line ends and then use the code to draw the two dots, I want to implement such a function , like in between the two dots
Marquee realize the effect , but also want to achieve the Marquee effect in the form of dots and dots are painted with their own code . I ask how
achieve ah. Great God help answer the request ! ! ! !
------ Solution ---------------------------------------- ----
truth is the same ,
The second example, you draw a bright spot, unfinished, sent a delay Message, then over one second , Handler received the Message, adjust the position , calling invalidate (), triggering calls onDraw (). Then , draw two highlights. After adjustment of the position is above .
After
recall onDraw (), is re- drawn again , and the second in onDraw () in painting things will be erased .
So the effect of the above is that the second bright point , the next second highlight two points , the next second highlight three points . . .
------ eference --------------------------------------- < br> with TextView not on line yet , with the relative layout , draw a line , add a little above the text back and forth
------ eference ---------------- -----------------------
define a dot position : position,
define a Handler,
In onDraw () where , according to the position of the value circle dot , unfinished one , send a delay of the Message, the receiver in the Message Handler inside, and increase the value of position , and then call invalidate (), will trigger calls onDraw (). This time onDraw () in the value of the position is already increasing , and that point of time you draw a circle , the visual is a little dot moving forward .
delay value of their own grasp , smaller, faster moving dots , bigger , slower moving dots
------ eference ----------- ----------------------------
I did not make it clear that the above is not the marquee effect, say to , for example, reported that the light rail station map, when it ran between two stations when the stops are displayed in Fig.
dot the rolling kind of effect, a bright light first , then two lights, then three lights, is you want to achieve this effect , but also have my own dot painting . That is how to make switching from one point to several points between two points there.
------ eference ------------------------------------ ---
I asked some of the above problems , in fact, I do not want to achieve a point in the sports ticker , and I want to achieve the kind of results reported light rail station , is one of the highlights from between two to four stations highlights sequentially switched .
------ eference --------------------------------------- < br> do not know what your problem is solved yet , I have seen this example , you look ah
------ eference ------------------ ---------------------
package com.test;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Rect;
import android.os.Bundle;
import android.view.View;
public class DrawActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MyView mv = new MyView(this);
setContentView(mv);
}
public class MyView extends View {
private int p;
MyView(final Context context) {
super(context);
new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
while (true) {
if(p>500){
p=0;
}
p += 20;
try {
Thread.sleep(300);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Activity a = (Activity) context;
a.runOnUiThread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
MyView.this.invalidate();
}
});
}
}
}).start();
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
// 首先定义一个paint
Paint paint = new Paint();
// 绘制矩形区域-实心矩形
// 设置颜色
paint.setColor(Color.BLUE);
// 设置样式-填充
paint.setStyle(Style.FILL);
// 绘制一个矩形
canvas.drawRect(new Rect(0, 0, getWidth(), getHeight()), paint);
// 绘空心矩形
// 设置颜色
paint.setColor(Color.RED);
// 设置样式-空心矩形
paint.setStyle(Style.STROKE);
// 绘制一个矩形
canvas.drawRect(new Rect(10, 10, 100, 30), paint);
// 绘文字
// 设置颜色
paint.setColor(Color.GREEN);
// 绘文字
canvas.drawText("Hello", 10, 50, paint);
// 绘图
// 从资源文件中生成位图
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icon);
// 绘图
canvas.drawBitmap(bitmap, 10 + p, 60, paint);
}
}
}
------ eference ------------------------------------ ---
package com.test;or you want is this effect
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Rect;
import android.os.Bundle;
import android.view.View;
public class DrawActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MyView mv = new MyView(this);
setContentView(mv);
}
public class MyView extends View {
private int p;
private int bw, bh;
private Rect r;
MyView(final Context context) {
super(context);
new Thread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
while (true) {
if (p > 500) {
p = 0;
}
p += 60;
try {
Thread.sleep(300);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Activity a = (Activity) context;
a.runOnUiThread(new Runnable() {
@Override
public void run() {
// TODO Auto-generated method stub
MyView.this.invalidate(r);
}
});
}
}
}).start();
}
@Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
// 首先定义一个paint
Paint paint = new Paint();
// 绘制矩形区域-实心矩形
// 设置颜色
paint.setColor(Color.BLUE);
// 设置样式-填充
paint.setStyle(Style.FILL);
// 绘制一个矩形
canvas.drawRect(new Rect(0, 0, getWidth(), getHeight()), paint);
// 绘空心矩形
// 设置颜色
paint.setColor(Color.RED);
// 设置样式-空心矩形
paint.setStyle(Style.STROKE);
// 绘制一个矩形
canvas.drawRect(new Rect(10, 10, 100, 30), paint);
// 绘文字
// 设置颜色
paint.setColor(Color.GREEN);
// 绘文字
canvas.drawText("Hello", 10, 50, paint);
// 绘图
// 从资源文件中生成位图
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.icon);
// 绘图
bw = bitmap.getWidth();
bh = bitmap.getHeight();
r = new Rect(p + 60, 00, p + 60 + bw, 500);
canvas.drawBitmap(bitmap, p, 60, paint);
}
}
}
------ eference ----------------------- ----------------
Thank you very much ! ! !
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