packagecom.example.linechardemo;
importandroid.app.Activity;
importandroid.content.Context;
importandroid.graphics.Canvas;
importandroid.graphics.Color;
importandroid.graphics.Paint;
importandroid.os.Bundle;
importandroid.view.View;
importandroid.widget.FrameLayout;
importandroid.widget.HorizontalScrollView;
importjava.util.Random;
public classMainActivityextendsActivity {
@Override
protected voidonCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FrameLayout frameLayout = (FrameLayout) findViewById(R.id.frame);
frameLayout.addView(newMyView2(this));
HorizontalScrollView scrollView = (HorizontalScrollView) findViewById(R.id.scrollview);
scrollView.addView(newMyView(this));
}
//y轴
classMyView2extendsView {
publicMyView2(Context context) {
super(context);
}
@Override
protected voidonDraw(Canvas canvas) {
super.onDraw(canvas);
Paint paint =newPaint();
paint.setColor(Color.RED);
paint.setStyle(Paint.Style.STROKE);
paint.setAntiAlias(true);
paint.setStrokeWidth(5);
canvas.drawLine(10,0,10, getHeight() /2, paint);
}
}
//x轴
classMyViewextendsView {
private intqujian;
publicMyView(Context context) {
super(context);
}
@Override
protected voidonMeasure(intwidthMeasureSpec,intheightMeasureSpec) {
qujian= (MeasureSpec.getSize(widthMeasureSpec) -jianju*2) /currentSize;
setMeasuredDimension(qujian*size+jianju*2, MeasureSpec.getSize(heightMeasureSpec));
}
intcurrentSize=6;
intsize=11;
intjianju=50;
@Override
protected voidonDraw(Canvas canvas) {
super.onDraw(canvas);
canvas.drawColor(Color.BLACK);
Paint paint =newPaint();
paint.setColor(Color.RED);
paint.setStyle(Paint.Style.STROKE);
paint.setAntiAlias(true);
paint.setStrokeWidth(5);
canvas.drawLine(0, getHeight() /2,qujian*size+jianju, getHeight() /2, paint);
intmax = getHeight() /2;
intmin =100;
int[] points =new int[11];
for(inti =0; i <11; i++) {
intcurrentX =jianju+qujian* (1+ i);
canvas.drawLine(currentX, getHeight() /2, currentX, getHeight() /2-10, paint);
Random random =newRandom();
intr = random.nextInt(max) % (max - min +1) + min;
canvas.drawCircle(currentX, r,5, paint);
points[i] = r;
}
for(inti =0; i < points.length; i++) {
intcurrentX =jianju+qujian* (1+ i);
intnextX =jianju+qujian* (2+ i);
if(i !=10)
canvas.drawLine(currentX, points[i], nextX, points[i +1], paint);
}
}
}
}
<xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal"
tools:context="com.example.linechardemo.MainActivity">
android:id="@+id/frame"
android:layout_width="5dp"
android:layout_height="400dp"/>
android:id="@+id/scrollview"
android:layout_width="0dp"
android:layout_height="400dp"
android:scrollbars="none"
android:overScrollMode="never"
android:layout_weight="1"
android:background="#fff"/>
现实原理：
x轴放入水平滚动的HorizontalScrollView，即可。
