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package tw.kaneshih.view; | |
import android.content.Context; | |
import android.support.annotation.DrawableRes; | |
import android.support.annotation.StringRes; | |
import android.util.AttributeSet; | |
import android.view.LayoutInflater; | |
import android.view.View; | |
import android.widget.ImageView; | |
import android.widget.LinearLayout; | |
import android.widget.TextView; | |
import tw.kaneshih.app.R; | |
public final class ExpandableTextView extends LinearLayout { | |
private TextView content; | |
private View button; | |
private TextView buttonText; | |
private ImageView buttonImage; | |
private boolean isExpanded = false; | |
private int collapsedLines = 2; | |
private int drawableIdForExpand = R.drawable.ic_introduction_closed; | |
private int drawableIdForCollapse = R.drawable.ic_introduction_open; | |
private int stringIdForExpand = R.string.show_less; | |
private int stringIdForCollapse = R.string.show_more; | |
public ExpandableTextView(Context context) { | |
super(context); | |
initLayout(context); | |
} | |
public ExpandableTextView(Context context, AttributeSet attrs) { | |
super(context, attrs); | |
initLayout(context); | |
} | |
public ExpandableTextView(Context context, AttributeSet attrs, int defStyleAttr) { | |
super(context, attrs, defStyleAttr); | |
initLayout(context); | |
} | |
private void initLayout(Context context) { | |
LayoutInflater.from(context).inflate(R.layout.expandable_textview, this); | |
content = (TextView) findViewById(R.id.expandable_textview_text); | |
button = findViewById(R.id.expandable_textview_button); | |
buttonText = (TextView) findViewById(R.id.expandable_textview_button_text); | |
buttonImage = (ImageView) findViewById(R.id.expandable_textview_button_image); | |
button.setOnClickListener(new OnClickListener() { | |
@Override | |
public void onClick(View v) { | |
if (isExpanded) { | |
content.setMaxLines(collapsedLines); | |
buttonText.setText(stringIdForCollapse); | |
buttonImage.setImageResource(drawableIdForCollapse); | |
} else { | |
content.setMaxLines(Integer.MAX_VALUE); | |
buttonText.setText(stringIdForExpand); | |
buttonImage.setImageResource(drawableIdForExpand); | |
} | |
isExpanded = !isExpanded; | |
content.scrollTo(0, 0); | |
} | |
}); | |
} | |
public void setText(String text) { | |
content.setText(text); | |
} | |
/** | |
* How many lines to show while this is collapsed? | |
* | |
* @param collapsedLines | |
* - default is 2 | |
*/ | |
public void setCollapsedLines(int collapsedLines) { | |
this.collapsedLines = collapsedLines; | |
} | |
public TextView getContentTextView() { | |
return content; | |
} | |
/** | |
* the arrow which at right side of button text | |
* | |
* @param forCollapse | |
* @param forExpand | |
*/ | |
public void setResourceDrawableForButtonIndicator(@DrawableRes int forCollapse, @DrawableRes int forExpand) { | |
this.drawableIdForCollapse = forCollapse; | |
this.drawableIdForExpand = forExpand; | |
} | |
public void setResourceStringForButtonText(@StringRes int forCollapse, @StringRes int forExpand) { | |
this.stringIdForCollapse = forCollapse; | |
this.stringIdForExpand = forExpand; | |
} | |
public boolean isExpanded() { | |
return isExpanded; | |
} | |
} | |
/* XML R.layout.expandable_textview | |
<?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"> | |
<TextView | |
android:id="@+id/expandable_textview_text" | |
android:layout_width="match_parent" | |
android:layout_height="wrap_content" | |
android:ellipsize="end" | |
android:maxLines="2" | |
android:textColor="@color/expandable_textview_text" | |
android:textSize="@dimen/expandable_textview_textsize" | |
android:textStyle="bold"/> | |
<LinearLayout | |
android:id="@+id/expandable_textview_button" | |
android:layout_width="match_parent" | |
android:layout_height="@dimen/expandable_textview_button_height" | |
android:background="@drawable/bg_expandable_textview_button" | |
android:clickable="true" | |
android:gravity="center" | |
android:orientation="horizontal"> | |
<TextView | |
android:id="@+id/expandable_textview_button_text" | |
android:layout_width="wrap_content" | |
android:layout_height="wrap_content" | |
android:layout_marginRight="@dimen/expandable_textview_button_text_margin_right" | |
android:text="@string/show_more" | |
android:textColor="@color/expandable_textview_button_text" | |
android:textSize="@dimen/expandable_textview_button_textsize" | |
android:textStyle="bold"/> | |
<ImageView | |
android:id="@+id/expandable_textview_button_image" | |
android:layout_width="wrap_content" | |
android:layout_height="wrap_content" | |
android:src="@drawable/ic_introduction_open"/> | |
</LinearLayout> | |
</LinearLayout> | |
*/ |
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