1 <LinearLayout android:layout_width="fill_parent"
2 android:layout_height="fill_parent"
3 android:orientation="vertical"
4 xmlns:android="http://schemas.android.com/apk/res/android" >
5 <LinearLayout
6 android:layout_width="wrap_content"
7 android:layout_height="wrap_content"
8 android:layout_gravity="center">
9 <EditText
10 android:id="@+id/edit"
11 android:layout_width="wrap_content"
12 android:layout_height="wrap_content"
13 android:hint="文本输入框"
14 />
15 </LinearLayout>
16 <LinearLayout
17 android:layout_width="wrap_content"
18 android:layout_height="wrap_content"
19 android:layout_gravity="center">
20 <Button
21 android:id="@+id/bt"
22 android:layout_width="wrap_content"
23 android:layout_height="wrap_content"
24 android:text="按钮"
25 />
26 </LinearLayout>
27 <LinearLayout
28 android:layout_width="wrap_content"
29 android:layout_height="wrap_content"
30 android:layout_gravity="center">
31 <TextView
32 android:id="@+id/txt"
33 android:layout_width="wrap_content"
34 android:layout_height="wrap_content"
35 android:text="文本标签"
36 />
37 </LinearLayout>
38 </LinearLayout>
1 package com.android.myapplication;
2
3 import androidx.appcompat.app.AppCompatActivity;
4
5 import android.annotation.SuppressLint;
6 import android.os.Bundle;
7 import android.view.View;
8 import android.widget.Button;
9 import android.widget.EditText;
10 import android.widget.TextView;
11
12 public class MainActivity extends AppCompatActivity {
13
14 public String txt;
15
16 @Override
17 protected void onCreate(Bundle savedInstanceState) {
18 super.onCreate(savedInstanceState);
19 setContentView(R.layout.activity_main);
20 final EditText editText=findViewById(R.id.edit);
21 Button button=findViewById(R.id.bt);
22 final TextView textView=findViewById(R.id.txt);
23 button.setOnClickListener(new View.OnClickListener() {
24 @Override
25 public void onClick(View v) {
26 textView.setText(editText.getText().toString());
27 }
28 });
29 }
30 }
