android 编程6.3.3
close现在的项目，然后打开以前我们做的账号密码登录的模拟项目，修改activity_login.xml文件<?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">
<LinearLayout
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="60dp">
<TextView
android:layout_width="90dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:textSize="18sp"
android:text="Account:"/>
<EditText
android:id="@+id/account"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:layout_gravity="center_vertical"/>
</LinearLayout>
<LinearLayout
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="60dp">
<TextView
android:layout_width="90dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:textSize="18sp"
android:text="Password:"/>
<EditText
android:id="@+id/password"
android:layout_width="90dp"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:inputType="textPassword"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<CheckBox
android:id="@+id/remember_pass"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="18sp"
android:text="Remember password"/>
</LinearLayout>
<Button
android:id="@+id/login"
android:layout_width="match_parent"
android:layout_height="60dp"
android:text="Login"/>
</LinearLayout>
修改loginactivity.java文件package com.example.xinwei.broadcastbestpractice;
import android.content.Intent;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.Toast;
public class LoginActivity extends BaseActivity {
private SharedPreferences pref;
private SharedPreferences.Editor editor;
private CheckBox rememberPass;
private EditText accountEdit;
private EditText passwordEdit;
private Button login;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
pref = PreferenceManager.getDefaultSharedPreferences(this);
accountEdit=(EditText)findViewById(R.id.account);
passwordEdit=(EditText)findViewById(R.id.password);
rememberPass = (CheckBox)findViewById(R.id.remember_pass);
login = (Button)findViewById(R.id.login);
boolean isRemember = pref.getBoolean("remember_password",false);
if(isRemember){
String account = pref.getString("account","");
String password = pref.getString("password","");
accountEdit.setText(account);
passwordEdit.setText(password);
rememberPass.setChecked(true);
}
login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String account=accountEdit.getText().toString();
String password=passwordEdit.getText().toString();
if(account.equals("admin")&&password.equals("123456")){
editor=pref.edit();
if(rememberPass.isChecked()){
editor.putBoolean("remember_password",true);
editor.putString("account",account);
editor.putString("password",password);
}else {
editor.clear();
}
editor.apply();
Intent intent=new Intent(LoginActivity.this,MainActivity.class);
startActivity(intent);
finish();
}else{
Toast.makeText(LoginActivity.this, "account or password is invalid", Toast.LENGTH_SHORT).show();
}
}
});
}
}
这只是个小练习，没什么可说的。效果图：
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