三种方式实现点击按钮显示输入的信息

1.内部类

（1）MainActivity：

package inspur.com.hello;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    private EditText et_pbone;
    private Button bt_show;
    private TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化
        et_pbone= (EditText) findViewById(R.id.et_phone);
        bt_show= (Button) findViewById(R.id.btn_show);
        textView=(TextView)findViewById(R.id.tv_show);

        //事件源绑定事件监听器
        bt_show.setOnClickListener(new Mylistener());
    }

    class Mylistener implements View.OnClickListener{
        @Override
        public void onClick(View v) {
            String num = et_pbone.getText().toString();
            textView.setText("您的手机号是"+num);
        }
    }
}

（2）.显示布局main_activity.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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: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="inspur.com.hello.MainActivity"
    android:orientation="vertical"
    >

    <EditText
        android:id="@+id/et_phone"
        android:hint="请输入手机号"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <Button
        android:id="@+id/btn_show"
        android:text="显示您输入的手机号"
        android:layout_gravity="center"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <TextView
        android:id="@+id/tv_show"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="" />
</LinearLayout>

（3）.AndroidManifest.xml

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
 3     package="inspur.com.hello">
 4 
 5     <application
 6         android:allowBackup="true"
 7         android:icon="@mipmap/ic_launcher"
 8         android:label="@string/app_name"
 9         android:supportsRtl="true"
10         android:theme="@style/AppTheme">
11         <activity android:name=".MainActivity">     /*此处设置MainActivity为主入口*/
12             <intent-filter>
13                 <action android:name="android.intent.action.MAIN" />
14 
15                 <category android:name="android.intent.category.LAUNCHER" />
16             </intent-filter>
17         </activity>
18     </application>
19 
20 </manifest>

2.内部类

package inspur.com.hello;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

/**
 * Created by Administrator on 2018/5/4.
 */
public class SActivity extends Activity {
     // 声明
    private TextView textView;
    private Button button;
    private EditText editText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //初始化
        textView=(TextView) findViewById(R.id.tv_show);
        button = (Button) findViewById(R.id.btn_show);
        editText = (EditText) findViewById(R.id.et_phone);
        //事件绑定事件监听器
        button.setOnClickListener(new Mylistener(textView,editText));

    }
}
/*外部类*/
class  Mylistener implements View.OnClickListener{
    private TextView tv;
    private EditText et;

    public Mylistener(TextView tv,EditText et) {
        this.tv=tv;
        this.et=et;
    }

    @Override
    public void onClick(View v) {
        String num = et.getText().toString();
        tv.setText("22您的手机号是"+num);
    }
}