Java 无法获取按钮单击工作

我的java文件是

import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.view.View;

public class ThemesActivity extends AppCompatActivity{
SharedPreferences sharedPreferences;

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

@Override
protected void onStart() {
    super.onStart();
    setContentView(R.layout.activity_themes);
    sharedPreferences = getApplicationContext().
getSharedPreferences("MyNumbers", Context.MODE_PRIVATE);
    int bg = sharedPreferences.getInt("background_resource",
 R.color.backYellow);
    getWindow().setBackgroundDrawableResource(bg);
}

public void yellowClick(View view){
    sharedPreferences = getApplicationContext().
getSharedPreferences("MyNumbers", Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = sharedPreferences.edit();
    editor.putInt("background_resource", R.color.backYellow);
    editor.putInt("button_resource", R.color.buttonYellow);
    editor.apply();
    getWindow().setBackgroundDrawableResource(R.color.backYellow);
}

public void redClick(View view){
    sharedPreferences = getApplicationContext().
getSharedPreferences("MyNumbers", Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = sharedPreferences.edit();
    editor.putInt("background_resource", R.color.backRed);
    editor.putInt("button_resource", R.color.buttonRed);
    editor.apply();
    getWindow().setBackgroundDrawableResource(R.color.backRed);
}

public void blueClick(View view){
    sharedPreferences =      getApplicationContext().
 getSharedPreferences("MyNumbers", Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = sharedPreferences.edit();
    editor.putInt("background_resource", R.color.backBlue);
    editor.putInt("button_resource", R.color.buttonBlue);
    editor.apply();
    getWindow().setBackgroundDrawableResource(R.color.backBlue);
}

public void greenClick(View view){
    sharedPreferences = getApplicationContext().
 getSharedPreferences("MyNumbers", Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = sharedPreferences.edit();
    editor.putInt("background_resource", R.color.backGreen);
    editor.putInt("button_resource", R.color.buttonGreen);
    editor.apply();
    getWindow().setBackgroundDrawableResource(R.color.backGreen);
}

}

和资源文件作为

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/holo_orange_light"
android:gravity="center_horizontal"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.dhritiman.any.ThemesActivity">

<!-- Login progress -->


<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:id="@+id/linearLayout2">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:orientation="vertical"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin">

        <Button
            android:id="@+id/blueButton"
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:layout_weight="1"
            android:background="@android:color/holo_blue_dark"
            android:onClick="blueClick"
            android:text="Blue"
            android:visibility="visible" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:orientation="vertical"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin">

        <Button
            android:id="@+id/yellowButton"
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:layout_weight="1"
            android:background="@android:color/holo_orange_dark"
            android:onClick="yellowClick"
            android:text="Yellow"
            android:visibility="visible" />
    </LinearLayout>

</LinearLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:orientation="horizontal"
    android:layout_below="@+id/linearLayout2"
    android:layout_alignParentStart="true">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:orientation="vertical"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin">

        <Button
            android:id="@+id/redButton"
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:layout_weight="1"
            android:background="@android:color/holo_red_dark"
            android:contextClickable="false"
            android:linksClickable="false"
            android:onClick="redClick"
            android:text="Red"
            android:visibility="visible" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:orientation="vertical"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin">

        <Button
            android:id="@+id/greenButton"
            android:layout_width="match_parent"
            android:layout_height="100dp"
            android:layout_weight="1"
            android:background="@android:color/holo_green_dark"
            android:onClick="greenClick"
            android:text="Green"
            android:visibility="visible" />
    </LinearLayout>

</LinearLayout>

</RelativeLayout>

请帮助，我的logcat正在显示进程指针0和进程指针1 我的意思是，当点击按钮时，它只接受触摸输入，而不是点击按钮输入 我检查了所有的东西，但没有发现问题。

---

提前感谢

确保在创建活动时调用的

onCreate（）

中初始化视图和布局，当用户可以看到活动时调用

onStart（）

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_themes);
    // add here
    sharedPreferences = getApplicationContext().getSharedPreferences("MyNumbers", Context.MODE_PRIVATE);
    int bg = sharedPreferences.getInt("background_resource",R.color.backYellow);
    getWindow().setBackgroundDrawableResource(bg);
}

@Override
protected void onStart() {
    super.onStart();
    // move to onCreate
}

---

您的onclick可以很好地工作，只需在上面记录任何自定义消息，但您只需在onCreate中初始化setContentView（R.layout.activity_主题），因为您的代码现在也可以工作，但init all view组件应该在onCreate方法中初始化

---

谢谢

您没有对按钮本身的任何引用-您必须添加类似-

button btn=findviewbyd（R.id.your\u button\u name）的内容。你为什么使用
onStart（）
而不将所有代码放在
onCreate（）
？你的问题不是很清楚，但如果我没有听错，请删除
android:background=“@android:color/holo\u orange\u light”
来自布局XML中的
。您能告诉我初始化视图是什么意思吗？将布局文件放入
onCreate（）
中！