Android studio选择器与进度条
Be your bubble 人气:0日期选择器
public void onclick(View v){ Calendar calendar=Calendar.getInstance(); new DatePickerDialog( this, new DatePickerDialog.OnDateSetListener() { @Override public void onDateSet(DatePicker view, int year, int month, int dayOfMonth) { String text = "你选择了:" + year + "年" + (month + 1) + "月" + dayOfMonth + "日"; Toast.makeText( MainActivity.this, text, Toast.LENGTH_SHORT ).show(); } } ,calendar.get(Calendar.YEAR) ,calendar.get(Calendar.MONTH) ,calendar.get(Calendar.DAY_OF_MONTH)).show(); }
注意:此按钮响应需要在按钮布局文件里面加一句android:onClick="onclick"
时间选择器
ProgressDialog一般用于表示当前操作比较耗时间,让用户耐心等待
public void onclick(View v){ Calendar calendar=Calendar.getInstance(); new TimePickerDialog( this, new TimePickerDialog.OnTimeSetListener() { @Override public void onTimeSet(TimePicker view, int hourOfDay, int minute) { String text="你选择了"+hourOfDay+"时"+minute+"分"; Toast.makeText( MainActivity.this, text, Toast.LENGTH_SHORT ).show(); } } ,calendar.get(Calendar.HOUR_OF_DAY) ,calendar.get(Calendar.MINUTE),true).show(); }
进度条
1、圆圈
.xml:
<?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="vertical"> <Button android:id="@+id/but" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="跳转" android:onClick="onclick"/> </LinearLayout>
.java:
package com.example.catalogin; import android.app.ProgressDialog; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } ProgressDialog pd; public void showprogress(){ pd=new ProgressDialog(this); pd.setTitle( "任务进行中" ); pd.setMessage( "请稍后..." ); pd.setCancelable( true ); pd.setProgressStyle( ProgressDialog.STYLE_SPINNER ); pd.show(); } public void onclick(View v){//按钮的一种方法 showprogress(); } }
做一个小练习来模拟一下(可用在刷新列表啥的)
.java代码改为:
package com.example.catalogin; import android.app.ProgressDialog; import android.os.Handler; import android.os.Message; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } ProgressDialog pd; public void showprogress(){ pd=new ProgressDialog(this); pd.setTitle( "任务进行中" ); pd.setMessage( "请稍后..." ); pd.setCancelable( true ); pd.setProgressStyle( ProgressDialog.STYLE_SPINNER ); pd.show(); } Handler handler=new Handler( ){ @Override public void handleMessage(Message msg) {//在主线程(UI) pd.dismiss();//发送完关闭 } }; public void onclick(View v){ showprogress(); //新建一个子线程 new Thread(){//new Thread 说明并行进行,在小路跑 public void run(){ for(int i=0;i<=3;i++){ try{ Thread.sleep( 1000 ); } catch (InterruptedException e) { e.printStackTrace(); } } handler.sendEmptyMessage( 0 );//向主干道发送消息,子线程 } }.start(); } }
效果为自己跑完三秒之后就自动消失
2、水平
.java 文件代码改为:
package com.example.catalogin; import android.app.ProgressDialog; import android.os.Handler; import android.os.Message; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } ProgressDialog pd; public void showprogress(){ pd=new ProgressDialog(this); pd.setTitle( "任务进行中" ); pd.setMessage( "请稍后..." ); pd.setCancelable( true ); pd.setProgressStyle( ProgressDialog.STYLE_HORIZONTAL);//风格 pd.setMax(100);//下载数量啥的 pd.show(); } Handler handler=new Handler( ){//接收 @Override public void handleMessage(Message msg) {//在主线程(UI) if(msg.what==0)//接受的信息判断,0结束 pd.dismiss();//发送完关闭 else if( msg.what==1){ pd.setProgress( msg.arg1 );//接受的信息判断如果是1,说明进度没结束,加一 } } }; public void onclick(View v){ showprogress(); //新建一个子线程 new Thread(){//new Thread 说明并行进行,在小路跑 public void run(){ for(int i=0;i<=100;i++){ try{ Thread.sleep( 100 ); } catch (InterruptedException e) { e.printStackTrace(); } Message mag=Message.obtain(); mag.arg1=i;//增长的进度丢进去 mag.what=1;//中间发送消息都是一,直到0结束,所以不结束 handler.sendMessage( mag );//增长的信息每次发送一次 } handler.sendEmptyMessage( 0 );//向主干道发送消息,子线程 } }.start(); } }
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