倒計時 Handle+Timer 使用sharedPreferences登入 登出
阿新 • • 發佈：2018-12-17
MainActivity : 倒計時
package com.example.yklz1024; import android.content.Intent; import android.os.Handler; import android.os.Message; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; public class MainActivity extends BaseActivity { private TextView countdown; private Button btn_tz; private int temp = 5; Handler handler = new Handler(){ @Override public void handleMessage(Message msg) { super.handleMessage(msg); temp--; if (temp <= 0){ startActivity(new Intent(MainActivity.this,LoginActivity.class)); finish(); }else { countdown.setText(temp + "S"); handler.sendEmptyMessageDelayed(1,1000); } } }; //載入檢視 @Override protected int setView() { return R.layout.activity_main; } //初始化資源控制元件 protected void initViews() { countdown = findViewById(R.id.countdown); btn_tz = findViewById(R.id.btn_tz); } //處理資料 @Override protected void initData() { handler.sendEmptyMessageDelayed(1, 1000); //點選跳轉按鈕 跳轉至登入頁面 btn_tz.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { startActivity(new Intent(MainActivity.this, LoginActivity.class)); handler.sendEmptyMessage(1); finish(); } }); } @Override protected void onDestroy() { super.onDestroy(); handler.removeMessages(1); } }
倒計時頁面的佈局
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <TextView android:id="@+id/countdown" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentEnd="true" android:layout_alignParentTop="true" android:layout_marginEnd="21dp" android:layout_marginTop="16dp" android:text="倒計時" /> <Button android:id="@+id/btn_tz" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:layout_marginBottom="12dp" android:text="點選跳轉" /> </RelativeLayout>
LoginActivity 登陸頁面
package com.example.yklz1024; import android.content.Intent; import android.content.SharedPreferences; 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; public class LoginActivity extends BaseActivity { private EditText edit_name,edit_pwd; private CheckBox check_jz,check_zd; private Button btn_login; private SharedPreferences sharedPreferences; //載入檢視 @Override protected int setView() { return R.layout.activity_login; } //獲取資源id protected void initViews() { edit_name = findViewById(R.id.edit_name); edit_pwd = findViewById(R.id.edit_pwd); check_jz = findViewById(R.id.check_jz); check_zd = findViewById(R.id.check_zd); btn_login = findViewById(R.id.btn_login); } //載入資料 @Override protected void initData() { //獲得sharepreferences sharedPreferences = getSharedPreferences("lz",MODE_PRIVATE); //設定回顯資料 boolean isJZ = sharedPreferences.getBoolean("isJZ", false); String username = sharedPreferences.getString("username",""); String password = sharedPreferences.getString("password", ""); if (isJZ){ edit_name.setText(username); edit_pwd.setText(password); check_jz.setChecked(true); } //設定自動登入 boolean isZD = sharedPreferences.getBoolean("isZD", false); if (isZD){ startActivity(new Intent(LoginActivity.this,HomePageActivity.class)); finish(); } //登入按鈕點選事件 點選跳轉至首頁面 btn_login.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //獲取賬號 密碼 String username = edit_name.getText().toString(); String password = edit_pwd.getText().toString(); //是否選中記住密碼 if (check_jz.isChecked()){ SharedPreferences.Editor editor = sharedPreferences.edit(); editor.putString("username",username); editor.putString("password",password); editor.putBoolean("isJZ",true); editor.commit(); } //是否選中自動登入 if (check_zd.isChecked()){ SharedPreferences.Editor editor = sharedPreferences.edit(); editor.putBoolean("isZD",true); editor.commit(); } startActivity(new Intent(LoginActivity.this,HomePageActivity.class)); finish(); } }); } }
登入頁面的佈局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".LoginActivity">
<EditText
android:id="@+id/edit_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="127dp"
android:hint="請輸入賬號" />
<EditText
android:id="@+id/edit_pwd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignStart="@+id/edit_name"
android:layout_marginTop="200dp"
android:hint="請輸入密碼" />
<CheckBox
android:id="@+id/check_jz"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_centerVertical="true"
android:layout_marginStart="80dp"
android:text="記住密碼" />
<CheckBox
android:id="@+id/check_zd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_centerVertical="true"
android:layout_marginEnd="91dp"
android:text="自動登入" />
<Button
android:id="@+id/btn_login"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="175dp"
android:text="登入" />
</RelativeLayout>
HomePageActivity 首頁面 可登出登入
package com.example.yklz1024;
import android.content.Intent;
import android.content.SharedPreferences;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class HomePageActivity extends BaseActivity {
private Button btn_zx;
private SharedPreferences sharedPreferences;
private SharedPreferences.Editor editor;
//載入檢視
@Override
protected int setView() {
return R.layout.activity_home_page;
}
//初始化資源控制元件
protected void initViews() {
btn_zx = findViewById(R.id.btn_zx);
}
//載入資料
@Override
protected void initData() {
//得到sharedPreferences
sharedPreferences = getSharedPreferences("lz", MODE_PRIVATE);
editor = sharedPreferences.edit();
//登出按鈕點選事件 點選返回登入介面
btn_zx.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//清空登入資訊
editor.clear();
//提交
editor.commit();
//頁面跳轉
startActivity(new Intent(HomePageActivity.this,LoginActivity.class));
finish();
}
});
}
}
首頁面 佈局 登出登入資訊
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".HomePageActivity">
<Button
android:id="@+id/btn_zx"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="登出"/>
</RelativeLayout>
抽取基類 BaseActivity
package com.example.yklz1024;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public abstract class BaseActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//初始化檢視
setContentView(setView());
//初始化資源控制元件
initViews();
//載入資料();
initData();
}
protected abstract int setView();
protected abstract void initViews();
protected abstract void initData();
}