Android：不断更新的TextView的新值

Question

我是新来的Java和Android和我需要一些建议，我怎样才能更新位于XML中的Textview与通过我的代码生成的值。

程序在画布上绘制一条直线，我希望textView能够反映该线的尖端x值。

感谢您的帮助！

我的代码如下：

package com.example.threadexperiment1; 

import android.app.Activity; 
import android.content.Context; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.Paint; 
import android.os.Bundle; 
import android.view.View; 
import android.widget.RelativeLayout; 
import android.widget.TextView; 

public class MainActivity extends Activity { 

    lineDrawing InfiniteLine; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     InfiniteLine = new lineDrawing (this); 
     setContentView(R.layout.activity_main); 

     Thread thread = new Thread(InfiniteLine); 
     thread.start(); 

     RelativeLayout RL1 = (RelativeLayout)findViewById(R.id.RelativeLayout1); 
     RL1.addView(InfiniteLine); 

    } 
    public class lineDrawing extends View implements Runnable { 

     float x=100, y=100; 
     Paint lineColour = new Paint(); 
     TextView TV1 = (TextView)findViewById(R.id.textView1); 

     //Constructor 
     public lineDrawing(Context context) {        
      super(context); 
      lineColour.setColor(Color.BLACK); 
     } 

     //ondraw codes 
     @Override 
     public void onDraw (Canvas canvas){ 
      canvas.drawLine(0,0,x,y,lineColour); 

      if (x==500){ 
       x=0; 
       y=0; 
      } 

      invalidate(); 
     } 

     @Override 
     public void run() { 
      while (!Thread.currentThread().isInterrupted()) { 

      try { 
      Thread.sleep(250); 
       } 

      catch (Exception e) {} 
       x+=10; 
       y+=10; 
      } 

     } 

    } 

} 

Answer 1

内螺纹尝试textView.setText（串）。