今天学习了页面显示和闹钟的设定。
使用list view显示数据。闹钟仍在研究中。
public class MainActivity extends AppCompatActivity {
@SuppressLint("MissingInflatedId")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RadioButton rbYes = findViewById(R.id.rb_yes);
RadioButton rbNo = findViewById(R.id.rb_no);
rbYes.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startRemind();
}
});
rbNo.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
stopRemind();
}
});
}
/**
* 开启提醒
*/
private void startRemind(){
//得到日历实例，主要是为了下面的获取时间
Calendar mCalendar = Calendar.getInstance();
mCalendar.setTimeInMillis(System.currentTimeMillis());
//获取当前毫秒值
long systemTime = System.currentTimeMillis();
//是设置日历的时间，主要是让日历的年月日和当前同步
mCalendar.setTimeInMillis(System.currentTimeMillis());
// 这里时区需要设置一下，不然可能个别手机会有8个小时的时间差
mCalendar.setTimeZone(TimeZone.getTimeZone("GMT+8"));
//设置在几点提醒 设置的为点
mCalendar.set(Calendar.HOUR_OF_DAY, 14);
//设置在几分提醒 设置的为分
mCalendar.set(Calendar.MINUTE, 46);
//下面这两个看字面意思也知道
mCalendar.set(Calendar.SECOND, 0);
mCalendar.set(Calendar.MILLISECOND, 0);
//上面设置的就是13点25分的时间点
//获取上面设置的13点25分的毫秒值
long selectTime = mCalendar.getTimeInMillis();
// 如果当前时间大于设置的时间，那么就从第二天的设定时间开始
if(systemTime > selectTime) {
mCalendar.add(Calendar.DAY_OF_MONTH, 1);
}
//AlarmReceiver.class为广播接受者
Intent intent = new Intent(MainActivity.this, AlarmReceiver.class);
PendingIntent pi = PendingIntent.getBroadcast(MainActivity.this, 0, intent, 0);
//得到AlarmManager实例
AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
//**********注意！！下面的两个根据实际需求任选其一即可*********
/**
* 单次提醒
* mCalendar.getTimeInMillis() 上面设置的13点25分的时间点毫秒值
*/
am.set(AlarmManager.RTC_WAKEUP, mCalendar.getTimeInMillis(), pi);
/**
* 重复提醒
* 第一个参数是警报类型；下面有介绍
* 第二个参数网上说法不一，很多都是说的是延迟多少毫秒执行这个闹钟，但是我用的刷了MIUI的三星手机的实际效果是与单次提醒的参数一样，即设置的13点25分的时间点毫秒值
* 第三个参数是重复周期，也就是下次提醒的间隔 毫秒值 我这里是一天后提醒
*/
am.setRepeating(AlarmManager.RTC_WAKEUP, mCalendar.getTimeInMillis(), (1000 * 60 ), pi);
}
/**
* 关闭提醒
*/
private void stopRemind(){
Intent intent = new Intent(MainActivity.this, AlarmReceiver.class);
PendingIntent pi = PendingIntent.getBroadcast(MainActivity.this, 0,
intent, 0);
AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
//取消警报
am.cancel(pi);
Toast.makeText(this, "关闭了提醒", Toast.LENGTH_SHORT).show();
}
页面显示：
public class Seesome extends AppCompatActivity {
private SimpleCursorAdapter mAdapter;
private ListView listView;
private Button btn_add;
private Button btn_delete;
private Button btn_back;
private EditText et_date;
private EditText et_gj;
private EditText et_zj;
private EditText et_jc;
private EditText et_max;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_seesome);
btn_add = (Button) findViewById(R.id.btn_add);
btn_delete = (Button) findViewById(R.id.btn_delete);
listView = (ListView) findViewById(R.id.list);
btn_add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
addData();
refleshListView();
}
});
btn_delete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
deleteData();
refleshListView();
}
});
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// Toast.makeText(MainActivity.this,""+position,Toast.LENGTH_SHORT).show();
int positions = position + 1;
Help db = new Help(Seesome.this);
SQLiteDatabase dbWrite = db.getWritableDatabase();
dbWrite.delete("daka","_id=?",new String[]{""+positions});
dbWrite.close();
refleshListView();
}
});
}
<?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"
tools:context=".MainActivity">
<Button
android:id="@+id/btn_add"
android:text="显示信息"
android:textSize="20sp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<Button
android:id="@+id/btn_delete"
android:text="删除所有"
android:textSize="20sp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="@id/main_top"
android:padding="10dp"
android:divider="@null"
android:dividerHeight="6dp"
android:scrollbars="none"
android:background="@color/hui"/>
<Button
android:id="@+id/btn_back"
android:text="确定"
android:textSize="20sp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<TextView
android:id="@+id/tv_expense_date"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:textSize="20sp"
android:padding="10dp"></TextView>
<TextView
android:id="@+id/tv_expense_gj"
android:layout_width="70dp"
android:layout_height="35dp"
android:textSize="20sp"></TextView>
</LinearLayout>
标签：总结,每日,private,3.5,mCalendar,new,btn,void,View From： https://www.cnblogs.com/syhxx/p/17180694.html