Question

我正在写一个简单的程序，涉及某些元素的颜色变化。对于换色，我必须在SharedMemory中存储颜色值（我从颜色选择器中获得）。我有以下颜色选择器代码：

public class MainActivity extends Activity implements OnColorChangedListener {

    private ColorPicker picker;
    private SVBar svBar;
    private OpacityBar opacityBar;
    private Button button;
    private TextView text;

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

        picker = (ColorPicker) findViewById(R.id.picker);
        svBar = (SVBar) findViewById(R.id.svbar);
        opacityBar = (OpacityBar) findViewById(R.id.opacitybar);
        button = (Button) findViewById(R.id.button1);
        text = (TextView) findViewById(R.id.textView1);

        picker.addSVBar(svBar);
        picker.addOpacityBar(opacityBar);
        picker.setOnColorChangedListener(this);

        button.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Log.v("Color",""+ picker.getColor());
                text.setTextColor(picker.getColor());
                picker.setOldCenterColor(picker.getColor());
            }
        });
    }

    @Override
    public void onColorChanged(int color) {
        //gives the color when it's changed.
    }
}

如何在SharedMemory中存储 picker.getColor（）的值？

Answer 1

@Override 
public void onColorChanged(int color) {
    SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
    SharedPreferences.Editor editor = sharedPref.edit();
    editor.putInt(getString(R.string.mycolor), color);
    editor.commit();
}

要从共享首选项中获取存储的颜色，请使用此

  SharedPreferences sharedPref = getActivity().getPreferences(Context.MODE_PRIVATE);
  int storedColor = sharedPref.getInt(getString(R.string.mycolor), 0);

Answer 2

用户存储您的颜色值的SharedPreference。

共享首选项是指您可以存储数据的地方，直到设备上存在应用程序时，以及用户是否未通过设置清除应用程序内存。

如果您想存储颜色数组，请参阅此帖子： https://stackoverflow.com/a/12350878/2035885

如果只需要存储一个值，请参阅以下内容：

public static int getColor(Context context)
{
SharedPreferences sharedPreference = context.getSharedPreferences("your_shared_preference_name",Context.MODE_PRIVATE);
return sharedPreference.getInt("key_to_use_to_set_and_retrieve_value", 0);
}


public static void setColor(Context context,int color)
{
SharedPreferences store = context.getSharedPreferences(MenuActivity.class.getSimpleName(),Context.MODE_PRIVATE);
SharedPreferences.Editor edit = store.edit();
edit.putInt("key_to_use_to_set_and_retrieve_value", color);
edit.commit();
}

Answer 3

将其存储为int。那就是它的本质。

@Override 
public void onColorChanged(int color) {
    // omitted: get a SharedPreferences object first
    sharedPreferences.edit().putInt("color", color).apply();
}

Answer 4

// try this way,hope this will help you...

//Set To SharedPreferences
  SharedPreferences sharedPreferences = getSharedPreferences("yourSharePreferenceName", MODE_PRIVATE);
  SharedPreferences.Editor editor = sharedPreferences.edit();
  editor.putInt("pickerColor",picker.getColor() );
  editor.commit();

//Get From SharedPreferences
  SharedPreferences sharedPreferences = getSharedPreferences("yourSharePreferenceName", MODE_PRIVATE);
  picker.setOldCenterColor(sharedPreferences.getInt("pickerColor",0));

Answer 5

java是跟随

package com.example.sharedpreferenceexample;

import android.app.Activity;
import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.preference.PreferenceManager;

public class Utils {

    public static void savePreferences(Activity activity, String key1,
            int value1) {
        SharedPreferences sp = PreferenceManager
                .getDefaultSharedPreferences(activity.getApplicationContext());
        Editor editor = sp.edit();

        editor.putInt(key1, value1);

        editor.commit();
    }

    public static int readPreferences(Activity activity, String key,
            int defaultValue) {
        SharedPreferences sp = PreferenceManager
                .getDefaultSharedPreferences(activity.getApplicationContext());
        return sp.getInt(key, defaultValue);
    }
}

并按如下方式使用

保存

Utils.savePreferences(MainActivity.this, "colorKey", colorValue);

阅读

 Utils.readPreferences(MainActivity.this, "colorKey", 0)

如何在SharedMemory中存储颜色值？

5 个答案: