标签:文件 show rac efi 完成 布局 监听 err edr
package com.example.qq_logindemo; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.text.TextUtils; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; import java.io.BufferedInputStream; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.InputStreamReader; public class MainActivity extends AppCompatActivity { private final static String TAG="MainActivity"; private EditText account; private EditText password; private Button login; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //第一步、获取控件 initView(); //第二步、设置监听 initListener(); } /** * 设置回写 */ @Override protected void onResume() { super.onResume(); // File filesDir=this.getFilesDir(); // File cacheDir=this.getCacheDir(); try { FileInputStream fileInputStream = this.openFileInput("info.text"); BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(fileInputStream)); String info = bufferedReader.readLine(); // fos.write((accountText+"***"+passwordText).getBytes()); String[] splits = info.split("\\*\\*\\*"); String account=splits[0]; String password=splits[1]; this.account.setText(account); this.password.setText(password); } catch (Exception e) { e.printStackTrace(); } } /** * 设置监听 */ private void initListener() { login.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { handlerLoginEvent(v); } }); } /** * 处理登陆事件 * @param v */ private void handlerLoginEvent(View v) { //获取账号和密码数据 String accountText = account.getText().toString(); String passwordText= password.getText().toString(); // 方法一 // if (accountText.length()==0) { // Toast.makeText(this,"账号不能为空..",Toast.LENGTH_SHORT).show(); // return; // } // if (passwordText.length()==0) { // Toast.makeText(this,"密码不能为空..",Toast.LENGTH_SHORT).show(); // return; // } if (TextUtils.isEmpty(accountText)) { Toast.makeText(this,"账号不能为空..",Toast.LENGTH_SHORT).show(); return; } if (TextUtils.isEmpty(passwordText)) { Toast.makeText(this,"密码不能为空..",Toast.LENGTH_SHORT).show(); return; } account.setText(""); password.setText(""); //存储 saveInfo(accountText,passwordText); } /** * 存储信息到文件中 * * @param accountText * @param passwordText */ private void saveInfo(String accountText, String passwordText) { File filesDir=this.getFilesDir(); File saveFile=new File(filesDir,"info.text"); //存储路径 File cacheDir=this.getCacheDir(); //缓存路径 Log.d(TAG, "saveInfo: "+saveFile.toString()); Log.d(TAG, "saveInfo: "+cacheDir.toString()); Log.d(TAG, "saveInfo: "+accountText+"---"+passwordText); try { if(!saveFile.exists()){ saveFile.createNewFile(); } FileOutputStream fos=new FileOutputStream(saveFile); fos.write((accountText+"***"+passwordText).getBytes()); fos.close(); } catch (Exception e) { e.printStackTrace(); } Toast.makeText(this,"保存成功",Toast.LENGTH_SHORT).show(); } /** * 找到对应的控件 * */ private void initView() { account = this.findViewById(R.id.et_account); password = this.findViewById(R.id.et_password); login = this.findViewById(R.id.bt_login); } }
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"> <!--QQ登陆UI布局练习--> <LinearLayout android:layout_width="match_parent" android:layout_marginTop="80dp" android:layout_height="wrap_content" android:orientation="vertical" android:padding="30dp"> <TextView android:layout_width="wrap_content" android:drawableLeft="@mipmap/ic_launcher" android:text="QQ" android:textSize="40sp" android:layout_height="wrap_content"/> <EditText android:id="@+id/et_account" android:layout_marginTop="30dp" android:layout_width="match_parent" android:textSize="30sp" android:hint="QQ号码/手机号/邮箱" android:layout_height="wrap_content"/> <EditText android:id="@+id/et_password" android:inputType="textPassword" android:layout_width="match_parent" android:textSize="30sp" android:hint="登陆密码" android:layout_height="wrap_content"/> <Button android:id="@+id/bt_login" android:layout_width="match_parent" android:textSize="20dp" android:text="登陆" android:layout_height="wrap_content"/> <RelativeLayout android:layout_width="match_parent" android:layout_height="wrap_content"> <TextView android:layout_marginTop="10dp" android:layout_width="wrap_content" android:textSize="20dp" android:text="忘记密码?" android:layout_height="wrap_content"/> <TextView android:layout_marginTop="10dp" android:layout_width="wrap_content" android:textSize="20dp" android:layout_alignParentRight="true" android:text="新用户注册" android:layout_height="wrap_content"/> </RelativeLayout> </LinearLayout> <TextView android:layout_centerHorizontal="true" android:layout_width="wrap_content" android:layout_marginBottom="40dp" android:layout_alignParentBottom="true" android:text="登录即代表阅读并同意阅读条款" android:layout_height="wrap_content"/> </RelativeLayout>
标签:文件 show rac efi 完成 布局 监听 err edr
原文地址:https://www.cnblogs.com/suanai/p/12256695.html