我有一个带有不同框的布局,每个框都包含一堆类似布局的TextView。
我希望使用TextView的自动大小功能,但每个TextView只考虑其自己的边界,并且无法在表示布局中类似元素的多个自动大小TextView上强制执行相同的大小。
理想情况下,我希望能够“链接”多个TextView对象(位于完全不同的位置),因此自动大小机制知道它们应该都具有相同的文本大小(坚持最小,因为一个文本可以更长比其他人)。
更新:
我已根据您的要求开发了尺寸感知TextView。它会在文本大小发生变化时通知侦听器。我测试了它,效果很好。我希望它对你有所帮助。
size aware TextView.Java:
package com.aminography.textapp;
import android.content.Context;
import android.support.v7.widget.AppCompatTextView;
import android.util.AttributeSet;
public class SizeAwareTextView extends AppCompatTextView {
private OnTextSizeChangedListener mOnTextSizeChangedListener;
private float mLastTextSize;
public SizeAwareTextView(Context context) {
super(context);
mLastTextSize = getTextSize();
}
public SizeAwareTextView(Context context, AttributeSet attrs) {
super(context, attrs);
mLastTextSize = getTextSize();
}
public SizeAwareTextView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mLastTextSize = getTextSize();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mLastTextSize != getTextSize()) {
mLastTextSize = getTextSize();
if (mOnTextSizeChangedListener != null) {
mOnTextSizeChangedListener.onTextSizeChanged(this, mLastTextSize);
}
}
}
public void setOnTextSizeChangedListener(OnTextSizeChangedListener onTextSizeChangedListener) {
mOnTextSizeChangedListener = onTextSizeChangedListener;
}
public interface OnTextSizeChangedListener {
void onTextSizeChanged(SizeAwareTextView view, float textSize);
}
}
main activity.Java
package com.aminography.textapp;
import android.annotation.SuppressLint;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.TypedValue;
import android.widget.EditText;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final SizeAwareTextView textView1 = findViewById(R.id.textView1);
final SizeAwareTextView textView2 = findViewById(R.id.textView2);
final SizeAwareTextView textView3 = findViewById(R.id.textView3);
final List<SizeAwareTextView> textViewList = new ArrayList<>();
textViewList.add(textView1);
textViewList.add(textView2);
textViewList.add(textView3);
SizeAwareTextView.OnTextSizeChangedListener onTextSizeChangedListener = new SizeAwareTextView.OnTextSizeChangedListener() {
@SuppressLint("RestrictedApi")
@Override
public void onTextSizeChanged(SizeAwareTextView view, float textSize) {
for (SizeAwareTextView textView : textViewList) {
if (!textView.equals(view) && textView.getTextSize() != view.getTextSize()) {
textView.setAutoSizeTextTypeUniformWithPresetSizes(new int[]{(int) textSize}, TypedValue.COMPLEX_UNIT_PX);
}
}
}
};
for (SizeAwareTextView textView : textViewList) {
textView.setOnTextSizeChangedListener(onTextSizeChangedListener);
}
((EditText) findViewById(R.id.editText)).addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
textView1.setText(editable.toString());
}
});
}
}
activity_main.xml中:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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="match_parent"
android:gravity="top"
android:orientation="vertical"
android:padding="16dp"
tools:context=".MainActivity">
<com.aminography.textapp.SizeAwareTextView
android:id="@+id/textView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#DEDEDE"
android:text="Here is the first TextView"
android:textSize="26sp"
app:autoSizeMinTextSize="10sp"
app:autoSizeStepGranularity="0.5sp"
app:autoSizeTextType="uniform" />
<com.aminography.textapp.SizeAwareTextView
android:id="@+id/textView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:background="#DEDEDE"
android:text="Here is the second TextView"
android:textSize="26sp"
app:autoSizeMinTextSize="10sp"
app:autoSizeStepGranularity="0.5sp"
app:autoSizeTextType="uniform" />
<com.aminography.textapp.SizeAwareTextView
android:id="@+id/textView3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:background="#DEDEDE"
android:text="Here is the third TextView"
android:textSize="26sp"
app:autoSizeMinTextSize="10sp"
app:autoSizeStepGranularity="0.5sp"
app:autoSizeTextType="uniform" />
<android.support.v7.widget.AppCompatEditText
android:id="@+id/editText"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="32dp"
android:text="Here is the first TextView" />
</LinearLayout>
最后结果:
这与OP可能一直在寻找的有点不同(我认为),但是我需要的是包含多个TextView对象的特定视图,一旦确定布局具有最小TextView的大小所有TextView的大小。所以我这样做并把它放在我的TextViews所在的片段的OnViewCreated()方法中:
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
view.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
Timber.d("Lifecycle: In onViewCreated() of WelcomeFragment adjusting text fields");
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
view.getViewTreeObserver().removeOnGlobalLayoutListener(this);
} else {
//noinspection deprecation
view.getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
// Get all text views and find the smallest size and set them all to that
int childCount = ((ViewGroup)view).getChildCount();
float f = -1;
ArrayList<AppCompatTextView> textViewArrayList = new ArrayList();
for (int x = 0; x < childCount; x++) {
View v = ((ViewGroup) view).getChildAt(x);
if ( v instanceof androidx.appcompat.widget.AppCompatTextView) {
textViewArrayList.add((androidx.appcompat.widget.AppCompatTextView)v);
if ( f == -1) {
// Handle edge case - first TextView found initializes f
f = Math.max(f, ((androidx.appcompat.widget.AppCompatTextView) v).getTextSize());
} else {
f = Math.min(f, ((androidx.appcompat.widget.AppCompatTextView) v).getTextSize());
}
}
}
int[] uniformSize = new int[]{(int) f};
for (int x = 0; x < textViewArrayList.size(); x++) {
TextViewCompat.setAutoSizeTextTypeUniformWithPresetSizes(textViewArrayList.get(x), uniformSize, TypedValue.COMPLEX_UNIT_PX);
}
}
});
}