#3456 hzuapps#1236 第3456次实验

Soft1606070302235/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.ibook"
+    android:versionCode="1"
+    android:versionName="1.0" >
+
+    <uses-sdk
+        android:minSdkVersion="8"
+        android:targetSdkVersion="17" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@drawable/icon_app"
+        android:label="@string/app_names"
+        android:theme="@style/AppTheme" >
+        <activity
+            android:name="com.example.ibook.MainActivity"
+            android:label="@string/app_names" >
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+        <activity
+            android:name="com.example.ibook.SecondAtivity"
+            android:label="@string/app_names" >
+        </activity>
+    </application>
+
+</manifest>

Soft1606070302235/Soft1606070302235Activity.java

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+package edu.hzuapps.androidlabs.soft1606070302235;
+
+public class Soft1606070302235Activity{
+
+}

Soft1606070302235/java/edu/hzuapps/androidlabs/Soft1606070302235/SecondActivity.java

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+package edu.hzuapps.androidlabs.soft1606070302235;
+
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Date;
+
+import com.example.beans.Cuns;
+import com.example.luoji.MyDataBase;
+import com.example.luoji.MyOpenHelper;
+
+import android.os.Bundle;
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.database.sqlite.SQLiteDatabase;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.Toast;
+
+/*
+ *用来编辑日记
+ *主要包括一个方法，isSave()用来保存数据;
+ */
+public class SecondActivity extends Activity {
+
+    EditText ed1,ed2;
+    Button bt1;
+    MyDataBase myDatabase;
+    Cuns cun;
+    int ids;
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_second);
+        ed1=(EditText) findViewById(R.id.editText1);
+        ed2=(EditText) findViewById(R.id.editText2);
+        bt1=(Button) findViewById(R.id.button1);
+        myDatabase=new MyDataBase(this);
+
+        Intent intent=this.getIntent();
+        ids=intent.getIntExtra("ids", 0);
+        //默认为0，不为0,则为修改数据时跳转过来的
+        if(ids!=0){
+            cun=myDatabase.getTiandCon(ids);
+            ed1.setText(cun.getTitle());
+            ed2.setText(cun.getContent());
+        }
+        //保存按钮的点击事件，他和返回按钮是一样的功能，所以都调用isSave()方法；
+        bt1.setOnClickListener(new OnClickListener() {
+
+            @Override
+            public void onClick(View v) {
+                // TODO Auto-generated method stub
+                isSave();
+            }
+        });
+    }
+    /*
+     * 返回按钮调用的方法。
+     * @see android.app.Activity#onBackPressed()
+     */
+    @Override
+    public void onBackPressed() {
+        // TODO Auto-generated method stub
+        //super.onBackPressed();
+        SimpleDateFormat   formatter   =   new   SimpleDateFormat   ("yyyy.MM.dd  HH:mm:ss");
+        Date   curDate   =   new   Date(System.currentTimeMillis());//获取当前时间
+        String times   =   formatter.format(curDate);
+        String title=ed1.getText().toString();
+        String content=ed2.getText().toString();
+        //是要修改数据
+        if(ids!=0){
+            cun=new Cuns(title,ids, content, times);
+            myDatabase.toUpdate(cun);
+            Intent intent=new Intent(SecondActivity.this,Soft1606070302235Activity.class);
+            startActivity(intent);
+            SecondActivity.this.finish();
+        }
+        //新建日记
+        else{
+            if(title.equals("")&&content.equals("")){
+                Intent intent=new Intent(SecondActivity.this,Soft1606070302235Activity.class);
+                startActivity(intent);
+                SecondActivity.this.finish();
+            }
+            else{
+                cun=new Cuns(title,content,times);
+                myDatabase.toInsert(cun);
+                Intent intent=new Intent(SecondActivity.this,Soft1606070302235Activity.class);
+                startActivity(intent);
+                SecondActivity.this.finish();
+            }
+
+        }
+    }
+    private void isSave(){
+        SimpleDateFormat   formatter   =   new   SimpleDateFormat   ("yyyy.MM.dd  HH:mm:ss");
+        Date   curDate   =   new   Date(System.currentTimeMillis());//获取当前时间
+        String times   =   formatter.format(curDate);
+        String title=ed1.getText().toString();
+        String content=ed2.getText().toString();
+        //是要修改数据
+        if(ids!=0){
+            cun=new Cuns(title,ids, content, times);
+            myDatabase.toUpdate(cun);
+            Intent intent=new Intent(SecondActivity.this,Soft1606070302235Activity.class);
+            startActivity(intent);
+            SecondActivity.this.finish();
+        }
+        //新建日记
+        else{
+            cun=new Cuns(title,content,times);
+            myDatabase.toInsert(cun);
+            Intent intent=new Intent(SecondActivity.this,Soft1606070302235Activity.class);
+            startActivity(intent);
+            SecondActivity.this.finish();
+        }
+    }
+
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        // Inflate the menu; this adds items to the action bar if it is present.
+        getMenuInflater().inflate(R.menu.second_activity, menu);
+        return true;
+    }
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        // TODO Auto-generated method stub
+        switch (item.getItemId()) {
+            case R.id.action_settings:
+                Intent intent=new Intent(Intent.ACTION_SEND);
+                intent.setType("text/plain");
+                intent.putExtra(Intent.EXTRA_TEXT, "标题："+ed1.getText().toString()+"    内容："+ed2.getText().toString());
+                startActivity(intent);
+                break;
+
+            default:
+                break;
+        }
+        return false;
+    }
+
+
+}
+

Soft1606070302235/java/edu/hzuapps/androidlabs/Soft1606070302235/Soft1606070302235Activity.java

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+package edu.hzuapps.androidlabs.soft1606070302235;
+import java.util.ArrayList;
+
+import com.example.beans.Cuns;
+import com.example.luoji.MyAdapter;
+import com.example.luoji.MyDataBase;
+
+import android.os.Bundle;
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.View.OnLongClickListener;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.AdapterView.OnItemLongClickListener;
+import android.widget.Button;
+import android.widget.ListView;
+
+/*
+ * 这个类主要包括五个点击事件，分别为
+ * 1，ListView的长按点击事件，用来AlertDialog来判断是否删除数据。
+ * 2，ListView的点击事件，跳转到第二个界面，用来修改数据
+ * 3，新建便签按钮的点击事件，跳转到第二界面，用来新建便签
+ * 4，menu里的退出事件，用来退出程序
+ * 5，menu里的新建事件，用来新建便签
+ */
+public class Soft1606070302235Activity extends Activity {
+
+    Button bt;
+    ListView lv;
+    LayoutInflater inflater;
+    ArrayList<Cuns> array;
+    MyDataBase mdb;
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_soft1606070302235);
+
+        lv=(ListView) findViewById(R.id.listView1);
+        bt=(Button) findViewById(R.id.button1);
+        inflater=getLayoutInflater();
+
+        mdb=new MyDataBase(this);
+        array=mdb.getArray();
+        MyAdapter adapter=new MyAdapter(inflater,array);
+        lv.setAdapter(adapter);
+        /*
+         * 点击listView里面的item,进入到第二个页面，用来修改日记
+         */
+        lv.setOnItemClickListener(new OnItemClickListener() {
+            @Override
+            public void onItemClick(AdapterView<?> parent, View view,
+                                    int position, long id) {
+                // TODO Auto-generated method stub
+                Intent intent=new Intent(getApplicationContext(),SecondActivity.class);
+                intent.putExtra("ids",array.get(position).getIds() );
+                startActivity(intent);
+                Soft1606070302235Activity.this.finish();
+            }
+        });
+        /*
+         * 长点后来判断是否删除数据
+         */
+        lv.setOnItemLongClickListener(new OnItemLongClickListener() {
+
+            @Override
+            public boolean onItemLongClick(AdapterView<?> parent, View view,
+                                           final int position, long id) {
+                // TODO Auto-generated method stub
+                //AlertDialog,来判断是否删除日记。
+                new AlertDialog.Builder(Soft1606070302235Activity.this)
+                        .setTitle("删除")
+                        .setMessage("是否删除笔记")
+                        .setNegativeButton("取消", new DialogInterface.OnClickListener() {
+
+                            @Override
+                            public void onClick(DialogInterface dialog, int which) {
+                                // TODO Auto-generated method stub
+
+                            }
+                        })
+                        .setPositiveButton("确定", new DialogInterface.OnClickListener() {
+
+                            @Override
+                            public void onClick(DialogInterface dialog, int which) {
+                                // TODO Auto-generated method stub
+                                mdb.toDelete(array.get(position).getIds());
+                                array=mdb.getArray();
+                                MyAdapter adapter=new MyAdapter(inflater,array);
+                                lv.setAdapter(adapter);
+                            }
+                        })
+                        .create().show();
+                return true;
+            }
+        });
+        /*
+         * 按钮点击事件，用来新建日记
+         */
+        bt.setOnClickListener(new OnClickListener() {
+
+            @Override
+            public void onClick(View v) {
+                // TODO Auto-generated method stub
+                Intent intent=new Intent(getApplicationContext(),SecondActivity.class);
+                startActivity(intent);
+                Soft1606070302235Activity.this.finish();
+            }
+        });
+
+
+
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        // Inflate the menu; this adds items to the action bar if it is present.
+        getMenuInflater().inflate(R.menu.main, menu);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        // TODO Auto-generated method stub
+        switch (item.getItemId()) {
+            case R.id.item1:
+                Intent intent=new Intent(getApplicationContext(),SecondActivity.class);
+                startActivity(intent);
+                this.finish();
+                break;
+            case R.id.item2:
+                this.finish();
+                break;
+            default:
+                break;
+        }
+        return true;
+
+    }
+
+
+}
+

Soft1606070302235/java/edu/hzuapps/androidlabs/beans/Cuns.java

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+package com.example.beans;
+/*
+ * 用来暂时存储数据
+ */
+public class Cuns {
+ private String title;//标题
+ private String content;//内容
+ private String times;//时间
+ private int ids;//编号
+ public Cuns(String ti,int id,String con ,String time){
+	 this.ids=id;
+	 this.title=ti;
+	 this.content=con;
+	 this.times=time;
+ }
+ public Cuns(String ti,String con,String time){
+	 this.title=ti;
+	 this.content=con;
+	 this.times=time;
+ }
+ public Cuns(int i,String ti,String time){
+	 this.ids=i;
+	 this.title=ti;
+	 this.times=time;
+ }
+ public Cuns(String ti,String con){
+	 this.title=ti;
+	 this.content=con;
+ }
+public int getIds() {
+	return ids;
+}
+public String getTitle() {
+	return title;
+}
+public String getContent() {
+	return content;
+}
+public String getTimes() {
+	return times;
+}
+
+}