
- starushioutw = options.outWidth;
136
-
137
- starushiouth = options.outHeight;
138
-
139
- }else if (id == R.drawable.starskyushiroushiro) {
140
-
141
- starushiushioutw = options.outWidth;
142
-
143
- starushiushiouth = options.outHeight;
144
-
145
- }*/
146
-
147
- float max = Math.max((float)options.outWidth * scale / MaxWidth, (float)options.outHeight * scale / MaxHeight);
148
-
149
- max = (float) Math.floor(max);
150
-
151
- if(max > 1){
152
-
153
- options.inSampleSize = (int)max;
154
-
155
- Log.e("size", Float.toString(max));
156
-
157
- }else if(max < 1){
158
-
159
- Log.e("makeBitmap", "low Size");
160
-
161
- }
162
-
163
- //options.inPurgeable=true;
164
-
165
- Bitmap _bm = BitmapFactory.decodeResource(resources, id, options);
166
-
167
- Matrix matrix = new Matrix();
168
-
169
- matrix.postScale(scale*scale, scale*scale);
170
-
171
- Bitmap bmp = Bitmap.createBitmap(_bm, 0, 0, _bm.getWidth(), _bm.getHeight(), matrix, true);
172
-
173
- _bm.recycle();
85
+ cccc.setBINGo(BIngo);
174
-
175
- _bm = null;
176
-
177
- return bmp;
178
86
 
179
87
  }
180
88
 
181
89
  ```
90
+
91
+ 使用元のonCreateの部分です
182
92
 
183
93
 
184
94
 

4

追記の拡大

2017/07/12 14:43

投稿

ko20vonobird
ko20vonobird

スコア50

test CHANGED
File without changes
test CHANGED
@@ -252,4 +252,4 @@
252
252
 
253
253
  ###追記（各値）
254
254
 
255
- wDpi=480, MaxWidth=1080, MaxHeight=1920
255
+ wDpi=480, MaxWidth=1080, MaxHeight=1920, scale=0.33333334, max=0.0

3

各値の追記

2017/07/12 01:23

投稿

ko20vonobird
ko20vonobird

スコア50

test CHANGED
File without changes
test CHANGED
@@ -249,3 +249,7 @@
249
249
  ```
250
250
 
251
251
  呼び出し順は上の通り、makeBitmap()群が最初で次にBitmap.createScaledBitmap()群が呼ばれるようになっています。
252
+
253
+ ###追記（各値）
254
+
255
+ wDpi=480, MaxWidth=1080, MaxHeight=1920

2

追記

2017/07/11 15:50

投稿

ko20vonobird
ko20vonobird

スコア50

test CHANGED
File without changes
test CHANGED
@@ -8,43 +8,7 @@
8
8
 
9
9
  java.lang.NullPointerException: Attempt to invoke virtual method 'int android.graphics.Bitmap.getWidth()' on a null object reference
10
10
 
11
- at android.graphics.Bitmap.createScaledBitmap(Bitmap.java:610)
11
+
12
-
13
- at jpdb.shoichi_vono_kono.airchainsaw.C.surfaceCreated(C.java:265)
14
-
15
- at android.view.SurfaceView.updateWindow(SurfaceView.java:597)
16
-
17
- at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:179)
18
-
19
- at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:944)
20
-
21
- at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2059)
22
-
23
- at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1111)
24
-
25
- at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6017)
26
-
27
- at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
28
-
29
- at android.view.Choreographer.doCallbacks(Choreographer.java:670)
30
-
31
- at android.view.Choreographer.doFrame(Choreographer.java:606)
32
-
33
- at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
34
-
35
- at android.os.Handler.handleCallback(Handler.java:739)
36
-
37
- at android.os.Handler.dispatchMessage(Handler.java:95)
38
-
39
- at android.os.Looper.loop(Looper.java:234)
40
-
41
- at android.app.ActivityThread.main(ActivityThread.java:5524)
42
-
43
- at java.lang.reflect.Method.invoke(Native Method)
44
-
45
- at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
46
-
47
- at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
48
12
 
49
13
  ```
50
14
 
@@ -221,3 +185,67 @@
221
185
  ###試したこと
222
186
 
223
187
  引数を変数から数字に変えたりしてみました。
188
+
189
+
190
+
191
+ ###追記（関連するメソッドについて）
192
+
193
+ まず、関連するメソッドはmakeBitmap()とBitmap.createScaledBitmap()です。
194
+
195
+ ```java
196
+
197
+ DisplayMetrics metrics = new DisplayMetrics();
198
+
199
+ windowManager.getDefaultDisplay().getMetrics(metrics);
200
+
201
+ int _wDpi = (int)metrics.densityDpi;
202
+
203
+ res = this.getContext().getResources();
204
+
205
+
206
+
207
+ try {
208
+
209
+ ufo = makeBitmap(_wDpi, res, R.drawable.ufocomp, getWidth(), getHeight());
210
+
211
+ starmaemae = makeBitmap(_wDpi, res, R.drawable.starskymaemae, getWidth(), getHeight());
212
+
213
+ starmae = makeBitmap(_wDpi, res, R.drawable.starskymae, getWidth(), getHeight());
214
+
215
+ starushiro = makeBitmap(_wDpi, res, R.drawable.starskyushiro, getWidth(), getHeight());
216
+
217
+ starushiroushiro = makeBitmap(_wDpi, res, R.drawable.starskyushiroushiro, getWidth(), getHeight());
218
+
219
+ ya = makeBitmap(_wDpi, res, R.drawable.yajirushi, getWidth(), getHeight());
220
+
221
+ }catch (OutOfMemoryError e) {
222
+
223
+ Log.d("OutOfMemory", "happen");
224
+
225
+ }
226
+
227
+
228
+
229
+ try {
230
+
231
+ ufo = Bitmap.createScaledBitmap(ufo, 150, 150, false);
232
+
233
+ starmaemae = Bitmap.createScaledBitmap(starmaemae, (int) (starmaemaeoutw * 2.5f), (int) (starmaemaeouth * 2.5f), false);
234
+
235
+ starmae = Bitmap.createScaledBitmap(starmae, (int) (starmaeoutw * 2.5f), (int) (starmaeouth * 2.5f), false);
236
+
237
+ starushiro = Bitmap.createScaledBitmap(starushiro, (int) (starushioutw * 2.5f), (int) (starushiouth * 2.5f), false);
238
+
239
+ starushiroushiro = Bitmap.createScaledBitmap(starushiroushiro, (int) (starushiushioutw * 2.5f), (int) (starushiushiouth * 2.5f), false);
240
+
241
+ ya = Bitmap.createScaledBitmap(ya, 175, 175, false);
242
+
243
+ }catch (OutOfMemoryError e) {
244
+
245
+ Log.d("OutOfMemory", "happen");
246
+
247
+ }
248
+
249
+ ```
250
+
251
+ 呼び出し順は上の通り、makeBitmap()群が最初で次にBitmap.createScaledBitmap()群が呼ばれるようになっています。

1

説明追加

2017/07/11 03:42

投稿

ko20vonobird
ko20vonobird

スコア50

test CHANGED
File without changes
test CHANGED
@@ -128,6 +128,10 @@
128
128
 
129
129
  ```
130
130
 
131
+ 上は一番上のコードより上に記述してあります。
132
+
133
+ 下は関連するメソッドです。
134
+
131
135
  ```java
132
136
 
133
137
  public Bitmap makeBitmap(int wDpi,Resources resources,int id,int MaxWidth,int MaxHeight){