Android Studio学习路程（11）

今天没有学习新的知识，把前面所学的复习了一下，今天做了一个简单的记账APP，实现了它的登录和界面之间的跳转的功能。下面是一些代码，我还没有做完。

package com.example.hp.jizhang;

import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.EditText;

public class MainActivity extends ActionBarActivity implements View.OnClickListener {
    private EditText mEtPhone;
    private EditText mEtPasswd;
    private CheckBox mCBPsd;
    private String TAG ="MainActivity";
    private String SP_PHONE = "sp_phone";
    private String SP_PASSWD = "sp_passwd";
    private String SP_IS_REMEMBER_PSD = "sp_is_remember_psd";
    private SharedPreferences sharedPreferences;
    private boolean mIsChecked=false;

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

        //初始化控件
        initUI();
        //初始化数据
        initData();
    }

    private void initData() {
        //实例化sharedPreferences对象
        if(sharedPreferences==null){
            sharedPreferences = getApplicationContext().getSharedPreferences("config", Context.MODE_PRIVATE);
        }
        //回显数据
        mEtPhone.setText(sharedPreferences.getString(SP_PHONE,""));
        mEtPasswd.setText(sharedPreferences.getString(SP_PASSWD,""));
        mCBPsd.setChecked(mIsChecked);
    }

    private void initUI() {
        //获取登录按钮
        findViewById(R.id.btn_denglu).setOnClickListener(this);
        //获取电话和密码输入框
        mEtPhone = (EditText) findViewById(R.id.et_phone);
        //文本改变之后记录电话
        mEtPhone.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void afterTextChanged(Editable editable) {
                if(mIsChecked){
                    if(sharedPreferences==null){
                        sharedPreferences = getApplicationContext().getSharedPreferences("config", Context.MODE_PRIVATE);
                    }
                    SharedPreferences.Editor edit = sharedPreferences.edit();
                    edit.putString(SP_PHONE, mEtPhone.getText().toString());
                    edit.commit();
                }
            }
        });
        mEtPasswd = (EditText) findViewById(R.id.et_passwd);
        mEtPasswd.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void afterTextChanged(Editable editable) {
                if(mIsChecked){
                    if(sharedPreferences==null){
                        sharedPreferences = getApplicationContext().getSharedPreferences("config", Context.MODE_PRIVATE);
                    }
                    SharedPreferences.Editor edit = sharedPreferences.edit();
                    edit.putString(SP_PASSWD, mEtPasswd.getText().toString());
                    edit.commit();
                }
            }
        });
        //获取多选按钮
        mCBPsd = (CheckBox) findViewById( R.id.cb_remember_psd);
        mCBPsd.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, boolean isChecked) {
                Log.d(TAG, "状态为：" + isChecked);
                mIsChecked = isChecked;
                if (isChecked) {
                    //实例化SharedPreferences对象
                    if (sharedPreferences == null) {
                        sharedPreferences = getApplicationContext().getSharedPreferences("config", Context.MODE_PRIVATE);
                    }
                    //实例化SharedPreferences的编辑者对象
                    SharedPreferences.Editor edit = sharedPreferences.edit();
                    edit.putString(SP_PHONE, mEtPhone.getText().toString());
                    edit.putString(SP_PASSWD, mEtPasswd.getText().toString());
                    edit.putBoolean(SP_IS_REMEMBER_PSD, isChecked);
                    //提交
                    edit.commit();


                }
            }
        });
    }
    //获取到登录按钮后用intent方法跳转到下一个界面
    @Override
    public void onClick(View view) {
        Intent intent = new Intent();
        switch (view.getId()){
            case R.id.btn_denglu:

                //跳转到第一个界面
                intent.setClass(getApplicationContext(),FirstActivity.class);
                break;
        }
        startActivity(intent);
    }
}

package com.example.hp.jizhang;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;

/**
 * Created by hp on 2020/2/16.
 */
public class FirstActivity extends ActionBarActivity implements View.OnClickListener {
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_first);

        //初始化控件
        initUI();
    }

    private void initUI() {
        //获取控件的id
        findViewById(R.id.tv_income_month);//获取“月收入”
        findViewById(R.id.tv_output_month);//获取“月支出”
        findViewById(R.id.tv_balance);   //获取“余额”
        findViewById(R.id.btn_add_one).setOnClickListener(this);   //获取按钮“记一笔”

    }


    @Override
    public void onClick(View view) {
        Intent intent = new Intent();
        switch (view.getId()){
            case R.id.btn_add_one:
                //点击“记一笔”按钮跳转到第二个界面
                intent.setClass(getApplicationContext(),SecondActivity.class);
                break;
        }
        startActivity(intent);
    }
}

package com.example.hp.jizhang;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;

/**
 * Created by hp on 2020/2/16.
 */
public class SecondActivity extends ActionBarActivity implements View.OnClickListener {
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_second);
        //初始化控件
        initUI();
    }

    private void initUI() {
        findViewById(R.id.btn_secondActivity_return).setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        Intent intent = new Intent();
        switch (view.getId()){
            case R.id.btn_secondActivity_return:
                //按返回按钮跳转到第一个界面
                intent.setClass(getApplicationContext(),FirstActivity.class);
                break;
            //按收入按钮跳转到第三个界面
            case R.id.btn_income:
                intent.setClass(getApplicationContext(),ThirdActivity.class);
            case R.id.btn_output:
                intent.setClass(getApplicationContext(),FouthActivity.class);
        }
        startActivity(intent);
    }
}

package com.example.hp.jizhang;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;

import com.example.hp.jizhang.entity.User;

/**
 * Created by hp on 2020/2/16.
 */
public class ThirdActivity extends ActionBarActivity implements View.OnClickListener {
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_third);
        //初始化控件
        initUI();
        //初始化数据
        initData();

    }

    private void initData() {
        User user = new User();
    }

    private void initUI() {
        findViewById(R.id.btn_thirdActivity_return).setOnClickListener(this);
    }
    @Override
    public void onClick(View view) {
        Intent intent = new Intent();
        switch (view.getId()){
            case R.id.btn_thirdActivity_return:
                //跳转到第二个界面
                intent.setClass(getApplicationContext(),SecondActivity.class);
                break;
        }
        startActivity(intent);

    }
}

package com.example.hp.jizhang;

import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;

/**
 * Created by hp on 2020/2/16.
 */
public class FouthActivity extends ActionBarActivity implements View.OnClickListener {

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_fouth);
        //初始化控件
        initUI();

    }

    private void initUI() {
        findViewById(R.id.btn_fouthActivity_return).setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        Intent intent = new Intent();
        switch (view.getId()){
            case R.id.btn_fouthActivity_return:
                //跳转到第二个界面
                intent.setClass(getApplicationContext(),SecondActivity.class);
                break;
        }
        startActivity(intent);
    }
}

下面是一些布局文件：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.hp.jizhang.MainActivity">

    <EditText
        android:id="@+id/et_phone"
        android:inputType="phone"
        android:hint="电话:"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <EditText
        android:id="@+id/et_passwd"
        android:inputType="textPassword"
        android:hint="密码:"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
    <CheckBox
        android:id="@+id/cb_remember_psd"
        android:text="记住账户"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <Button
        android:id="@+id/btn_denglu"
        android:text="登录"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />




</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<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"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.hp.jizhang.FirstActivity">


    <TextView
        android:id="@+id/tv_income_month"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:textSize="30dp"
        android:text="    本月收入：3000"
        android:background="@android:color/background_light"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="59dp"/>

    <TextView
        android:id="@+id/tv_output_month"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:textSize="30dp"
        android:text="     本月支出：2000"
        android:background="@android:color/background_light"
        android:layout_centerVertical="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"/>

    <TextView
        android:id="@+id/tv_balance"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:textSize="30dp"
        android:text="      本月余额：1000"
        android:background="@android:color/background_light"
        android:layout_above="@id/btn_add_one"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginBottom="66dp"/>

    <Button
        android:id="@+id/btn_add_one"
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:text="  +  记一笔"
        android:textSize="40dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginBottom="47dp"/>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<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"
    android:background="#000000"
    android:padding="@dimen/activity_vertical_margin"
    tools:context="com.example.hp.jizhang.SecondActivity">


    <Button
        android:id="@+id/btn_secondActivity_return"
        android:layout_width="80dp"
        android:layout_height="50dp"
        android:text="返回"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />
    <EditText
        android:id="@+id/et_put_money"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:textColor="#870c0c"
        android:hint="请输入金额："
        android:background="#9bc9e1"
        android:textSize="20dp"
        android:layout_marginTop="44dp"
        android:layout_below="@id/tv_money"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />
    <TextView
        android:id="@+id/tv_money"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:text="金额"
        android:textColor="#f9f6f6"
        android:textSize="20dp"
        android:layout_marginTop="35dp"
        android:layout_below="@id/btn_secondActivity_return"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"/>

    <Button
        android:id="@+id/btn_output"
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:text="支出"
        android:textColor="#f04b4b"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />
    <Button
        android:id="@+id/btn_income"
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:text="收入"
        android:textColor="#6597ed"
        android:layout_above="@id/btn_output"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginBottom="45dp" />


</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<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"
    android:padding="@dimen/activity_vertical_margin"
    tools:context="com.example.hp.jizhang.ThirdActivity">

    <Button
        android:id="@+id/btn_thirdActivity_return"
        android:layout_width="80dp"
        android:layout_height="50dp"
        android:text="返回"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />
    <TextView
        android:id="@+id/tv_income_all"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:text="收入总额："
        android:textColor="#726f6f"
        android:textSize="30dp"
        android:background="#000000"
        android:layout_below="@id/btn_thirdActivity_return"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true"
        android:layout_marginTop="31dp"/>
    <EditText
        android:id="@+id/et_income_money"
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:textColor="#870c0c"
        android:hint="收入金额（￥）："
        android:layout_below="@id/tv_income_all"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="41dp" />

    <EditText
        android:id="@+id/et_income_nature"
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:textColor="#870c0c"
        android:hint="收入类型："
        android:layout_marginBottom="35dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<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"
    android:padding="@dimen/activity_vertical_margin"
    tools:context="com.example.hp.jizhang.FouthActivity">

    <Button
        android:id="@+id/btn_fouthActivity_return"
        android:layout_width="80dp"
        android:layout_height="50dp"
        android:text="返回"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

    <TextView
        android:id="@+id/tv_output_all"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:text="支出总额："
        android:textColor="#726f6f"
        android:textSize="30dp"
        android:background="#000000"
        android:layout_below="@id/btn_fouthActivity_return"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="71dp"/>
    <EditText
        android:id="@+id/et_output_money"
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:textColor="#870c0c"
        android:hint="支出金额（￥）："
        android:layout_below="@id/tv_output_all"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_marginTop="32dp" />

    <EditText
        android:id="@+id/et_output_nature"
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:textColor="#870c0c"
        android:hint="支出类型："
        android:layout_marginBottom="50dp"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />




</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.hp.jizhang">

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".FirstActivity">

        </activity>
        <activity android:name=".SecondActivity">

        </activity>
        <activity android:name=".ThirdActivity">

        </activity>
        <activity android:name=".FouthActivity">

        </activity>
    </application>

</manifest>