使用 SharedPreferences Android 更改按钮颜色？

Question

我想使用 SharedPreferences 永久更改颜色，使用按钮完成。这是我的代码：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_gunawangsa);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    getSupportActionBar().setTitle("Gunawangsa Hotel");

    button1 = (Button) findViewById(R.id.gu_button);

    sharedPreferences = getSharedPreferences("ButtonDisable", Context.MODE_PRIVATE);

    final boolean isEnable = sharedPreferences.getBoolean("ButtonDisable", true);
    button1.setEnabled(isEnable);
    button1.setBackgroundColor(Color.RED);
    button1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            if (button1.isClickable()) {
                Toast.makeText(getBaseContext(),"Claim",
                        Toast.LENGTH_SHORT).show();
                boolean isEnable = sharedPreferences.edit().putBoolean("ButtonDisable", false).commit();
                if (isEnable == false) {
                    Toast.makeText(getBaseContext(),"Claim",
                            Toast.LENGTH_SHORT).show();
                } else {
                    button1.setBackgroundColor(Color.RED);
                }
            }


        }


    });

}

Answer 1

替换

boolean isEnable = sharedPreferences.edit().putBoolean("ButtonDisable", false).commit();

和

boolean isEnable = sharedPreferences.getBoolean("ButtonDisable", false);
sharedPreferences.edit().putBoolean("ButtonDisable",boolValue).apply();

Answer 2

好吧，你这样做：

button1.setBackgroundColor(Color.RED);

不管 'isEnable' 的值是多少。

尝试

button1.setBackgroundColor(isEnable ? Color.RED : Color.WHITE);

Answer 3

试试这个：

import android.content.Context;
import android.content.SharedPreferences;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;


public class GunawangsaActivity extends AppCompatActivity {

    Button button1;

    boolean isEnable;

    SharedPreferences sharedPreferences;
    SharedPreferences.Editor editor;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_gunawangsa);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        getSupportActionBar().setTitle("Gunawangsa Hotel");

        button1 = (Button) findViewById(R.id.gu_button);

        sharedPreferences = getSharedPreferences("ButtonDisable", Context.MODE_PRIVATE);
        editor = sharedPreferences.edit();

        isEnable = sharedPreferences.getBoolean("ButtonDisable", true);

        if (isEnable) {
            button1.setEnabled(true);
            button1.setBackgroundColor(Color.RED);
        } else {
            button1.setEnabled(false);
            button1.setBackgroundColor(Color.GRAY);
        }

        button1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Toast.makeText(getBaseContext(),"Claim", Toast.LENGTH_SHORT).show();

                editor.putBoolean("ButtonDisable", false);
                editor.commit();

                button1.setEnabled(false);
                button1.setBackgroundColor(Color.GRAY);
            }
        });
    }
}

输出：

希望对你有所帮助~

使用 SharedPreferences Android 更改按钮颜色？

Change Button color with SharedPreferencers Android?

android

android-button

android-sharedpreferences