轉換TextView的數量爲整數

Question

我試圖增加和減少數量，當我點擊「增加」和「減少」按鈕

我可以看到數以TextView的改變，但我需要使用的TextView的數量，使圖（我需要整數值）

我TRT使用

String value= display.getText().toString(); 
    int i = Integer.parseInt(value); 

，但它不工作

你們能幫助我如何做到從這個得到整數？

我的代碼是

public class MainActivity2 extends AppCompatActivity { 
int numtest; 
Button add, sub; 
TextView display; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main2); 

    numtest = 0; 

    add = (Button) findViewById(R.id.button2); 
    sub = (Button) findViewById(R.id.button3); 
    display = (TextView) findViewById(R.id.counter); 

    add.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      numtest = numtest + 1; 
      display.setText(numtest + ""); 
     } 
    }); 

    sub.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      if (numtest < 0){ 
       numtest = 0; 
       display.setText(numtest+ ""); 
      } 
      if (numtest > 0) { 
       numtest = numtest - 1; 
       display.setText(numtest+ ""); 
      } 
     } 
    }); 

    String value= display.getText().toString(); 
    int i = Integer.parseInt(value); 

這是我的全部代碼

public class MainActivity2 extends ActionBarActivity { 
int numtest; 
int numgraph; 
Button smoke_string, subtract_string; 
TextView display; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main2); 

    numtest = 0; 
    smoke_string = (Button) findViewById(R.id.button2); 
    subtract_string = (Button) findViewById(R.id.button3); 
    display = (TextView) findViewById(R.id.counter); 

    smoke_string.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      numtest = numtest + 1; 
      display.setText(numtest + ""); 
     } 
    }); 

    subtract_string.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      if (numtest > 0) { 
       numtest = numtest - 1; 
       display.setText(numtest + ""); 
      } 
      if (numtest < 0) { 
       numtest = 0; 
       display.setText(numtest + ""); 
      } 
     } 
    }); 



    String value= display.getText().toString(); 
    int i = Integer.parseInt(value); 



    Calendar calendar = Calendar.getInstance(); 
    Date d1 = calendar.getTime(); 
    calendar.add(Calendar.DATE, -1); 
    Date d2 = calendar.getTime(); 
    calendar.add(Calendar.DATE, -1); 
    Date d3 = calendar.getTime(); 

    GraphView graph = (GraphView) findViewById(R.id.graph); 


    LineGraphSeries<DataPoint> series = new LineGraphSeries<DataPoint>(new DataPoint[] { 
      new DataPoint(d1, 3), 
      new DataPoint(d2, 5), 
      new DataPoint(d3, i) 
    }); 
    graph.addSeries(series); 

    graph.getGridLabelRenderer().setLabelFormatter(new DateAsXAxisLabelFormatter(MainActivity2.this)); 
    graph.getGridLabelRenderer().setNumHorizontalLabels(3); // only 4 because of the space 

    graph.getViewport().setMinX(d1.getTime()); 
    graph.getViewport().setMaxX(d3.getTime()); 
    graph.getViewport().setXAxisBoundsManual(true); 

} 

}

Answer 1

你爲什麼要這樣這樣的說法，

你能做到這方式，

List<Integer> graph = new ArrayList<Integer>(); 

add.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      numtest = numtest + 1; 
      display.setText(numtest + ""); 
      graph.add(numtest); 
     } 
    }); 

    sub.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
      if (numtest < 0){ 
       numtest = 0; 
       display.setText(numtest+ ""); 

      } 
      if (numtest > 0) { 
       numtest = numtest - 1; 
       display.setText(numtest+ ""); 
      } 
      graph.add(numtest); 
     } 
    }); 

通過這種方式，您可以在添加按鈕和子按鈕上獲得每次點擊的數字值。

編輯：

嘗試這樣的事情，

 public class MainActivity2 extends ActionBarActivity { 

     int numtest; 
     int numgraph; 
     Button smoke_string, subtract_string; 
     TextView display; 
     GraphView graph; 

     LineGraphSeries<DataPoint> series = new LineGraphSeries<DataPoint>(); 

     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_main2); 

      numtest = 0; 
      smoke_string = (Button) findViewById(R.id.button2); 
      subtract_string = (Button) findViewById(R.id.button3); 
      display = (TextView) findViewById(R.id.counter); 
      graph = (GraphView) findViewById(R.id.graph); 

      smoke_string.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        Calendar calendar = Calendar.getInstance(); 
        Date d = calendar.getTime(); 
        numtest = numtest + 1; 
        display.setText(numtest + ""); 
        series.add(new DataPoint(d,numtest)); 
        redrawGraph(); 
       } 
      }); 

      subtract_string.setOnClickListener(new View.OnClickListener() { 
       @Override 
       public void onClick(View v) { 
        Calendar calendar = Calendar.getInstance(); 
        Date d = calendar.getTime(); 
        if (numtest > 0) { 
         numtest = numtest - 1; 
         display.setText(numtest + ""); 
        } 
        if (numtest < 0) { 
         numtest = 0; 
         display.setText(numtest + ""); 
        } 
        series.add(new DataPoint(d,numtest)); 
        redrawGraph(); 
       } 
      }); 

     } 

     private void redrawGraph(){ 
      graph.addSeries(series); 
      graph.getGridLabelRenderer().setLabelFormatter(new DateAsXAxisLabelFormatter(MainActivity2.this)); 
      graph.getGridLabelRenderer().setNumHorizontalLabels(3); // only 4 because of the space 

      Calendar calendar = Calendar.getInstance(); 

      calendar.add(Calendar.DATE, -1); 

      Date d1 = calendar.getTime();// Lower bound, This has to be dynamic 

      calendar.add(Calendar.DATE, 2);// Upper Bound 
      Date d3 = calendar.getTime(); 

      graph.getViewport().setMinX(d1.getTime()); 
      graph.getViewport().setMaxX(d3.getTime()); 
      graph.getViewport().setXAxisBoundsManual(true); 


     } 

    }