Question

我有一个浮动按钮（它很快就是一个按钮），当我点击它时，它会启动一个服务和按钮更改图标。我试着用这种方式：

mFab = (FloatingActionButton)findViewById(R.id.fabbutton);
mFab.setDrawable(getResources().getDrawable(R.drawable.ic_play));
mFab.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View view) {
                if (RunService.isRunning) {
                    RunService.stopRun(MainActivity.this);
                    mFab.setDrawable(getResources().getDrawable(R.drawable.ic_play));
                    SharedPreferences.Editor editor = getSharedPreferences("com.mypck.asd", MODE_PRIVATE).edit();
                    editor.putBoolean("NameOfThingToSave", true);
                    editor.commit();

                } else {
                    startService(new Intent(MainActivity.this, RunService.class));
                    mFab.setDrawable(getResources().getDrawable(R.drawable.ic_pause));

                }
            }
        });

并检索状态：

SharedPreferences sharedPrefs = getSharedPreferences("com.mypck.asd", MODE_PRIVATE);
mFab.setChecked(sharedPrefs.getBoolean("NameOfThingToSave", true));

但不是以这种方式工作，因为setChecked方法是用于切换按钮..而我的是一个简单的按钮！我怎么解决？

Answer 1

所以，只需保存SharedPreference中的按钮状态，如 true 和 false ，当服务在if-else条件下运行时 p>

请看下面的代码。

SharedPreferences.Editor editor = getSharedPreferences("com.mypck.asd", MODE_PRIVATE).edit();
if (RunService.isRunning) {
                RunService.stopRun(MainActivity.this);
                mFab.setDrawable(getResources().getDrawable(R.drawable.ic_play));                   
                editor.putBoolean("NameOfThingToSave", true);                    
            } else {
                startService(new Intent(MainActivity.this, RunService.class));
                mFab.setDrawable(getResources().getDrawable(R.drawable.ic_pause));
               editor.putBoolean("NameOfThingToSave", false);
            }
editor.commit();

<强>更新

要检索您必须执行的值，

SharedPreferences sharedPrefs = getSharedPreferences("com.mypck.asd", MODE_PRIVATE);
boolean buttonState = sharedPrefs.getBoolean("NameOfThingToSave", true);

if(buttonState)
{
  mFab.setDrawable(getResources().getDrawable(R.drawable.ic_play)); 
}else{
  mFab.setDrawable(getResources().getDrawable(R.drawable.ic_pause));
}

替换

mFab.setDrawable(getResources().getDrawable(R.drawable.ic_play));

上面的代码。

Answer 2

好的，只需按照您的喜好保存状态。

   mFab.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View view) {
                SharedPreferences.Editor editor = getSharedPreferences("com.mypck.asd", MODE_PRIVATE).edit();

                    if (RunService.isRunning) {
                        RunService.stopRun(MainActivity.this);
                        mFab.setDrawable(getResources().getDrawable(R.drawable.ic_play));                        
                        editor.putBoolean("NameOfThingToSave", true);
                    } else {
                       startService(new Intent(MainActivity.this,RunService.class));    
                        mFab.setDrawable(getResources().getDrawable(R.drawable.ic_pause));
                       editor.putBoolean("NameOfThingToSave", false);
                    }
                    editor.commit();

                }
            });

保存状态按钮sharedpreferences Android

2 个答案: