Question

我将Scrollview放入Android SignatureView。
但是在Scrollview上写一些内容时，上下滚动我无法写下我的标志。

触摸SignatureView时如何禁用<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" > <ScrollView android:id="@+id/scrollView1" android:layout_width="match_parent" android:layout_height="wrap_content" android:isScrollContainer="false" android:paddingBottom="30dp" android:paddingLeft="2dp" android:paddingRight="2dp" android:scrollbars="none"> <LinearLayout android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical"> <com.kyanogen.signatureview.SignatureView xmlns:sign="http://schemas.android.com/apk/res-auto" android:id="@+id/signature_view" android:layout_width="match_parent" android:layout_height="100dp" android:minHeight="250dp" android:layout_weight="1" sign:penSize="5dp" sign:backgroundColor="#ffffff" sign:penColor="#000000" sign:enableSignature="true"/> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:weightSum="2"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/clearSignButton" android:layout_weight="1" android:text="clear"/> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/saveSignButton" android:layout_weight="1" android:text="save"/> </LinearLayout> </LinearLayout> </LinearLayout> </Scrolview>

Link to referred signature

Sign.xml

package com.example.parsaniahardik.signaturedemo;

import android.graphics.Bitmap;
import android.media.MediaScannerConnection;
import android.os.Environment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;

import com.kyanogen.signatureview.SignatureView;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Calendar;

public class MainActivity extends AppCompatActivity {

    Bitmap bitmap;
    Button clear,save;
    SignatureView signatureView;
    String path;
    private static final String IMAGE_DIRECTORY = "/signdemo";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        signatureView =  (SignatureView) findViewById(R.id.signature_view);
        clear = (Button) findViewById(R.id.clear);
        save = (Button) findViewById(R.id.save);

        clear.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                signatureView.clearCanvas();
            }
        });

        save.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                bitmap = signatureView.getSignatureBitmap();
                path = saveImage(bitmap);
            }
        });


    }
    public String saveImage(Bitmap myBitmap) {
        ByteArrayOutputStream bytes = new ByteArrayOutputStream();
        myBitmap.compress(Bitmap.CompressFormat.JPEG, 90, bytes);
        File wallpaperDirectory = new File(
                Environment.getExternalStorageDirectory() + IMAGE_DIRECTORY /*iDyme folder*/);
        // have the object build the directory structure, if needed.
        if (!wallpaperDirectory.exists()) {
            wallpaperDirectory.mkdirs();
            Log.d("hhhhh",wallpaperDirectory.toString());
        }

        try {
            File f = new File(wallpaperDirectory, Calendar.getInstance()
                    .getTimeInMillis() + ".jpg");
            f.createNewFile();
            FileOutputStream fo = new FileOutputStream(f);
            fo.write(bytes.toByteArray());
            MediaScannerConnection.scanFile(MainActivity.this,
                    new String[]{f.getPath()},
                    new String[]{"image/jpeg"}, null);
            fo.close();
            Log.d("TAG", "File Saved::--->" + f.getAbsolutePath());

            return f.getAbsolutePath();
        } catch (IOException e1) {
            e1.printStackTrace();
        }
        return "";

    }
}

Main.java

{{1}}

Answer 1

当您想要签名时，您需要在触摸签名时拦截滚动事件。当您在签名区域之外时，请返回正常状态： scrollView截取滚动事件。在控制器中的onCreate内添加以下内容：

signatureView.setOnTouchListener(new View.OnTouchListener(){
        @Override
        public boolean onTouch(View view, MotionEvent motionEvent) {
            int action = motionEvent.getAction();
            switch (action){
                case MotionEvent.ACTION_DOWN:
                    // Disable the scroll view to intercept the touch event
                    scrollView1.requestDisallowInterceptTouchEvent(true);
                    return false;
                case MotionEvent.ACTION_UP:
                    // Allow scroll View to interceot the touch event
                    scrollView1.requestDisallowInterceptTouchEvent(false);
                    return true;
                case MotionEvent.ACTION_MOVE:
                    scrollView1.requestDisallowInterceptTouchEvent(true);
                    return false;
                default:
                    return true;
            }
        }
    });

Answer 2

您必须拦截此SignatureView中的触摸事件。最好的方法是将其子类化并覆盖onTouchEvent：

public class MySignatureView extends SignatureView {
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        // intercept touch event here, so it's not passed to ScrollView
        super.onTouchEvent(event);
        return false;
    }
}

然后，当然，在您的布局中将SignatureView更改为MySignatureView。

<com.your.package.name.MySignatureView
        xmlns:sign="http://schemas.android.com/apk/res-auto"
        android:id="@+id/signature_view"
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:minHeight="250dp"
        android:layout_weight="1"
        sign:penSize="5dp"
        sign:backgroundColor="#ffffff"
        sign:penColor="#000000"
        sign:enableSignature="true"/>

内部Scrollview SignatureView无法正常工作

2 个答案: