Question

我正在创建我的第一个应用程序，我不知道为什么，当我点击“新游戏”时，我收到通知“appka已停止”。另外我有疑问是我对sharedPreferences的增量是否正确？

spring-boot:stop

和.xml：

public class MainActivity extends ActionBarActivity {

TextView textView, textView2, solution;
int MyNumber, userNumber, guessCont;
SharedPreferences sharedPreferences;
SharedPreferences.Editor editor;



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

        textView = (TextView)findViewById(R.id.textView2);
        textView2 = (TextView)findViewById(R.id.textView3);
        solution = (TextView)findViewById(R.id.textView4);
        sharedPreferences = getSharedPreferences("com.example.lewan.appka", Context.MODE_PRIVATE);
        editor = sharedPreferences.edit();
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
        }

@Override
public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
    return true;
    }

    return super.onOptionsItemSelected(item);
    }

public void NewGame(View view){

    Random rand = new Random();
    MyNumber = rand.nextInt((5-0)+1)+0;
    guessCont =0;
    textView.setText("Time guessed: " + guessCont);
    solution.setText(MyNumber);
    }

public void guess(View view) {

    guessCont++;
    EditText editText =(EditText)findViewById(R.id.editText);
    userNumber = Integer.parseInt(editText.getText().toString());
    String message = "";
    if(userNumber!=MyNumber){
    message = "wrong number";
    }
    else if(userNumber==MyNumber){
    message = "correct number";
    int i=0;
    editor.putInt("Amount of games",i++);
    editor.commit();
    textView2.setText("Amount of games: " + sharedPreferences);
    }
    Context context = getApplicationContext();
    int duration = Toast.LENGTH_SHORT;

    Toast toast = Toast.makeText(context, message, duration);
    toast.show();
    toast.setGravity(Gravity.CENTER, 0, 0);
    textView.setText("Time guessed: " + guessCont);

    }
    }

bla bla bla，我的帖子主要是代码我需要更多bla bla

编辑：来自日志的错误

<EditText
    android:layout_width="120dp"
    android:layout_height="wrap_content"
    android:id="@+id/editText"
    android:layout_alignParentTop="true"
    android:layout_alignParentLeft="true"
    android:layout_alignParentStart="true"
    android:layout_marginTop="75dp"
    android:layout_marginLeft="50dp" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Guess!"
    android:id="@+id/button2"
    android:layout_alignBottom="@+id/editText"
    android:layout_toRightOf="@+id/editText"
    android:layout_toEndOf="@+id/editText"
    android:onClick="guess"/>

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="New Game"
    android:id="@+id/button3"
    android:layout_below="@+id/editText"
    android:layout_alignLeft="@+id/editText"
    android:layout_alignStart="@+id/editText"
    android:layout_alignRight="@+id/button2"
    android:layout_alignEnd="@+id/button2"
    android:onClick="NewGame"/>

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Time Guess"
    android:id="@+id/textView2"
    android:layout_below="@+id/button3"
    android:layout_alignLeft="@+id/button3"
    android:layout_alignStart="@+id/button3"
    android:layout_marginTop="32dp"
    android:textSize="20dp" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Amount of games"
    android:id="@+id/textView3"
    android:textSize="20dp"
    android:layout_centerVertical="true"
    android:layout_alignLeft="@+id/textView2"
    android:layout_alignStart="@+id/textView2" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:text="Solution (for testing)"
    android:id="@+id/textView4"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true" />

Answer 1

我认为改变代码

textView2.setText("Amount of games: " + sharedPreferences);

进入

textView2.setText("Amount of games: " + sharedPreferences.getString("Amount of games","");

Answer 2

你能改变吗？

基本上，您对Textview上设置的文本使用了 Integer 值，因此您必须使用 String 进行类型转换。

solution.setText(MyNumber);

到

solution.setText(""+MyNumber);

希望这会对你有所帮助。

我的简单应用程序已停止并在sharedPreferences中发出增量问题

2 个答案: