Android：按钮对点击没有反应

时间：2020-01-21 22:41:55

标签： java android android-studio

我正在为数据收集应用程序创建一堆加号和减号按钮。我正在使用状态机。

当我按下应用程序中的按钮时，显示数字的TextView应该会更改，但不会更改。我做错了什么？

这是相关代码：

package com.example.scoutingapp3250;

import android.content.Intent;
import android.icu.lang.UCharacter;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.ScrollView;
import android.widget.TextView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.Toolbar;

import 
com.google.android.material.floatingactionbutton.FloatingActionButton;
import com.google.zxing.client.android.Intents;


public class MainActivity extends AppCompatActivity implements View.OnClickListener {

public static String finalOutput;
public static StringBuilder stringBuilder;

public enum ScanState {
    scanning,
    empty,
    stopped
}

ScanState scanState;

@Override
protected void onCreate(Bundle savedInstanceState) {
    stringBuilder = new StringBuilder();
    super.onCreate(savedInstanceState);
    super.onResume();
    findViewById(R.id.minusButtonAutoPowerPortBottom).setOnClickListener(this);
    findViewById(R.id.plusButtonAutoPowerPortBottom).setOnClickListener(this);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    Button submit = findViewById(R.id.submit);
    submit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            checkForms();
            //if (checkForms();return;void)
            openActivity2();
        }
    });
}

public void checkForms() {
    scanState = ScanState.scanning;
    ScrollView scrollView = findViewById(R.id.scroll);
    LinearLayout linearLayout = findViewById(R.id.linearLayout);
    final int childCount = linearLayout.getChildCount();
    for (int i = 0; i < childCount; i++) {
        View element = linearLayout.getChildAt(i);
        switch (scanState) {
            case scanning:
                if (element instanceof EditText) {
                    EditText editText = (EditText) element;
                    if (editText.getText().toString().matches("")) {
                        scrollView.scrollTo(0, editText.getTop() + 10);
                        scanState = ScanState.empty;
                        break;
                    }
                    break;
                }

                if (element instanceof RadioGroup) {
                    RadioGroup radioGroup = (RadioGroup) element;
                    RadioButton radioButton = findViewById(radioGroup.getCheckedRadioButtonId());
                    if (radioGroup.getCheckedRadioButtonId() == -1) {
                        scrollView.scrollTo(0, radioGroup.getTop());
                        scanState = ScanState.empty;
                        break;
                    }

                }
                scanState = ScanState.stopped;
                break;
            case empty:
                break;
            case stopped:
                break;
        }

    }
}

public void openActivity2() {
    output();
    Intent intent = new Intent(MainActivity.this, QrCodeGenerator.class);
    intent.putExtra("data", stringBuilder.toString());
    startActivity(intent);
}

public void openPitScout() {
    Intent pitScout = new Intent (MainActivity.this, PitScouter.class);
    startActivity(pitScout);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    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.pitScoutSheet) {
        openPitScout();
        return true;
    }

    return super.onOptionsItemSelected(item);

}

private void addInt(int stateID) {
    TextView tView = findViewById(stateID);
    int value = Integer.parseInt(tView.getText().toString());
    value += 1;
    String temp = Integer.toString(value); tView.setText(temp);
    //tView.setText(Integer.toString(value));
}

private void subInt(int stateID) {
    TextView tView = findViewById(stateID);
    int value = Integer.parseInt(tView.getText().toString());
    value -= 1;
    String temp = Integer.toString(value); tView.setText(temp);
    //tView.setText(Integer.toString(value));
}

    public void output () {
        EditText scoutName = findViewById(R.id.editSN);
        TextView teamNumber = findViewById(R.id.editTN);
        EditText matchNumber = findViewById(R.id.editMatchNumber);
        RadioGroup alliance = findViewById(R.id.alliance);
        RadioButton allianceI = findViewById(alliance.getCheckedRadioButtonId());
        RadioGroup driverStation = findViewById(R.id.driverStation);
        RadioButton driverStationI = findViewById(driverStation.getCheckedRadioButtonId());
        RadioGroup crossLine = findViewById(R.id.crossLine);
        RadioButton crossLineI = findViewById(crossLine.getCheckedRadioButtonId());
        TextView autoPowerPortBottom = findViewById(R.id.autoPowerPortBottomDisplay);
        TextView autoPowerPortOuter = findViewById(R.id.autoPowerPortOuterDisplay);
        TextView autoDroppedPowerCells = findViewById(R.id.autoDroppedPowerCellsDisplay);
        RadioGroup autoConflict = findViewById(R.id.autoConflict);
        RadioButton autoConflictS = findViewById(autoConflict.getCheckedRadioButtonId());
        TextView powerPortBottom = findViewById(R.id.powerPortBottomDisplay);
        TextView powerPortOuter = findViewById(R.id.powerPortOuterDisplay);
        TextView droppedPowerCells = findViewById(R.id.droppedPowerCellsDisplay);
        RadioGroup rotationControl = findViewById(R.id.rotationControlGroup);
        RadioButton rotationControlI = findViewById(rotationControl.getCheckedRadioButtonId());
        RadioGroup stageReached = findViewById(R.id.stageReachedGroup);
        RadioButton stageReachedI = findViewById(stageReached.getCheckedRadioButtonId());
        CheckBox boxTrench = findViewById(R.id.boxTrench);
        CheckBox boxCenter = findViewById(R.id.boxCenter);
        CheckBox boxOnTheirSide = findViewById(R.id.boxOnTheirSide);
        RadioGroup climb = findViewById(R.id.climb);
        RadioButton climbS = findViewById(climb.getCheckedRadioButtonId());
        RadioGroup multiClimb = findViewById(R.id.multiClimb);
        RadioButton multiClimbS = findViewById(multiClimb.getCheckedRadioButtonId());
        RadioGroup driverSkill = findViewById(R.id.driverSkill);
        RadioButton driverSkillI = findViewById(driverSkill.getCheckedRadioButtonId());
        RadioGroup focusOnDefense = findViewById(R.id.groupFocusOnDefense);
        RadioButton focusOnDefenseI = findViewById(focusOnDefense.getCheckedRadioButtonId());
        TextView beached = findViewById(R.id.beachedDisplay);
        TextView disabled = findViewById(R.id.disabledDisplay);
        TextView died = findViewById(R.id.diedDisplay);
        TextView fouls = findViewById(R.id.foulDisplay);
        TextView techFouls = findViewById(R.id.techFoulDisplay);
        EditText notes = findViewById(R.id.editNotes);

        String[] outputString = new String[]{
                scoutName.getText().toString(),
                teamNumber.getText().toString(),
                matchNumber.getText().toString(),
                allianceI.getText().toString(),
                driverStationI.getText().toString(),
                crossLineI.getText().toString(),
                autoPowerPortBottom.getText().toString(),
                autoPowerPortOuter.getText().toString(),
                autoDroppedPowerCells.getText().toString(),
                autoConflictS.getText().toString(),
                powerPortBottom.getText().toString(),
                powerPortOuter.getText().toString(),
                droppedPowerCells.getText().toString(),
                rotationControlI.getText().toString(),
                stageReachedI.getText().toString(),
                boxTrench.getText().toString(),
                boxCenter.getText().toString(),
                boxOnTheirSide.getText().toString(),
                climbS.getText().toString(),
                multiClimbS.getText().toString(),
                driverSkillI.getText().toString(),
                focusOnDefenseI.getText().toString(),
                beached.getText().toString(),
                disabled.getText().toString(),
                died.getText().toString(),
                fouls.getText().toString(),
                techFouls.getText().toString(),
                notes.getText().toString()
        };

        for (int i = 0; i < outputString.length; i++) {
            stringBuilder.append(outputString[i]);
            stringBuilder.append(", ");
        }
    }
@Override
public void onClick(View v) {
    switch (v.getId()) {

        case R.id.minusButtonAutoPowerPortBottom:
            subInt(R.id.autoPowerPortBottomDisplay);
            break;
        case R.id.plusButtonAutoPowerPortBottom:
            addInt(R.id.autoPowerPortBottomDisplay);
            break;

        case R.id.minusButtonAutoPowerPortOuter:
            subInt(R.id.autoPowerPortOuterDisplay);
            break;
        case R.id.plusButtonAutoPowerPortOuter:
            addInt(R.id.autoPowerPortOuterDisplay);
            break;

        case R.id.minusAutoDroppedPowerCells:
            subInt(R.id.autoDroppedPowerCellsDisplay);
            break;
        case R.id.plusAutoDroppedPowerCells:
            addInt(R.id.autoDroppedPowerCellsDisplay);
            break;

        case R.id.minusPowerPortBottom:
            subInt(R.id.powerPortBottomDisplay);
            break;
        case R.id.plusPowerPortBottom:
            addInt(R.id.powerPortBottomDisplay);
            break;

        case R.id.minusPowerPortOuter:
            subInt(R.id.powerPortOuterDisplay);
            break;
        case R.id.plusPowerPortOuter:
            addInt(R.id.powerPortOuterDisplay);
            break;

        case R.id.minusDroppedPowerCells:
            subInt(R.id.droppedPowerCellsDisplay);
            break;
        case R.id.plusDroppedPowerCells:
            addInt(R.id.droppedPowerCellsDisplay);
            break;

        case R.id.minusBeached:
            subInt(R.id.beachedDisplay);
            break;
        case R.id.plusBeached:
            addInt(R.id.beachedDisplay);
            break;

        case R.id.minusDisabled:
            subInt(R.id.disabledDisplay);
            break;
        case R.id.plusDisabled:
            addInt(R.id.disabledDisplay);
            break;

        case R.id.minusDied:
            subInt(R.id.minusDied);
            break;
        case R.id.plusDied:
            addInt(R.id.plusDied);
            break;

        case R.id.minusFouls:
            subInt(R.id.foulDisplay);
            break;
        case R.id.plusFoul:
            addInt(R.id.foulDisplay);
            break;

        case R.id.minusTechFoul:
            subInt(R.id.techFoulDisplay);
            break;
        case R.id.plusTechFoul:
            addInt(R.id.techFoulDisplay);
            break;

        default:
            break;
    }
}

针对每个不同的功能重复XML（即bottoPowerPort与广告死亡计数）

<TextView
            android:id="@+id/viewAutoPowerPortBottom"
            android:layout_height="wrap_content"
            android:layout_width="wrap_content"
            android:text="@string/autoPowerPortBottom"
            android:textAppearance="@style/textColor"
            android:textSize="24sp"/>
        <Button
            android:id="@+id/minusButtonAutoPowerPortBottom"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="-"/>
        <TextView
            android:id="@+id/autoPowerPortBottomDisplay"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/zero"
            android:textAppearance="@style/textColor"
            android:textSize="30sp"
            android:layout_marginTop="10dp"/>
        <Button
            android:id="@+id/plusButtonAutoPowerPortBottom"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="+"/>

        <TextView
            android:id="@+id/viewAutoPowerPortOuter"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/autoPowerPortOuter"
            android:textAppearance="@style/textColor"
            android:textSize="24sp"/>

        <Button
            android:id="@+id/minusButtonAutoPowerPortOuter"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="-"/>
        <TextView
            android:id="@+id/autoPowerPortOuterDisplay"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/zero"
            android:textAppearance="@style/textColor"
            android:textSize="30sp"
            android:layout_marginTop="10dp"/>
        <Button
            android:id="@+id/plusButtonAutoPowerPortOuter"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="+"/>

        <TextView
            android:id="@+id/viewAutoDroppedPowerCells"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/autoDroppedPowerCells"
            android:textAppearance="@style/textColor"
            android:textSize="30sp"/>

        <Button
            android:id="@+id/minusAutoDroppedPowerCells"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="-"/>
        <TextView
            android:id="@+id/autoDroppedPowerCellsDisplay"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/zero"
            android:textAppearance="@style/textColor"
            android:textSize="30sp"
            android:layout_marginTop="10dp"/>
        <Button
            android:id="@+id/plusAutoDroppedPowerCells"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="+"/>

1 个答案:

答案 0 :(得分：0)

据您的回复和评论所知，您做错了一点。 不会自动为布局树中的每个Widget调用 onClick() 方法。

您所做的是对您的活动实施 View.OnClickListener 。 因此，基本上，您应该告诉所有单击的按钮/视图，以使用已实施的 onClick() 方法。在您的情况下，您需要在 onCreate() 方法中进行以下操作：

findViewById(R.id.minusButtonAutoPowerPortBottom).setOnClickListener(this);
findViewById(R.id.plusButtonAutoPowerPortBottom).setOnClickListener(this);
...
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