Question

你好我是Android工作室的新手，并希望你们其中一个人/女孩可以帮我解释为什么我的代码会让应用程序崩溃？代码用于简单的数学难题，您必须输入正确的数字才能得到答案。代码：

import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class Puzzle extends AppCompatActivity {


    //get the info
    EditText input01 = ( EditText ) findViewById ( R.id.input1 );
    EditText input02 = ( EditText ) findViewById ( R.id.input2 );
    EditText input03 = ( EditText ) findViewById ( R.id.input3 );
    EditText input04 = ( EditText ) findViewById ( R.id.input4 );
    EditText input05 = ( EditText ) findViewById ( R.id.input5 );
    EditText input06 = ( EditText ) findViewById ( R.id.input6 );
    EditText input07 = ( EditText ) findViewById ( R.id.input7 );
    EditText input08 = ( EditText ) findViewById ( R.id.input8 );
    EditText input09 = ( EditText ) findViewById ( R.id.input9 );

    //process data 
    int ans01 = Integer.valueOf ( input01.getText().toString() );
    int ans02 = Integer.valueOf ( input02.getText().toString() );
    int ans03 = Integer.valueOf ( input03.getText().toString() );
    int ans04 = Integer.valueOf ( input04.getText().toString() );
    int ans05 = Integer.valueOf ( input05.getText().toString() );
    int ans06 = Integer.valueOf ( input06.getText().toString() );
    int ans07 = Integer.valueOf ( input07.getText().toString() );
    int ans08 = Integer.valueOf ( input08.getText().toString() );
    int ans09 = Integer.valueOf ( input09.getText().toString() );

    //button creater
    Button check = ( Button ) findViewById(R.id.check);
    Button reset = ( Button ) findViewById(R.id.Reset);

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_puzzle);
        // ATTENTION: This was auto-generated to implement the App Indexing API.
        // See https://g.co/AppIndexing/AndroidStudio for more information.






        reset.setOnClickListener(
                new View.OnClickListener() {
                    @Override
                    public void onClick ( View view ) {

                        input01.setText ( "" );
                        input02.setText ( "" );
                        input03.setText ( "" );
                        input04.setText ( "" );
                        input05.setText ( "" );
                        input06.setText ( "" );
                        input07.setText ( "" );
                        input08.setText ( "" );
                        input09.setText ( "" );

                    }
                }
        );
// this is where the code starts crashing the app.
        check.setOnClickListener(
                new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {

                    // I want an if statement that checks the values of the inputed numbers
                     if ( ans01 + ans02 + ans03 = 14) {
                            input01.setTextColor(Color.GREEN);
                            input02.setTextColor(Color.RED);
                      }

                    }enter code here
                }
        );


    }

}

任何帮助将不胜感激。

Answer 1

1）在//创建onconate函数中的setcontentview语句后，将//获取info和//按钮创建器部分。

2）另外//进程数据部分应该在里面单击检查按钮。请在该部分包含另一项检查，以确保edittext内容为空以避免空崩溃。

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