如何将Android新手写的小界面优化为长尾词？

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点击按钮会有相应的提示信息，界面简洁。代码如下：

javapublic class MainActivity extends AppCompatActivity { Button confirm, cancel; EditText usrname;

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

confirm=findViewById(R.id.confirm); cancel=findViewById(R.id.cancel); usrname=findViewById(R.id.usrname);

confirm.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // 执行确认操作 } });

cancel.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // 执行取消操作 } }); }}

点击按钮会有相应的提示信息 写得比较粗糙

public class MainActivity extends AppCompatActivity { Button confirm,cancel; EditText usrname; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); confirm = (Button) findViewById(R.id.confirmbtn); cancel = (Button) findViewById(R.id.cancelbtn); usrname = (EditText) findViewById(R.id.inputname); confirm.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(usrname.getText().toString().isEmpty() == false) { Toast.makeText(MainActivity.this, "Name " + usrname.getText().toString() + " confirmed.", Toast.LENGTH_LONG).show(); } else{ Toast.makeText(MainActivity.this, "No confirmed.", Toast.LENGTH_LONG).show(); } } }); cancel.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(MainActivity.this,"Canceled.",Toast.LENGTH_LONG).show(); } }); } } MainActivity.java

package com.example.liugc.mysecondapplication; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.EditText; import android.widget.GridView; import android.widget.ListView; import android.widget.Toast; public class MainActivity extends AppCompatActivity { Button confirm,cancel; EditText usrname; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); confirm = (Button) findViewById(R.id.confirmbtn); cancel = (Button) findViewById(R.id.cancelbtn); usrname = (EditText) findViewById(R.id.inputname); confirm.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(usrname.getText().toString().isEmpty() == false) { Toast.makeText(MainActivity.this, "Name " + usrname.getText().toString() + " confirmed.", Toast.LENGTH_LONG).show(); } else{ Toast.makeText(MainActivity.this, "No confirmed.", Toast.LENGTH_LONG).show(); } } }); cancel.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(MainActivity.this,"Canceled.",Toast.LENGTH_LONG).show(); } }); } } activity_main.xml

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