Android编程之截屏实现方法(包括scrollview与listview)

时间:2022-03-14 14:48:38

本文实例讲述了Android编程之截屏实现方法。分享给大家供大家参考,具体如下:

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
public class ScreenShot {
 // 获取指定Activity的截屏,保存到png文件
 public static Bitmap takeScreenShot(Activity activity) {
  // View是你需要截图的View
  View view = activity.getWindow().getDecorView();
  view.setDrawingCacheEnabled(true);
  view.buildDrawingCache();
  Bitmap b1 = view.getDrawingCache();
  // 获取状态栏高度
  Rect frame = new Rect();
  activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
  int statusBarHeight = frame.top;
  System.out.println(statusBarHeight);
  // 获取屏幕长和高
  int width = activity.getWindowManager().getDefaultDisplay().getWidth();
  int height = activity.getWindowManager().getDefaultDisplay()
    .getHeight();
  // 去掉标题栏
  // Bitmap b = Bitmap.createBitmap(b1, 0, 25, 320, 455);
  Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height
    - statusBarHeight);
  view.destroyDrawingCache();
  savePic(b, "/sdcard/screen_test.png");
  return b;
 }
 // 保存到sdcard
 public static void savePic(Bitmap b, String strFileName) {
  FileOutputStream fos = null;
  try {
   fos = new FileOutputStream(strFileName);
   if (null != fos) {
    b.compress(Bitmap.CompressFormat.PNG, 90, fos);
    fos.flush();
    fos.close();
   }
  } catch (FileNotFoundException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  }
 }
 /**
  * 把View对象转换成bitmap
  * */
 public static Bitmap convertViewToBitmap(View view) {
  view.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),
    MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
  view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
  view.buildDrawingCache();
  Bitmap bitmap = view.getDrawingCache();
  if (bitmap != null) {
   System.out.println("这不是nullde1");
   Log.d("nullde1", "nullde1");
  } else {
   System.out.println("这nullnulllnulnlul");
  }
  return bitmap;
 }
 // 程序入口1
 public static void shoot(Activity a) {
  ScreenShot.savePic(ScreenShot.takeScreenShot(a), "/sdcard/screen_test.png");
 }
 // 程序入口2
 public static void shootView(View view) {
  ScreenShot.savePic(ScreenShot.convertViewToBitmap(view),
    "sdcard/xx.png");
 }
 public static Bitmap getViewBitmap(View v) {
  v.clearFocus();
  v.setPressed(false);
  boolean willNotCache = v.willNotCacheDrawing();
  v.setWillNotCacheDrawing(false);
  // Reset the drawing cache background color to fully transparent
  // for the duration of this operation
  int color = v.getDrawingCacheBackgroundColor();
  v.setDrawingCacheBackgroundColor(0);
  if (color != 0) {
   v.destroyDrawingCache();
  }
  v.buildDrawingCache();
  Bitmap cacheBitmap = v.getDrawingCache();
  if (cacheBitmap == null) {
   Log.e("TTTTTTTTActivity", "failed getViewBitmap(" + v + ")",
     new RuntimeException());
   return null;
  }
  Bitmap bitmap = Bitmap.createBitmap(cacheBitmap);
  // Restore the view
  v.destroyDrawingCache();
  v.setWillNotCacheDrawing(willNotCache);
  v.setDrawingCacheBackgroundColor(color);
  return bitmap;
 }
 /**
  * 截取scrollview的屏幕
  * **/
 public static Bitmap getBitmapByView(ScrollView scrollView) {
  int h = 0;
  Bitmap bitmap = null;
  // 获取listView实际高度
  for (int i = 0; i < scrollView.getChildCount(); i++) {
   h += scrollView.getChildAt(i).getHeight();
   scrollView.getChildAt(i).setBackgroundResource(R.drawable.bg3);
  }
  Log.d(TAG, "实际高度:" + h);
  Log.d(TAG, " 高度:" + scrollView.getHeight());
  // 创建对应大小的bitmap
  bitmap = Bitmap.createBitmap(scrollView.getWidth(), h,
    Bitmap.Config.ARGB_8888);
  final Canvas canvas = new Canvas(bitmap);
  scrollView.draw(canvas);
  // 测试输出
  FileOutputStream out = null;
  try {
   out = new FileOutputStream("/sdcard/screen_test.png");
  } catch (FileNotFoundException e) {
   e.printStackTrace();
  }
  try {
   if (null != out) {
    bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
    out.flush();
    out.close();
   }
  } catch (IOException e) {
   // TODO: handle exception
  }
  return bitmap;
 }
 private static String TAG = "Listview and ScrollView item 截图:";
 /**
  * 截图listview
  * **/
 public static Bitmap getbBitmap(ListView listView) {
  int h = 0;
  Bitmap bitmap = null;
  // 获取listView实际高度
  for (int i = 0; i < listView.getChildCount(); i++) {
   h += listView.getChildAt(i).getHeight();
  }
  Log.d(TAG, "实际高度:" + h);
  Log.d(TAG, "list 高度:" + listView.getHeight());
  // 创建对应大小的bitmap
  bitmap = Bitmap.createBitmap(listView.getWidth(), h,
    Bitmap.Config.ARGB_8888);
  final Canvas canvas = new Canvas(bitmap);
  listView.draw(canvas);
  // 测试输出
  FileOutputStream out = null;
  try {
   out = new FileOutputStream("/sdcard/screen_test.png");
  } catch (FileNotFoundException e) {
   e.printStackTrace();
  }
  try {
   if (null != out) {
    bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
    out.flush();
    out.close();
   }
  } catch (IOException e) {
   // TODO: handle exception
  }
  return bitmap;
 }
}

希望本文所述对大家Android程序设计有所帮助。