在TextView中的顯示乘法表

Question

我想要生成一個乘法表，其中第一個EditText取實際數字，而第二個EditText取乘法表的實際範圍。當我運行該項目時，結果只有編號*範圍.. 任何人都可以幫助我在下面提到的循環或代碼或者，GridLayout或TableLayout而不是TextView顯示錶中的任何替代方法。

protected void onCreate(Bundle savedInstanceState) 
{ 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_multiplication_table); 
    number = (EditText)findViewById(R.id.numberTable); 
    range = (EditText)findViewById(R.id.numberRange); 
    click = (Button)findViewById(R.id.click); 
    result = (TextView)findViewById(R.id.display); 
    final String x = range.getText().toString(); 
    click.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View view) { 
      int a = Integer.parseInt(number.getText().toString()); 
      int b = Integer.parseInt(range.getText().toString()); 



      for(int i = 1 ; i <= 10; i++) 
      { 
       for(int j = 1 ; j <= 10; j++) 
       { 
        int res = a * b; 
          result. setText(a +" * " + b + " = " + res); 

       } 





      } 
      return; 
     } 
    }); 

} 
} 

Answer 1

要爲每一行調用setText()，但setText()將重置TextView的文本，您可能需要使用append()代替

result.setText(""); 
int a = Integer.parseInt(number.getText().toString()); 
int b = Integer.parseInt(range.getText().toString()); 

for(int i = 1 ; i <= b; i++){  
    int res = a * i; 
    result.append(a +" * " + i + " = " + res + "\n");  
} 

或可能使用StringBuilder

int a = Integer.parseInt(number.getText().toString()); 
int b = Integer.parseInt(range.getText().toString()); 
StringBuilder builder = new StringBuilder(); 

for(int i = 1 ; i <= b; i++){  
    int res = a * i; 
    builder.append(a +" * " + i + " = " + res + "\n");  
} 

result.setText(builder.toString())