问题
It's the first time I post on this forum, hope it's gonna be fine :)
I'm developping an Android App for public transportation in my city.
Here is what I have
[ |short destination ||next departure| ]
[ |way too long dest...||next departure| ]
Here is what I want:
[ |short destination||next departure| ]
[ |way too long dest...||next departure| ]
Here is a more complete example: s28.postimg.org/5gejnvfd9/actual2.png
Weird coloured backgrounds are just here to easily identify layouts/textviews. You can also ignore the brown line (which is ok).
Basically, I want to have the destination [red background] which have a variable length, and on its right, I want the first departure time [green background]. Everything on one line.
I need to always have the first departure information fully displayed (nowrap). The destination could be wrapped with an ellipsis (...). [Optional question, how to replace the ellipsis '...' with '.' ?]
Here is the best working code I have so far:
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content">
<TextView
android:id="@+id/txtTitleDestination"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_toLeftOf="@+id/txtTitleFirstDeparture"
android:background="#FF0000"
android:ellipsize="end"
android:maxLines="1"
android:padding="0dp"
android:scrollHorizontally="true"
android:textSize="18sp"
android:textStyle="bold" />
<TextView
android:id="@+id/txtTitleFirstDeparture"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="0dp"
android:layout_marginRight="0dp"
android:layout_alignParentRight="true"
android:background="#00FF00"
android:ellipsize="none"
android:maxLines="1"
android:padding="0dp"
android:textSize="18sp"
android:textStyle="bold"
/>
</RelativeLayout>
I've tried TableLayout and LinearLayour instead of the RelativeLayout, but with no success :(
Any idea how I could do that?
Thanks in advance!
Louloox
[SOLVED] Just have to lightly modify the valbertos answer:
titleDestination.post(new Runnable() {
@Override
public void run() {
int widthTextViewDeparture = measureTextWidthTextView(titleFirstTime, pContext);
int widthTextViewDestination = titleDestination.getWidth();
int widthTextViewParent = rl_parent.getWidth();
if(widthTextViewDestination + widthTextViewDeparture > widthTextViewParent) {
titleDestination.setWidth(widthTextViewParent - widthTextViewDeparture);
titleDestination.setEllipsize(TruncateAt.END);
titleDestination.setHorizontallyScrolling(true);
}
}
});
Setting the Ellipsis only if necessary makes the text properly truncated.
Before:
Lingolsheim Thiergaten --> Lingolsheim... [1'23"] 21h23
With the modification:
Lingolsheim Thiergaten --> Lingolsheim Thi... [1'23"] 21h23
Thanks again :)
回答1:
To do what you are asking for, you must adjust the width of the first view dynamically based on the text width of the second view.
//Code
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test);
final TextView tv_1 = (TextView) findViewById(R.id.tv_1);
tv_1.post(new Runnable() {
@Override
public void run() {
View rl_parent = findViewById(R.id.rl_parent);
TextView tv_2 = (TextView) findViewById(R.id.tv_2);
int widthTextView2 = measureTextWidthTextView(tv_2);
if(tv_1.getWidth() + widthTextView2 > rl_parent.getWidth()) {
tv_1.setWidth(tv_1.getWidth() - widthTextView2);
}
}
});
}
private int measureTextWidthTextView(TextView textView) {
int widthMeasureSpec = View.MeasureSpec.makeMeasureSpec(getScreenWidth(), View.MeasureSpec.AT_MOST);
int heightMeasureSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
textView.measure(widthMeasureSpec, heightMeasureSpec);
return textView.getMeasuredWidth();
}
private int getScreenWidth() {
WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE);
Display display = wm.getDefaultDisplay();
Point size = new Point();
display.getSize(size);
return size.x;
}
//Layout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="300dp"
android:layout_height="match_parent"
android:orientation="vertical">
<RelativeLayout
android:id="@+id/rl_parent"
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="#348D63">
<TextView
android:id="@+id/tv_1"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="#BD160B"
android:gravity="center_vertical"
android:maxLines="1"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:text="Elsau Elsau Elsau Elsau Elsau Elsau Elsau"
android:textStyle="bold" />
<TextView
android:id="@+id/tv_2"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_toRightOf="@+id/tv_1"
android:gravity="center_vertical"
android:minWidth="50dp"
android:paddingLeft="10dp"
android:paddingRight="10dp"
android:text="[11:30 14:23]"
android:textStyle="bold" />
</RelativeLayout>
<!-- Rest of the layout -->
</LinearLayout>
Use android:maxLines="1" instead of android:singleLine="true" to get rid off the ugly dots -as I did in my example.
Also, I recommend you to use include for the "time" section, instead of repeating the TextViews twice. I’ve just done it like that to keep simple the example.
回答2:
I found a way to do it using Linear Layout, the trick is not to forget width="wrap_content" for the linearLayout, hope it can help.
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:orientation="horizontal">
<TextView
android:layout_width="0dip"
android:layout_height="wrap_content"
android:layout_weight="1"
android:ellipsize="end"
android:singleLine="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:singleLine="true" />
回答3:
Maybe you should use a LinearLayout instead of RelativeLayout and use the layout_weight attribute.
<LinearLayout android:orientation="horizontal" ...>
<TextView android:id="@+id/txtTitleDestination" android:layout_width="wrap_content" ... />
<TextView android:id="@+id/txtTitleFirstDeparture" android:layout_width="0dp" android:layout_weight="1" ... />
</LinearLayout>
回答4:
You don't need do it programmatically, ConstraintLayout is a magic!
Just use this code
app:layout_constraintHorizontal_bias="0" align view left
app:layout_constrainedWidth="true" to wrap left text
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="8dp">
<TextView
android:id="@+id/leftText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ellipsize="end"
android:maxLines="1"
app:layout_constrainedWidth="true"
app:layout_constraintHorizontal_bias="0"
app:layout_constraintEnd_toStartOf="@id/rightText"
app:layout_constraintHorizontal_chainStyle="packed"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:text="|short destination|" />
<TextView
android:id="@+id/rightText"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toEndOf="@+id/leftText"
app:layout_constraintTop_toTopOf="parent"
tools:text="|next departure|" />
</androidx.constraintlayout.widget.ConstraintLayout>
Here is result
来源：https://stackoverflow.com/questions/25701817/2-textviews-left-with-ellipsis-right-with-nowrap-single-line