安卓Andriod使用入门(二十六)【记事本】

一个伟大的人有两颗心：一颗心流血；另一颗心宽容。

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MainActivity.java代码:

package siso.smartnotef.activity;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

import siso.smartnotef.R;
import siso.smartnotef.adapter.NotepadeAdapter;
import siso.smartnotef.db.DataHelper;
import siso.smartnotef.global.GlobalParams;
import siso.smartnotef.model.NotepadBean;
import siso.smartnotef.model.NotepadWithDataBean;
import siso.smartnotef.service.MainService;

public class MainActivity extends AppCompatActivity implements View.OnClickListener, NotepadeAdapter.ClickFunction {

private TextView tv_add;
private ListView lv_contents;
private List<NotepadWithDataBean> notepadWithDataBeanList;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Intent intent1 = new Intent(MainActivity.this, MainService.class);
        startService(intent1);
        findViews();
        setListeners();
        initView();

    }

private void findViews() {
        tv_add = (TextView) findViewById(R.id.tv_add);
        lv_contents = (ListView) findViewById(R.id.lv_content);
    }

private void setListeners() {
        tv_add.setOnClickListener(this);
    }

private void initView() {
        DataHelper helper = new DataHelper(MainActivity.this);
        notepadWithDataBeanList = new ArrayList<NotepadWithDataBean>();
        List<NotepadBean> notepadBeanList = helper.getNotepadList();
for (int i = 0; i < notepadBeanList.size(); i++) {
if (0 == notepadWithDataBeanList.size()) {
                NotepadWithDataBean notepadWithDataBean = new NotepadWithDataBean();
                notepadWithDataBean.setData(notepadBeanList.get(0).getDate());
                notepadWithDataBeanList.add(notepadWithDataBean);
            }
boolean flag = true;
for (int j = 0; j < notepadWithDataBeanList.size(); j++) {
int date = notepadWithDataBeanList.get(j).getData();
if (date == notepadBeanList.get(i).getDate()) {
                    notepadWithDataBeanList.get(j).getNotepadBeenList().add(notepadBeanList.get(i));
                    flag = false;
break;
                }
            }
if (flag) {
                NotepadWithDataBean notepadWithDataBean = new NotepadWithDataBean();
                notepadWithDataBean.setData(notepadBeanList.get(i).getDate());
                notepadWithDataBeanList.add(notepadWithDataBean);
                notepadWithDataBeanList.get(notepadWithDataBeanList.size() - 1).getNotepadBeenList().add(notepadBeanList.get(i));
            }
        }
        NotepadeAdapter adapter = new NotepadeAdapter(MainActivity.this, notepadWithDataBeanList, this);
        lv_contents.setAdapter(adapter);
// setListViewHeightBasedOnChildren(lv_contents);
    }

public void setListViewHeightBasedOnChildren(ListView listView) {
if (listView == null) return;
        ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
// pre-condition
return;
        }
int totalHeight = 0;
for (int i = 0; i < listAdapter.getCount(); i++) {
            View listItem = listAdapter.getView(i, null, listView);
            listItem.measure(0, 0);
            totalHeight += listItem.getMeasuredHeight();
        }
        ViewGroup.LayoutParams params = listView.getLayoutParams();
        params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
        listView.setLayoutParams(params);
    }

@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.tv_add:
                Intent intent = new Intent();
                Bundle bundle = new Bundle();
                bundle.putInt(GlobalParams.TYPE_KEY, GlobalParams.TYPE_ADD);
                intent.putExtras(bundle);
                intent.setClass(MainActivity.this, AddContentActivity.class);
                startActivityForResult(intent, GlobalParams.ADD_REQUEST);
break;
        }
    }

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case GlobalParams.ADD_REQUEST:
if (GlobalParams.ADD_RESULT_OK == resultCode) {
                    initView();
                }
break;
        }
    }

@Override
public void clickItem(int position, int itemPosition) {
        Bundle bundle = new Bundle();
        bundle.putInt(GlobalParams.TYPE_KEY, GlobalParams.TYPE_EDIT);
        bundle.putSerializable(GlobalParams.BEAN_KEY, notepadWithDataBeanList.get(position));
        bundle.putInt(GlobalParams.ITEM_POSITION_KEY, itemPosition);
        Intent intent = new Intent(this, AddContentActivity.class);
        intent.putExtras(bundle);
        startActivityForResult(intent, GlobalParams.ADD_REQUEST);
    }

@Override
public void longClickItem(final int position, final int itemPostion) {
        AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
        builder.setMessage("确认删除吗？");
        builder.setTitle("提示");
        builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
                DataHelper helper = new DataHelper(MainActivity.this);
                helper.deleteNotepad(notepadWithDataBeanList.get(position).getNotepadBeenList().get(itemPostion).getId());
                initView();
            }
        });
        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        });
        builder.create().show();
    }
}

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AddContentActivity.java代码:

package siso.smartnotef.activity;

import android.app.DatePickerDialog;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.DatePicker;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;

import java.util.Calendar;

import siso.smartnotef.R;
import siso.smartnotef.db.DataHelper;
import siso.smartnotef.global.GlobalParams;
import siso.smartnotef.model.NotepadBean;
import siso.smartnotef.model.NotepadWithDataBean;

public class AddContentActivity extends AppCompatActivity implements View.OnClickListener {

private TextView tv_save;
private TextView tv_date;
private TextView tv_time;
private TextView tv_cancel;
private EditText et_content;
private String time = "";
private String date = "";
private Bundle bundle;
private int type;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_add_content);
        bundle=getIntent().getExtras();
        type=bundle.getInt(GlobalParams.TYPE_KEY);
        findViews();
        setListeners();
        initDate();
    }

private void findViews() {
        et_content=(EditText)findViewById(R.id.et_content);
        tv_save = (TextView) findViewById(R.id.tv_save);
        tv_date = (TextView) findViewById(R.id.tv_date);
        tv_time = (TextView) findViewById(R.id.tv_time);
        tv_cancel=(TextView)findViewById(R.id.tv_cancel);
    }

private void setListeners() {
        tv_save.setOnClickListener(this);
        tv_date.setOnClickListener(this);
        tv_time.setOnClickListener(this);
        tv_cancel.setOnClickListener(this);
    }

private void initDate() {
        Calendar c = Calendar.getInstance();
int year=c.get(Calendar.YEAR);
int month=c.get(Calendar.MONTH);
int day=c.get(Calendar.DAY_OF_MONTH);
        date=getDate(year,month,day);
if(type==GlobalParams.TYPE_EDIT){
            NotepadWithDataBean notepadWithDataBean=(NotepadWithDataBean)(bundle.getSerializable(GlobalParams.BEAN_KEY));
            et_content.setText(notepadWithDataBean.getNotepadBeenList().get(bundle.getInt(GlobalParams.ITEM_POSITION_KEY)).getContent());
            date=notepadWithDataBean.getData()+"";
            tv_date.setText(date);
            time=notepadWithDataBean.getNotepadBeenList().get(bundle.getInt(GlobalParams.ITEM_POSITION_KEY)).getTime();
            tv_time.setText(time);
        }
    }

private String  getDate(int year,int month,int day){
        String date="";
        date+=year;
if(month<9){
            date=date+"0"+(month+1);
        }else{
            date+=(month+1);
        }
if(day<10){
            date=date+"0"+day;
        }else {
            date+=day;
        }
return date;
    }
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.tv_save:
if(type==GlobalParams.TYPE_EDIT){
                    update();
                }else {
                    save();
                }
break;
case R.id.tv_date:
                selectDateDialog();
break;
case R.id.tv_time:
                selectTimeDialog();
break;
case R.id.tv_cancel:
                finish();
break;
        }
    }
private void selectDateDialog(){
        Calendar c = Calendar.getInstance();
int year=c.get(Calendar.YEAR);
final int month=c.get(Calendar.MONTH)+1;
int day=c.get(Calendar.DAY_OF_MONTH);
new DatePickerDialog(AddContentActivity.this, new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                date=getDate(year,monthOfYear,dayOfMonth);
                tv_date.setText(date);
            }
        },year,month,day).show();
    }

private void selectTimeDialog() {
        Calendar c = Calendar.getInstance();
int mHour = c.get(Calendar.HOUR_OF_DAY);
int mMinute = c.get(Calendar.MINUTE);
new TimePickerDialog(AddContentActivity.this,
new TimePickerDialog.OnTimeSetListener() {

@Override
public void onTimeSet(TimePicker view,
int hourOfDay, int minute) {
                        time=formatTime(hourOfDay,minute);
                        tv_time.setText(time);
                    }
                }, mHour, mMinute, true).show();
    }

private String formatTime(int hour,int minute){
        String time=hour+":";
if(minute<10){
            time=time+"0"+minute;
        }else{
            time+=minute;
        }
return time;
    }
private void save() {
        String content = et_content.getText().toString();
if ("".equals(content)) {
            Toast.makeText(AddContentActivity.this, "请输入内容", Toast.LENGTH_SHORT).show();
return;
        }
if ("".equals(time)) {
            Toast.makeText(AddContentActivity.this, "请选择时间", Toast.LENGTH_SHORT).show();
return;
        }
        NotepadBean notepadBean = new NotepadBean();
        notepadBean.setContent(content);
        notepadBean.setDate(Integer.parseInt(date));
        notepadBean.setTime(time);
        DataHelper helper = new DataHelper(AddContentActivity.this);
        helper.insertData(notepadBean);
        setResult(GlobalParams.ADD_RESULT_OK);
        finish();
    }
private void update(){
        DataHelper helper=new DataHelper(AddContentActivity.this);
        NotepadWithDataBean bean=(NotepadWithDataBean)(bundle.getSerializable(GlobalParams.BEAN_KEY));
int itemPosition=bundle.getInt(GlobalParams.ITEM_POSITION_KEY);
        helper.update(bean.getNotepadBeenList().get(itemPosition).getId(),date,time,et_content.getText().toString());
        setResult(GlobalParams.ADD_RESULT_OK);
        finish();
    }
}

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RemindActivity.java代码:

package siso.smartnotef.activity;

import android.media.MediaPlayer;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import java.io.IOException;

import siso.smartnotef.R;
import siso.smartnotef.global.GlobalParams;

public class RemindActivity extends AppCompatActivity {

private TextView tv_content;
private Button bt_confirm;
private MediaPlayer mMediaPlayer;;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_remind);
        findViews();
        setListeners();
        Bundle bundle=getIntent().getExtras();
        String content=bundle.getString(GlobalParams.CONTENT_KEY);
        tv_content.setText(content);
        playSound();
    }

private void findViews(){
        tv_content=(TextView)findViewById(R.id.tv_content);
        bt_confirm=(Button) findViewById(R.id.bt_confirm);
    }
private void setListeners(){
        bt_confirm.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(null!=mMediaPlayer){
                  mMediaPlayer.stop();
                  finish();
              }
            }
        });
    }

public void playSound() {
new Thread(new Runnable() {
@Override
public void run() {
                mMediaPlayer = MediaPlayer.create(RemindActivity.this, getSystemDefultRingtoneUri());
                mMediaPlayer.setLooping(true);//设置循环
try {
                    mMediaPlayer.prepare();
                } catch (IllegalStateException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                mMediaPlayer.start();
            }
        }).start();

    }
//获取系统默认铃声的Uri
private Uri getSystemDefultRingtoneUri() {
return RingtoneManager.getActualDefaultRingtoneUri(RemindActivity.this,
                RingtoneManager.TYPE_RINGTONE);
    }

}

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activity_main.xml内容:

<?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:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="siso.smartnotef.activity.MainActivity">

<RelativeLayout
 android:layout_width="match_parent"
android:layout_height="50dp"
android:background="@color/title_color"
android:paddingLeft="10dp"
android:paddingRight="10dp">
<TextView
 android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@color/white"
android:textSize="18sp"
android:layout_centerInParent="true"
android:text="智能记事本"/>
<TextView
 android:id="@+id/tv_add"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@color/white"
android:text="新增"
android:layout_centerVertical="true"
android:layout_alignParentRight="true"
android:textSize="13sp"/>
</RelativeLayout>
<ListView
 android:id="@+id/lv_content"
android:layout_width="match_parent"
android:layout_height="wrap_content"></ListView>
</LinearLayout>

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activity_add_content.xml内容:

<?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:id="@+id/activity_add_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="siso.smartnotef.activity.AddContentActivity">
<RelativeLayout
 android:layout_width="match_parent"
android:layout_height="50dp"
android:background="@color/title_color"
android:paddingLeft="10dp"
android:paddingRight="10dp">
<TextView
 android:id="@+id/tv_cancel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:text="取消"
android:textColor="@color/white"/>
<TextView
 android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@color/white"
android:textSize="18sp"
android:layout_centerInParent="true"
android:text="智能记事本"/>
<TextView
 android:id="@+id/tv_save"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="@color/white"
android:text="保存"
android:layout_centerVertical="true"
android:layout_alignParentRight="true"
 />
</RelativeLayout>
<LinearLayout
 android:layout_marginTop="10dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_gravity="center_horizontal">
<TextView
 android:id="@+id/tv_date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp"
android:text="今天"/>
<TextView
 android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=" -- "/>
<TextView
 android:id="@+id/tv_time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="5dp"
android:text="请选择时间"
 />
</LinearLayout>
<EditText
 android:id="@+id/et_content"
android:layout_marginTop="10dp"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:inputType="textMultiLine"
android:gravity="left|top"
android:layout_margin="20dp"
android:padding="10dp"
android:hint="请输入内容"
android:background="@drawable/edit_back"/>
</LinearLayout>

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activity_remind.xml内容:

<?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:background="@color/white"
android:orientation="vertical"
tools:context="siso.smartnotef.activity.RemindActivity">

<TextView
 android:id="@+id/tv_content"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal" />

<Button
 android:id="@+id/bt_confirm"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="取消" />
</LinearLayout>

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AndroidManifest.xml内容:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="siso.smartnotef">
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

<application
 android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/Theme.AppCompat.Light.NoActionBar">

<activity
 android:name=".activity.MainActivity"
android:theme="@style/Theme.AppCompat.Light.NoActionBar">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

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

<receiver android:name=".receiver.MainReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>

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

<service
 android:name=".service.MainService"
android:enabled="true"
android:exported="true" />

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


</application>

</manifest>

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项目结构如图:

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项目运行结果如图:

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