本文例項為大家分享了Android實現長截圖功能的具體程式碼，供大家參考，具體內容如下

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);
    //許可權
    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,"正在請求許可權",Toast.LENGTH_SHORT).show();
      //申請許可權，特徵碼自定義為1，可在回撥時進行相關判斷
      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();
  }

  /**
   * 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();
      scrollView.getChildAt(i).setBackgroundColor(Color.parseColor("#ffffff"));
    }
    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) {
    }
    Log.d("TAG","getScrollViewBitmap() returned: " + bitmap.getHeight());
    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,"list 高度:" + listView.getHeight());
    // 建立對應大小的bitmap
    bitmap = Bitmap.createBitmap(listView.getWidth(),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,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);
    ScreenShot.saveMyBitmap(getScrollViewBitmap(scrollView,picpath);
  }

  // 程式入口 擷取ListView
  public static void shootListView(ListView listView,String picpath) {
    ScreenShot.savePic(getListViewBitmap(listView,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{
  // 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(b1,25,320,455);
    Bitmap b = Bitmap.createBitmap(b1,statusBarHeight,width,height
        - statusBarHeight);
    view.destroyDrawingCache();
    return b;
  }

  // 儲存到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();
    }
  }

  // 程式入口 擷取當前螢幕
  public static void shootLoacleView(Activity a,String picpath) {
    ScreenShot.savePic(ScreenShot.takeScreenShot(a),picpath);
  }

  /**
   * 儲存bitmap到SD卡
   * @param bitName 儲存的名字
   * @param mBitmap 圖片對像
   * return 生成壓縮圖片後的圖片路徑
   */
  @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("在儲存圖片時出錯：" + e.toString());
    }
    FileOutputStream fOut = null;
    try {
      fOut = new FileOutputStream(f);
    } catch (FileNotFoundException e) {
      e.printStackTrace();
    }
    try {
      mBitmap.compress(Bitmap.CompressFormat.PNG,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,out);
//      System.out.println("___________儲存的__sd___下_______________________");
//    } catch (FileNotFoundException e) {
//      e.printStackTrace();
//    }
//    try {
//      out.flush();
//      out.close();
//    } catch (IOException e) {
//      e.printStackTrace();
//    }
    return path;
  //  Toast.makeText(HahItemActivity.this,"儲存已經至"+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內容，希望對大家的學習有所幫助，也希望大家多多支援我們。