Android 如何在运行时动态更改字体大小?
我有一个微调器,当我从微调器中选择值时,它的字体大小为14dp、16dp等 我想在运行时更改应用程序所有活动的文本视图中的字体大小。 这可能吗 我参考了几个答案,但对我不起作用 请尝试以下代码:Android 如何在运行时动态更改字体大小?,android,android-layout,android-studio,android-spinner,Android,Android Layout,Android Studio,Android Spinner,我有一个微调器,当我从微调器中选择值时,它的字体大小为14dp、16dp等 我想在运行时更改应用程序所有活动的文本视图中的字体大小。 这可能吗 我参考了几个答案,但对我不起作用 请尝试以下代码: package com.packegename; import android.app.Activity; import android.os.Bundle; import android.util.TypedValue; import android.view.View; import androi
package com.packegename;
import android.app.Activity;
import android.os.Bundle;
import android.util.TypedValue;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;
public class AndroidTextSize extends Activity {
String[] optUnit = {"COMPLEX_UNIT_DIP",
"COMPLEX_UNIT_IN",
"COMPLEX_UNIT_MM",
"COMPLEX_UNIT_PT",
"COMPLEX_UNIT_PX",
"COMPLEX_UNIT_SP"};
int[] valueUnit = { TypedValue.COMPLEX_UNIT_DIP,
TypedValue.COMPLEX_UNIT_IN,
TypedValue.COMPLEX_UNIT_MM,
TypedValue.COMPLEX_UNIT_PT,
TypedValue.COMPLEX_UNIT_PX,
TypedValue.COMPLEX_UNIT_SP};
String[] optSize ={"0.05", "0.1", "0.25", "0.5", "1", "4", "8", "10", "14", "16", "20", "30"};
float[] valueSize = {0.05f, 0.1f, 0.25f, 0.5f, 1f, 4f, 8f, 10f, 14f, 16f, 20f, 30f};
Spinner selUnit, selSize;
TextView textOut;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
selUnit = (Spinner)findViewById(R.id.selunit);
selSize = (Spinner)findViewById(R.id.selsize);
textOut = (TextView)findViewById(R.id.textout);
ArrayAdapter<String> adapterUnit = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, optUnit);
adapterUnit.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
selUnit.setAdapter(adapterUnit);
selUnit.setOnItemSelectedListener(selUnitOnItemSelectedListener);
ArrayAdapter<String> adapterSize = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, optSize);
adapterSize.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
selSize.setAdapter(adapterSize);
selSize.setOnItemSelectedListener(selSizeOnItemSelectedListener);
}
private Spinner.OnItemSelectedListener selUnitOnItemSelectedListener
= new Spinner.OnItemSelectedListener(){
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
updateTextSize();
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}};
private Spinner.OnItemSelectedListener selSizeOnItemSelectedListener
= new Spinner.OnItemSelectedListener(){
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
updateTextSize();
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}};
private void updateTextSize(){
int unit = valueUnit[selUnit.getSelectedItemPosition()];
String strUnit = optUnit[selUnit.getSelectedItemPosition()];
float size = valueSize[selSize.getSelectedItemPosition()];
String strSize = optSize[selSize.getSelectedItemPosition()];
textOut.setTextSize(unit, size);
textOut.setText(strUnit + " : " + strSize);
}
}
任何其他布局视图都只需创建如上所述的方法
并将此函数用于应用程序的任何活动,如
private void setAllFontSizeOf(float theSize) {
TextVFontsize.updateTextView(textview, theSize);
TextFontSize.updateEditText(Edittext,theSize);
}
最后将此方法声明给特定的活动 请尝试以下代码:
package com.packegename;
import android.app.Activity;
import android.os.Bundle;
import android.util.TypedValue;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;
public class AndroidTextSize extends Activity {
String[] optUnit = {"COMPLEX_UNIT_DIP",
"COMPLEX_UNIT_IN",
"COMPLEX_UNIT_MM",
"COMPLEX_UNIT_PT",
"COMPLEX_UNIT_PX",
"COMPLEX_UNIT_SP"};
int[] valueUnit = { TypedValue.COMPLEX_UNIT_DIP,
TypedValue.COMPLEX_UNIT_IN,
TypedValue.COMPLEX_UNIT_MM,
TypedValue.COMPLEX_UNIT_PT,
TypedValue.COMPLEX_UNIT_PX,
TypedValue.COMPLEX_UNIT_SP};
String[] optSize ={"0.05", "0.1", "0.25", "0.5", "1", "4", "8", "10", "14", "16", "20", "30"};
float[] valueSize = {0.05f, 0.1f, 0.25f, 0.5f, 1f, 4f, 8f, 10f, 14f, 16f, 20f, 30f};
Spinner selUnit, selSize;
TextView textOut;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
selUnit = (Spinner)findViewById(R.id.selunit);
selSize = (Spinner)findViewById(R.id.selsize);
textOut = (TextView)findViewById(R.id.textout);
ArrayAdapter<String> adapterUnit = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, optUnit);
adapterUnit.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
selUnit.setAdapter(adapterUnit);
selUnit.setOnItemSelectedListener(selUnitOnItemSelectedListener);
ArrayAdapter<String> adapterSize = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, optSize);
adapterSize.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
selSize.setAdapter(adapterSize);
selSize.setOnItemSelectedListener(selSizeOnItemSelectedListener);
}
private Spinner.OnItemSelectedListener selUnitOnItemSelectedListener
= new Spinner.OnItemSelectedListener(){
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
updateTextSize();
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}};
private Spinner.OnItemSelectedListener selSizeOnItemSelectedListener
= new Spinner.OnItemSelectedListener(){
@Override
public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
updateTextSize();
}
@Override
public void onNothingSelected(AdapterView<?> arg0) {
// TODO Auto-generated method stub
}};
private void updateTextSize(){
int unit = valueUnit[selUnit.getSelectedItemPosition()];
String strUnit = optUnit[selUnit.getSelectedItemPosition()];
float size = valueSize[selSize.getSelectedItemPosition()];
String strSize = optSize[selSize.getSelectedItemPosition()];
textOut.setTextSize(unit, size);
textOut.setText(strUnit + " : " + strSize);
}
}
任何其他布局视图都只需创建如上所述的方法
并将此函数用于应用程序的任何活动,如
private void setAllFontSizeOf(float theSize) {
TextVFontsize.updateTextView(textview, theSize);
TextFontSize.updateEditText(Edittext,theSize);
}
最后将此方法声明给特定的活动 是否可以更改dp中的大小?是否可以更改dp中的大小?