事件-编程知识

事件

1.按钮

现在默认是正常了，英文

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"android:padding="5dp"><TextViewandroid:layout_width="match_parent"android:layout_height="wrap_content"android:text="下面的按钮英文默认大写"android:textColor="@color/black"android:gravity="center"android:textSize="17sp"/><Buttonandroid:layout_width="match_parent"android:layout_height="wrap_content"android:text="Hello Word"/></LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"android:padding="5dp"><TextViewandroid:layout_width="match_parent"android:layout_height="wrap_content"android:text="下面的按钮英文默认大写"android:textColor="@color/black"android:gravity="center"android:textSize="17sp"/><TextViewandroid:id="@+id/tv_result"android:layout_width="match_parent"android:layout_height="wrap_content"android:text="点击按钮查看结果"android:textColor="@color/black"android:textSize="17sp"/><Buttonandroid:layout_width="match_parent"android:layout_height="wrap_content"android:textAllCaps="true"android:textColor="@color/black"android:textSize="17sp"android:text="Hello Word"/><Buttonandroid:layout_width="match_parent"android:layout_height="wrap_content"android:textAllCaps="true"android:textColor="@color/black"android:textSize="17sp"android:text="直接指定点击方法"android:onClick="doClick"/></LinearLayout>

package com.tiger.chapter03;import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;import java.util.Date;public class GridLayoutActivity extends AppCompatActivity {private TextView tv_result;@Overrideprotected void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_scroll_view);tv_result = findViewById(R.id.tv_result);}public void doClick(View view){Button button = (Button) view;tv_result.setText(button.getText()+"点击了按钮:"+new Date().toString());}
}