第一次登陸 記住密碼第二次進入直接進入展示頁面
阿新 • • 發佈：2018-11-28
//佈局
<RelativeLayout 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" tools:context="${relativePackage}.${activityClass}" > <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="90dp" android:hint="請輸入賬號" android:ems="10" > <requestFocus /> </EditText> <EditText android:id="@+id/edit_pass" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/edit_name" android:layout_centerHorizontal="true" android:layout_marginTop="47dp" android:hint="請輸入密碼" android:ems="10" /> <CheckBox android:id="@+id/check_remember" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/edit_pass" android:layout_below="@+id/edit_pass" android:layout_marginTop="29dp" android:text="記住密碼" /> <CheckBox android:id="@+id/check_voluntarily" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/check_remember" android:layout_alignBottom="@+id/check_remember" android:layout_alignRight="@+id/edit_pass" android:text="自動登入" /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/check_remember" android:layout_centerHorizontal="true" android:layout_marginTop="60dp" android:text="登入" /> </RelativeLayout>
//main主介面操作
package com.example.day09_sharedpreferences_demo; import android.app.Activity; import android.content.Intent; import android.content.SharedPreferences; import android.content.SharedPreferences.Editor; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.CompoundButton.OnCheckedChangeListener; import android.widget.EditText; public class MainActivity extends Activity { private SharedPreferences sharedPreferences; private Editor editor; private EditText edit_name,edit_pass; private CheckBox check_remember,check_voluntarily; private Button button; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //1.獲取資源ID findByID(); //2.得到sharedPreferences sharedPreferences = getSharedPreferences("User", MODE_PRIVATE); //得到editor editor = sharedPreferences.edit(); //7.取出記住密碼的狀態值進行判斷 boolean r_ischeck = sharedPreferences.getBoolean("r_ischeck", false); //8.判斷狀態值 如果為true就記住密碼，如果為false就不記住 if(r_ischeck){ String name = sharedPreferences.getString("name", null); String pass= sharedPreferences.getString("pass", null); edit_name.setText(name); edit_pass.setText(pass); check_remember.setChecked(true); } //取出自動登入的狀態值 boolean v_ischeck = sharedPreferences.getBoolean("v_ischeck", false); if(v_ischeck){ Intent intent = new Intent(MainActivity.this,LoginActivity.class); startActivity(intent); finish(); } //勾選自動登入同時記住密碼 check_voluntarily.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { // TODO Auto-generated method stub if(isChecked){ //設定記住密碼為勾選 check_remember.setChecked(true); }else{ //清空 editor.clear(); editor.commit(); } } }); //3.點選按鈕將值存入sharedPreferences button.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // TODO Auto-generated method stub //4.判斷記住密碼是否有沒有勾選 if(check_remember.isChecked()){ //5.獲取輸入框的值 String name = edit_name.getText().toString(); String pass = edit_pass.getText().toString(); //6.將值存入sharedPreferences editor.putString("name", name); editor.putString("pass", pass); //存入一個勾選了的狀態值 editor.putBoolean("r_ischeck", true); //提交 editor.commit(); }else{ //清空 editor.clear(); editor.commit(); } //自動登入 if(check_voluntarily.isChecked()){ editor.putBoolean("v_ischeck", true); editor.commit(); } Intent intent = new Intent(MainActivity.this,LoginActivity.class); startActivity(intent); finish(); } }); } public void findByID(){ edit_name = (EditText) findViewById(R.id.edit_name); edit_pass = (EditText) findViewById(R.id.edit_pass); check_remember = (CheckBox) findViewById(R.id.check_remember); check_voluntarily = (CheckBox) findViewById(R.id.check_voluntarily); button = (Button) findViewById(R.id.button1); } }
//登入成功進入 頁面佈局 (點選登出)
<RelativeLayout 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" tools:context="${relativePackage}.${activityClass}" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="登入成功" /> <Button android:id="@+id/l_but" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:layout_marginBottom="182dp" android:text="登出" /> </RelativeLayout>
//登出程式碼操作
package com.example.day09_sharedpreferences_demo;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class LoginActivity extends Activity {
private SharedPreferences sharedPreferences;
private Editor editor;
private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
//獲取資源ID
button = (Button) findViewById(R.id.l_but);
sharedPreferences = getSharedPreferences("User", MODE_PRIVATE);
editor = sharedPreferences.edit();
//點選登出返回
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
//清空
editor.clear();
editor.commit();
Intent intent = new Intent(LoginActivity.this,MainActivity.class);
startActivity(intent);
finish();
}
});
}
}