[英]android - CountDownTimer within ProgressDialog
I would like to get counter, text and image in ProgressDialog. 我想在ProgressDialog中获得计数器,文本和图像。 I managed to get text & image but struggling with getting counter displayed. 我设法获得了文字和图像,但努力使计数器显示出来。 I would like to get something like this: 我想得到这样的东西:
so i am missing counter from above, can someone help please? 所以我从上面想念柜台,有人可以帮忙吗?
MainActivity.java MainActivity.java
TextView mTextView_timeCounter;
@Override
protected void onCreate (Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome_ah);
StorageSingleton.getInstance().setString(null, null);
progress = new ProgressDialog(this, R.layout.countdown);
progress.setCancelable(false);
//for displaying counter
mTextView_timeCounter = (TextView) findViewById(R.id.myTimerTextView);
progress = new ProgressDialog(this, R.layout.countdown);
progress.setCancelable(false);
progress.setIndeterminate(true);
progress.setIndeterminateDrawable(getResources().getDrawable(R.drawable.timer_logo));
new CountDownTimer(60000, 1000) {
public void onTick(long millisUntilFinished) {
long seconds = millisUntilFinished / 1000;
String countdown = String.format("%02d", seconds / 60) + ":" + String.format("%02d", seconds % 60);
progress.setMessage(countdown);
progress.setContentView(R.layout.countdown);
mTextView_timeCounter.setText(countdown);// <- this line causing error
}
public void onFinish() {
progress.dismiss();
}
}.start();
progress.show();
with error: 错误:
PID: 31908 java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
this is caused by line PID: 31908 java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
这是由行引起的
mTextView_timeCounter.setText(countdown);
but i don't know why. 但我不知道为什么。 please find code below 请在下面找到代码
Countdown.xml Countdown.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:clickable="false"
android:padding="30dp"
android:layout_margin="35dp"
android:orientation="vertical"
android:weightSum="1">
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Test in Progress..."
android:textColor="@color/sample12"
android:textSize="@dimen/header_text"
android:textStyle="bold"
android:textAlignment="center"
android:id="@+id/testInProgress"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_gravity="center_horizontal"/>
<ImageView
android:id="@+id/imageView4"
android:layout_width="260dp"
android:layout_height="260dp"
android:src="@drawable/timer_logo"
android:clickable="false"
android:contentDescription="hourglass"
android:layout_below="@+id/textView14"
android:layout_alignParentEnd="true"
/>
<TextView
android:layout_width="91dp"
android:layout_height="wrap_content"
android:id="@+id/myTimerTextView"
android:layout_gravity="center_horizontal"
android:layout_weight="0.10"
android:text=""/>
NullPointerException is thrown when an application attempts to use an object reference that has the null value . 当应用程序尝试使用具有null值的对象引用时,抛出NullPointerException。
You should pass View Object . 您应该传递View Object 。
progress.setContentView(R.layout.countdown);
mTextView_timeCounter = (TextView)progress.findViewById(R.id.myTimerTextView);
mTextView_timeCounter.setText(countdown);
Change to mTextView_timeCounter = (TextView) progress.findViewById(R.id.myTimerTextView);
更改为mTextView_timeCounter = (TextView) progress.findViewById(R.id.myTimerTextView);
You are find view in activity layout but textview in countdown 您可以在活动布局中找到视图,但是在倒数计时中找到textview
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