截圖與截長圖功能的實現
阿新 • • 發佈:2018-12-26
Demo在GitHub的地址:
https://github.com/Hebin320/ScreenShoot
Demo在CSDN上的下載地址:
http://download.csdn.net/detail/hebin320320/9721970
在Android開發中,有時候會遇到需要截圖分享到朋友圈或者QQ,截圖有擷取當前螢幕,也有需要擷取不僅一個螢幕,可能會很長。
擷取當前螢幕並儲存到記憶體卡的方法:
// 獲取指定Activity的截圖,儲存到png檔案
public static Bitmap takeScreenShot(Activity activity) {
// View是你需要截圖的View
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap b1 = view.getDrawingCache();
// 獲取狀態列高度
Rect frame = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
int statusBarHeight = frame.top;
System.out.println(statusBarHeight);
// 獲取螢幕長和高
int width = activity.getWindowManager().getDefaultDisplay().getWidth();
int height = activity.getWindowManager().getDefaultDisplay()
.getHeight();
// 去掉標題欄
// Bitmap b = Bitmap.createBitmap(b1, 0, 25, 320, 455);
Bitmap b = Bitmap.createBitmap(b1, 0, statusBarHeight, width, height
- statusBarHeight);
view.destroyDrawingCache();
return b;
}
// 儲存到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();
}
}
// 程式入口 擷取當前螢幕
public static void shootLoacleView(Activity a,String picpath) {
ScreenShot.savePic(ScreenShot.takeScreenShot(a), picpath);
}
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當檢視超過一個螢幕的時候,可能是listview,也可能是Scrollview,這時候,其實截圖就是對listview或者Scrollview進行截圖:
/**
* 擷取scrollview的螢幕
* **/
public static Bitmap getScrollViewBitmap(ScrollView scrollView,String picpath) {
int h = 0;
Bitmap bitmap;
// 獲取listView實際高度
for (int i = 0; i < scrollView.getChildCount(); i++) {
h += scrollView.getChildAt(i).getHeight();
}
Log.d(TAG, "實際高度:" + h);
Log.d(TAG, " 高度:" + scrollView.getHeight());
// 建立對應大小的bitmap
bitmap = Bitmap.createBitmap(scrollView.getWidth(), h,
Bitmap.Config.ARGB_8888);
final Canvas canvas = new Canvas(bitmap);
scrollView.draw(canvas);
// 測試輸出
FileOutputStream out = null;
try {
out = new FileOutputStream(picpath);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
try {
if (null != out) {
bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
out.flush();
out.close();
}
} catch (IOException e) {
}
return bitmap;
}
private static String TAG = "Listview and ScrollView item 截圖:";
/**
* 截圖listview
* **/
public static Bitmap getListViewBitmap(ListView listView,String picpath) {
int h = 0;
Bitmap bitmap;
// 獲取listView實際高度
for (int i = 0; i < listView.getChildCount(); i++) {
h += listView.getChildAt(i).getHeight();
}
Log.d(TAG, "實際高度:" + h);
Log.d(TAG, "list 高度:" + listView.getHeight());
// 建立對應大小的bitmap
bitmap = Bitmap.createBitmap(listView.getWidth(), h,
Bitmap.Config.ARGB_8888);
final Canvas canvas = new Canvas(bitmap);
listView.draw(canvas);
// 測試輸出
FileOutputStream out = null;
try {
out = new FileOutputStream(picpath);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
try {
if (null != out) {
bitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
out.flush();
out.close();
}
} catch (IOException e) {
}
return bitmap;
}
// 程式入口 擷取ScrollView
public static void shootScrollView(ScrollView scrollView,String picpath) {
ScreenShot.savePic(getScrollViewBitmap(scrollView, picpath), picpath);
}
// 程式入口 擷取ListView
public static void shootListView(ListView listView,String picpath) {
ScreenShot.savePic(getListViewBitmap(listView,picpath), picpath);
}
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截長圖的效果圖: