android - 搜索栏更改文本大小

Question

我想使用搜索栏更改编辑文本的文本大小，每次关闭活动并重新打开它时，搜索栏都会自动增加文本大小，这是代码：

package com.e_orthodoxy.orthodox_prayers;
    
public class WakeupActivity extends Activity {

    private SharedPreferences prefs;
    private SeekBar seekbar;
    private EditText edittext;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_wakeup);
        
        seekbar = (SeekBar) findViewById(R.id.seekBar1);
        edittext = (EditText) findViewById(R.id.id_wakeup_txt);
        
        prefs = getPreferences(MODE_PRIVATE);
        
        float fs = prefs.getFloat("fontsize", 12);
        seekbar.setProgress((int)fs);
        edittext.setTextSize(seekbar.getProgress());
        

        seekbar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
            
            @Override
            public void onStopTrackingTouch(SeekBar seekBar){
                prefs = getPreferences(MODE_PRIVATE);
                SharedPreferences.Editor ed = prefs.edit();
                ed.putFloat("fontsize", edittext.getTextSize());
                ed.commit();    
            }
            @Override
            public void onStartTrackingTouch(SeekBar seekBar){
                
            }
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress,
                    boolean fromUser){
                edittext.setTextSize(progress);
            }
        });
        
        
    }
    
    
    @Override
    public void onBackPressed() {
        
        Intent intent_wakeup_back = new Intent (WakeupActivity.this, DailyPrayersActivity.class);
        startActivity(intent_wakeup_back);
        finish();
    }   
}

Answer 1

将 setTextSize(float size) 替换为 setTextSize(int unit,float size) 并使用 TypedValue.COMPLEX_UNIT_PX 作为单位

float fs = prefs.getFloat("fontsize", 12);
seekbar.setProgress((int)fs);
//edittext.setTextSize(seekbar.getProgress());
edittext.setTextSize(TypedValue.COMPLEX_UNIT_PX,seekbar.getProgress());

不要忘记onProgressChanged：

 //edittext.setTextSize(progress);
 edittext.setTextSize(TypedValue.COMPLEX_UNIT_PX,progress);

Answer 2

所有代码都写在您的方法中onCreate()并遵循类型转换（TextView 和 SeekBar）：

SeekBar seekBar =(SeekBar)findViewById(R.id.seekbar);
        SharedPreferences prefs = getPreferences(MODE_PRIVATE);

float fs = prefs.getFloat("fontsize", 12);
seekBar.setProgress((int)fs);
textView.setTextSize(TypedValue.COMPLEX_UNIT_PX,seekBar.getProgress());

seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
    @Override
    public void onProgressChanged(SeekBar seekBar, int i, boolean b) {
        textView.setTextSize(TypedValue.COMPLEX_UNIT_PX,seekBar.getProgress());
    }

    @Override
    public void onStartTrackingTouch(SeekBar seekBar) {

    }

    @Override
    public void onStopTrackingTouch(SeekBar seekBar) {
        SharedPreferences prefs = getPreferences(MODE_PRIVATE);
        SharedPreferences.Editor ed = prefs.edit();
        ed.putFloat("fontsize", textView.getTextSize());
        ed.commit();
    }
});