我从Angular 2收到此错误
core.umd.js:5995 EXCEPTION:未捕获(在承诺中):错误:app/model_exposure_currencies/model_exposure_currencies.component.html:57:18中的错误:如果在表单标记中使用了ngModel,则name属性必须为set或表单控件必须在ngModelOptions中定义为"standalone".
Example 1: <input [(ngModel)]="person.firstName" name="first">
Example 2: <input [(ngModel)]="person.firstName" [ngModelOptions]="{standalone: true}">
<td *ngFor="let lag of ce.lags">
<div class="form-group1">
<input name="name" [(ngModel)]="lag.name" [ngModelOptions]="{standalone: true}" class="form-control" pattern="[0-9]*(\.[0-9]+)?" required>
</div>
</td>
这就是我使用表单标签的方式:
<form #f="ngForm" (ngSubmit)="onSubmit()">
我试图从Java方法返回2个值但我得到这些错误.这是我的代码:
// Method code
public static int something(){
int number1 = 1;
int number2 = 2;
return number1, number2;
}
// Main method code
public static void main(String[] args) {
something();
System.out.println(number1 + number2);
}
错误:
Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - missing return statement
at assignment.Main.something(Main.java:86)
at assignment.Main.main(Main.java:53)
Java结果:1
我下载了新发布的Xcode 9.3,我重新编译了我的工作区,我注意到它生成了一个新文件:
<mywsname>.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist
其内容是:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>IDEDidComputeMac32BitWarning</key>
<true/>
</dict>
</plist>
我想知道这个文件是否应该被git忽略或提交.我无法找到任何有关它的文档.
在我的应用程序中,我从库中上传图像,我想将此图像存储在SQLite数据库中.如何在数据库中存储位图？我正在将位图转换为字符串并将其保存在数据库中.从数据库中检索它时,我无法将该字符串分配给ImageView,因为它是一个字符串.
Imageupload12 .java:
public class Imageupload12 extends Activity {
Button buttonLoadImage;
ImageView targetImage;
int i = 0;
Database database = new Database(this);
String i1;
String img;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main5);
buttonLoadImage = (Button) findViewById(R.id.loadimage);
targetImage = (ImageView) findViewById(R.id.targetimage);
Bundle b = getIntent().getExtras();
if (b != null) {
img = b.getString("image");
targetImage2.setImageURI("image");
//i am getting error as i cant assign string to imageview.
}
buttonLoadImage.setOnClickListener(new Button.OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub …我开始创建一个Firebase数据库.
我正在尝试为一个班级建模.一个非常简单的课程:
package com.glups.model;
import com.google.firebase.database.IgnoreExtraProperties;
@IgnoreExtraProperties
public class AlumnoFB {
private String nombre;
private String apellidos;
private String telefono;
private String email;
private Boolean tieneWhatsapp;
private Boolean tieneTelegram;
private Boolean tieneHangouts;
private Long formaPago;
private Double ratioHora;
private Double precioHora;
private Double horasCompensadas;
public AlumnoFB() {
// Default constructor required for calls to DataSnapshot.getValue(User.class)
}
public AlumnoFB(String nombre,
String apellidos,
String telefono,
String email,
Boolean tieneWhatsapp,
Boolean tieneTelegram,
Boolean tieneHangouts,
Long formaPago,
Double ratioHora,
Double precioHora,
Double horasCompensadas) { …作为我正在创建的HTML表单的一部分,我希望有一个下拉列表,它将列出我的数据库中的所有用户名.
我认为下面的代码可以解决问题,但是下拉列表是空的 - 有人可以协助我做错了什么吗？谢谢.
<tr>
<td>Owner</td>
<td>
<select name="owner">
<?php
$sql = mysqli_query($connection, "SELECT username FROM users");
while ($row = $sql->fetch_assoc()){
?>
<option value="owner1"><?php echo $row['username']; ?></option>
<?php
// close while loop
}
?>
</td>
</tr>
我有一个可以制作图片并上传它们的应用程序.上传需要照片的文件路径,但我无法得到它.
这是我的代码:
public void maakfoto (View v) {
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, mImageCaptureUri);
startActivityForResult(cameraIntent, CAMERA_REQUEST);
}
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
Bitmap photo = (Bitmap) data.getExtras().get("data");
imageView.setImageBitmap(photo);
knop.setVisibility(Button.VISIBLE);
System.out.println(mImageCaptureUri);
}
}
请帮我看一下文件路径.
谢谢
我有一个可排序的JTable设置来使用自定义扩展AbstractTableModel.但是,这个表的某些行为是我的预期,我希望得到一些关于如何解决这个问题的建议.
我将JTable设置为可排序使用:
thisJTable.setAutoCreateRowSorter(true);
这允许我按预期单击列标题对表进行排序.
但是,我发现当我通过单击列标题对表进行排序时,我的行的格式(背景和前景色)也没有排序.
我根据它们包含的值设置了这些行的颜色编码.当我按列标题排序时,给定行NUMBER的格式保持不变(尽管之前在该行中的内容已移动).
通过覆盖prepareRendererJTable 的默认调用来设置行的颜色:
thisTable = new JTable(thisModel){
//Set up custom rendering - Sets background color of row to correct value
public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
Component c = super.prepareRenderer(renderer, row, column);
CustTableModel thisModel = (CustTableModel) getModel();
c.setBackground(thisModel.getRowBackgroundColor(row));
c.setForeground(thisModel.getRowForeColor(row));
return c;
}
};
有没有更好/不同的方法来解决这个问题？
我是否应该使用不同的方法来进行渲染,这种方法可以在排序中更新JTable的渲染？
或者我是否想要编写自己的排序方法？
解决方案(谢谢mKorbel!)
我以为我会发布我的解决方案,因为我不得不玩这个,因为我不确定新索引是否也会传递给prepareRenderer.
thisTable = new JTable(thisModel){
//Set up custom rendering - Sets background color of row to correct value
public …在我的主要活动中有一个按钮.在它的onclick监听器我调用功能来设置闹钟.警报正在工作,但我无法阻止它.可以帮助我一些人
MainActivity.java
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewById(R.id.button1).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
setalarm();
}
});
}
private void setalarm() {
Calendar cal=Calendar.getInstance();
// cal.set(Calendar.MONTH,6);
// cal.set(Calendar.YEAR,2013);
// cal.set(Calendar.DAY_OF_MONTH,12);
cal.set(Calendar.HOUR_OF_DAY,18);
cal.set(Calendar.MINUTE,32);
Intent intent = new Intent(this, Mote.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this.getApplicationContext(), 1253, intent, PendingIntent.FLAG_UPDATE_CURRENT| Intent.FILL_IN_DATA);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),pendingIntent );
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pendingIntent);
Toast.makeText(this, "Alarm SET.", Toast.LENGTH_LONG).show();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) { …实际上,我不知道为什么会出现这个错误.
遵循代码,希望有一切对诊断有用.
应用程序的结构是Navigation Drawer Activity一个Fragment内部标准.该Fragment有RecyclerView.
使用的设备是Motorola XT1068(Android 6.0,API 23).
logcat的
03-26 16:07:54.340 20272-20272/com.example.ves.gennaio3 E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.ves.gennaio3, PID: 20272
android.content.res.Resources$NotFoundException: Resource ID #0x7f07006e
at android.content.res.Resources.getValue(Resources.java:1351)
at android.support.v7.widget.AppCompatDrawableManager.loadDrawableFromDelegates(AppCompatDrawableManager.java:330)
at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:195)
at android.support.v7.widget.AppCompatDrawableManager.getDrawable(AppCompatDrawableManager.java:188)
at android.support.v7.content.res.AppCompatResources.getDrawable(AppCompatResources.java:100)
at android.support.v7.widget.AppCompatImageHelper.setImageResource(AppCompatImageHelper.java:85)
at android.support.v7.widget.AppCompatImageView.setImageResource(AppCompatImageView.java:94)
at com.example.ves.gennaio3.models.RecyclerViewAdapter.onBindViewHolder(RecyclerViewAdapter.java:38)
at com.example.ves.gennaio3.models.RecyclerViewAdapter.onBindViewHolder(RecyclerViewAdapter.java:17)
at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6482)
at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6515)
at android.support.v7.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5458)
at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5724)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5563)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5559)
at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2229)
at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1556)
at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1516)
at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:608)
at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3693)
at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3410)
at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3962)
at …