本文实例为大家分享了Android实现长截屏功能的具体代码，供大家参考，具体内容如下

1、MainActivity

public class MainActivity extends AppCompatActivity { ScrollView scrollView; String sdRoot = Environment.getExternalStorageDirectory().getPath(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); scrollView = (ScrollView) findViewById(R.id.scroll); //权限 int permission_write= ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE); int permission_read=ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE); if(permission_write!= PackageManager.PERMISSION_GRANTED || permission_read!=PackageManager.PERMISSION_GRANTED){ Toast.makeText(this, "正在请求权限", Toast.LENGTH_SHORT).show(); //申请权限，特征码自定义为1，可在回调时进行相关判断 ActivityCompat.requestPermissions(this,new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE,Manifest.permission.READ_EXTERNAL_STORAGE},1); } } @Override public void onWindowFocusChanged(boolean hasFocus) { shootScrollView(scrollView, "sdRoot");// takeScreenshot(); super.onWindowFocusChanged(hasFocus); } @Override protected void onResume() { super.onResume(); } /** * 截取scrollview的屏幕 * **/ public static Bitmap getScrollViewBitmap(ScrollView scrollView, String picpath) { int h = 0; Bitmap bitmap; // 获取listView实际高度 for (int i = 0; i < scrollView.getChildCount(); i++) { h += scrollView.getChildAt(i).getHeight(); scrollView.getChildAt(i).setBackgroundColor(Color.parseColor("#ffffff")); } 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(picpath); } catch (FileNotFoundException e) { e.printStackTrace(); } try { if (null != out) { bitmap.compress(Bitmap.CompressFormat.PNG, 100, out); out.flush(); out.close(); } } catch (IOException e) { } Log.d("TAG", "getScrollViewBitmap() returned: " + bitmap.getHeight()); return bitmap; } private static String TAG = "Listview and ScrollView item 截图:"; /** * 截图listview * **/ public static Bitmap getListViewBitmap(ListView listView, String picpath) { int h = 0; Bitmap bitmap; // 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(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; } // 程序入口 截取ScrollView public static void shootScrollView(ScrollView scrollView, String picpath) {// ScreenShot.savePic(getScrollViewBitmap(scrollView, picpath), picpath); ScreenShot.saveMyBitmap(getScrollViewBitmap(scrollView, picpath), picpath); } // 程序入口 截取ListView public static void shootListView(ListView listView, String picpath) { ScreenShot.savePic(getListViewBitmap(listView,picpath), picpath); } private void takeScreenshot() { Date now = new Date(); android.text.format.DateFormat.format("yyyy-MM-dd_hh:mm:ss", now); try { // image naming and path to include sd card appending name you choose for file String mPath = Environment.getExternalStorageDirectory().toString() + "/" + now + ".jpg"; // create bitmap screen capture View v1 = getWindow().getDecorView().getRootView(); v1.setDrawingCacheEnabled(true); Bitmap bitmap = Bitmap.createBitmap(v1.getDrawingCache()); v1.setDrawingCacheEnabled(false); File imageFile = new File(mPath); FileOutputStream outputStream = new FileOutputStream(imageFile); int quality = 100; bitmap.compress(Bitmap.CompressFormat.JPEG, quality, outputStream); outputStream.flush(); outputStream.close(); openScreenshot(imageFile); } catch (Throwable e) { // Several error may come out with file handling or OOM e.printStackTrace(); } } private void openScreenshot(File imageFile) { Intent intent = new Intent(); intent.setAction(Intent.ACTION_VIEW); Uri uri = Uri.fromFile(imageFile); intent.setDataAndType(uri, "image/*"); startActivity(intent); }}

2.ScreenShot

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(); return b; } // 保存到sdcard public static void savePic(Bitmap b, String strFileName) { FileOutputStream fos = null; Log.d("TAG", "savePic() returned: " ); try { fos = new FileOutputStream(strFileName); if (null != fos) { b.compress(Bitmap.CompressFormat.PNG, 90, fos); Log.d("TAG", "savePic() returned: " + b.getHeight()); fos.flush(); fos.close(); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } // 程序入口 截取当前屏幕 public static void shootLoacleView(Activity a, String picpath) { ScreenShot.savePic(ScreenShot.takeScreenShot(a), picpath); } /** * 保存bitmap到SD卡 * @param bitName 保存的名字 * @param mBitmap 图片对像 * return 生成压缩图片后的图片路径 */ @SuppressLint("SdCardPath") public static String saveMyBitmap(Bitmap mBitmap, String bitName) { String path = Environment.getExternalStorageDirectory()+"/"+bitName+".png"; File f = new File(path); try { f.createNewFile(); } catch (IOException e) { System.out.println("在保存图片时出错：" + e.toString()); } FileOutputStream fOut = null; try { fOut = new FileOutputStream(f); } catch (FileNotFoundException e) { e.printStackTrace(); } try { mBitmap.compress(Bitmap.CompressFormat.PNG, 100, fOut); } catch (Exception e) { return "create_bitmap_error"; } try { fOut.flush(); } catch (IOException e) { e.printStackTrace(); } try { fOut.close(); } catch (IOException e) { e.printStackTrace(); }// File file = new File(Environment.getExternalStorageDirectory(), System.currentTimeMillis()+".jpg");// FileOutputStream out = null;// try {// out = new FileOutputStream(file);// mBitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);// System.out.println("___________保存的__sd___下_______________________");// } catch (FileNotFoundException e) {// e.printStackTrace();// }// try {// out.flush();// out.close();// } catch (IOException e) {// e.printStackTrace();// } return path; // Toast.makeText(HahItemActivity.this,"保存已经至"+Environment.getExternalStorageDirectory()+"下", Toast.LENGTH_SHORT).show(); }}

3.xml

<?xml version="1.0" encoding="utf-8"?><ScrollView xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/scroll" tools:context=".MainActivity"> <LinearLayout android:orientation="vertical" android:layout_width="match_parent" android:layout_height="wrap_content"> </LinearLayout></ScrollView>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。