質問編集履歴
2
ソースコードの追記
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@@ -15,73 +15,68 @@
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アプリを実行して画面を指でなぞってみても線が描けません。
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なぞっているのに、画面が飯能しないことについて、どんな原因が考えられるでしょうか・・？？
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↓MainActivity.java
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```java
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package com.example.paintview;
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import android.
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import android.os.Bundle;
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import android.support.design.widget.FloatingActionButton;
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import android.
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import android.support.design.widget.Snackbar;
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import android.
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import android.support.v7.app.AppCompatActivity;
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import android.graphics.Path;
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import android.
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import android.support.v7.widget.Toolbar;
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import android.view.MotionEvent;
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import android.view.View;
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import android.view.Menu;
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import android.view.MenuItem;
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public class
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public class MainActivity extends AppCompatActivity {
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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public PaintView(Context context) {
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this(context, null);
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}
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Toolbar toolbar = findViewById(R.id.toolbar);
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setSupportActionBar(toolbar);
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FloatingActionButton fab = findViewById(R.id.fab);
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fab.setOnClickListener(new View.OnClickListener() {
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@Override
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public void onClick(View view) {
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//Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG).setAction("Action", null).show();
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PaintView paintView = (PaintView)findViewById(R.id.view);
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paintView.clear();
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}
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paint.setStyle(Paint.Style.STROKE);
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paint.setStrokeJoin(Paint.Join.ROUND);
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paint.setStrokeCap(Paint.Cap.ROUND);
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});
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}
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@Override
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public boolean onCreateOptionsMenu(Menu menu) {
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// Inflate the menu; this adds items to the action bar if it is present.
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getMenuInflater().inflate(R.menu.menu_main, menu);
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return true;
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}
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@Override
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public boolean
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public boolean onOptionsItemSelected(MenuItem item) {
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// Handle action bar item clicks here. The action bar will
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// automatically handle clicks on the Home/Up button, so long
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// as you specify a parent activity in AndroidManifest.xml.
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int id = item.getItemId();
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float y = event.getY();
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//noinspection SimplifiableIfStatement
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if (id == R.id.action_settings) {
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case MotionEvent.ACTION_DOWN:
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path.moveTo(x, y);
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return true;
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break;
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case MotionEvent.ACTION_MOVE:
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path.lineTo(x, y);
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invalidate();
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break;
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case MotionEvent.ACTION_UP:
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path.lineTo(x, y);
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invalidate();
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break;
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}
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return true;
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}
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return super.onOptionsItemSelected(item);
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path.reset();
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invalidate();
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}
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}
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```
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↓PaintView.java
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```java
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package com.example.paintview;
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import android.content.Context;
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@@ -149,9 +144,9 @@
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}
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}
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```
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↓activity_main.xml
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```xml
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<?xml version="1.0" encoding="utf-8"?>
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<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
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@@ -190,6 +185,7 @@
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</android.support.design.widget.CoordinatorLayout>
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```
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↓content_main/xml
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```xml
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<?xml version="1.0" encoding="utf-8"?>
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<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
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1
ソースコードの追記
title
CHANGED
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File without changes
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body
CHANGED
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@@ -81,4 +81,133 @@
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81
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}
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```java
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package com.example.paintview;
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import android.content.Context;
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import android.graphics.Canvas;
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import android.graphics.Paint;
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import android.graphics.Path;
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import android.util.AttributeSet;
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import android.view.MotionEvent;
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import android.view.View;
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public class PaintView extends View {
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private Paint paint;
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private Path path;
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public PaintView(Context context) {
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this(context, null);
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}
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public PaintView(Context context, AttributeSet attrs) {
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super(context, attrs);
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path = new Path();
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paint = new Paint();
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paint.setColor(0xFF000000);
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paint.setStyle(Paint.Style.STROKE);
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paint.setStrokeJoin(Paint.Join.ROUND);
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paint.setStrokeCap(Paint.Cap.ROUND);
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paint.setStrokeWidth(10);
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}
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@Override
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protected void onDraw(Canvas canvas) {
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canvas.drawPath(path, paint);
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}
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@Override
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public boolean onTouchEvent(MotionEvent event) {
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float x = event.getX();
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float y = event.getY();
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switch (event.getAction()) {
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case MotionEvent.ACTION_DOWN:
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path.moveTo(x, y);
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invalidate();
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break;
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case MotionEvent.ACTION_MOVE:
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path.lineTo(x, y);
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invalidate();
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break;
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case MotionEvent.ACTION_UP:
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path.lineTo(x, y);
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invalidate();
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break;
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}
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return true;
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}
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public void clear(){
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path.reset();
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invalidate();
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}
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}
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```
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```xml
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<?xml version="1.0" encoding="utf-8"?>
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<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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tools:context=".MainActivity">
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<android.support.design.widget.AppBarLayout
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:theme="@style/AppTheme.AppBarOverlay">
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<android.support.v7.widget.Toolbar
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android:id="@+id/toolbar"
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android:layout_width="match_parent"
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android:layout_height="?attr/actionBarSize"
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android:background="?attr/colorPrimary"
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app:popupTheme="@style/AppTheme.PopupOverlay" />
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</android.support.design.widget.AppBarLayout>
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<include layout="@layout/content_main" />
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<android.support.design.widget.FloatingActionButton
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android:id="@+id/fab"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_gravity="bottom|end"
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android:layout_margin="@dimen/fab_margin"
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app:srcCompat="@android:drawable/ic_dialog_email" />
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</android.support.design.widget.CoordinatorLayout>
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```
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```xml
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<?xml version="1.0" encoding="utf-8"?>
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<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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app:layout_behavior="@string/appbar_scrolling_view_behavior"
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tools:context=".MainActivity"
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tools:showIn="@layout/activity_main">
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<view
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class="com.example.paintview.PaintView"
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id="@+id/view"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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tools:layout_editor_absoluteX="45dp"
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tools:layout_editor_absoluteY="421dp" />
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</android.support.constraint.ConstraintLayout>
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84
213
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```
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