无法让按钮点击工作

Question

我有我的 java 文件

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);
}

}

和资源文件一样，

<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>

请帮忙，我的 logcat 显示进程指针 0 和进程指针 1 我的意思是当按钮被点击时它只接受触摸输入而不是按钮点击输入 我已经检查了所有内容，但无法找到问题所在。 提前致谢

Answer 1

确保在创建活动时调用onCreate() 中初始化视图和布局，当活动对用户可见时调用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
}

Answer 2

您的 onclick 将正常工作，只需在其上记录任何客户消息，但您只需在 onCreate 内初始化您的 setContentView(R.layout.activity_themes)，因为您的代码现在也可以工作，但初始化所有视图组件应在 onCreate 方法内初始化

谢谢！