嗨我正在制作一个字典应用程序，我希望当我从列表视图中打开一个单词，然后在单词页面（word.class）（其中解释单词含义）时，我想将该单词添加到listview形状中的favorite.class活动，稍后我可以从列表视图中检索该单词。
我想在一个java类中点击收藏夹按钮并在favorite.class的anathor活动中保存该单词（该词的类名称）。最喜欢的按钮实际上是操作栏上可见的菜单项。请解释我所有的代码以及如何做到这一点的方式..请给出一些代码以便完成它。
public class Atherosclerosis extends Activity {
// declare variables for the table of content and paragraph heading here//
ScrollView scrollView;
TextView sign_atherosclerosis;
TextView sign_id;
TextView def_id;
TextView def_atherosclerosis;
TextView riskfac_id;
TextView riskfac_atherosclerosis;
TextView pathophy_id;
TextView pathophy_atherosclerosis;
TextView Dx_id;
TextView Dx_atherosclerosis;
TextView Rx_id;
TextView Rx_atherosclerosis;
TextView prevent_id;
TextView prevent_atherosclerosis;
TextView compl_id;
TextView compl_atherosclerosis;
@SuppressLint("NewApi")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.atherosclerosis);
//here relate the variable for clickonlistener activity and direct scrolldown activity //
final ScrollView scrollView=(ScrollView)findViewById(R.id.scrollatherosclerosis);
TextView sign_id=(TextView)findViewById(R.id.Signandsymptomps_id);
final TextView sign_atherosclerosis=(TextView)findViewById(R.id.Signandsymptoms_atherosclerosis);
TextView def_id=(TextView)findViewById(R.id.definition_id);
final TextView def_atherosclerosis=(TextView)findViewById(R.id.definition_atherosclerosis);
TextView riskfac_id=(TextView)findViewById(R.id.riskfactor_id);
final TextView riskfac_atherosclerosis=(TextView)findViewById(R.id.riskfactor_atherosclerosis);
TextView pathophy_id=(TextView)findViewById(R.id.pathophysiology_id);
final TextView pathophy_atherosclerosis=(TextView)findViewById(R.id.pathophysiology_atherosclerosis);
TextView Dx_id=(TextView)findViewById(R.id.Diagnosis_id);
final TextView Dx_atherosclerosis=(TextView)findViewById(R.id.diagnosis_atherosclerosis);
TextView Rx_id=(TextView)findViewById(R.id.treatment_id);
final TextView Rx_atherosclerosis=(TextView)findViewById(R.id.treatment_atherosclerosis);
TextView prevent_id=(TextView)findViewById(R.id.prevention_id);
final TextView prevent_atherosclerosis=(TextView)findViewById(R.id.prevention_atherosclerosis);
TextView compl_id=(TextView)findViewById(R.id.complication_id);
final TextView compl_atherosclerosis=(TextView)findViewById(R.id.complication_atherosclerosis);
// this code is used for the action bar color change//
ActionBar bar = getActionBar();
bar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#6B8E23")));
getActionBar().setDisplayHomeAsUpEnabled(true);
getActionBar().setHomeButtonEnabled(true);
// this is the code for jumping from the table of content to the paragraph//
sign_id.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
scrollView.post(
new Runnable() {
@Override
public void run() {
new CountDownTimer(300, 20) {
@Override
public void onTick(long millisUntilFinished) {
scrollView.scrollTo(0, (int) (sign_atherosclerosis.getBottom()-millisUntilFinished));
}
@Override
public void onFinish() {
}
}.start();
}
}
);
}
});
def_id.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
scrollView.post(
new Runnable() {
@Override
public void run() {
new CountDownTimer(300, 20) {
@Override
public void onTick(long millisUntilFinished) {
scrollView.scrollTo(0, (int) (def_atherosclerosis.getBottom()-millisUntilFinished));
}
@Override
public void onFinish() {
}
}.start();
}
}
);
}
});
riskfac_id.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
scrollView.post(
new Runnable() {
@Override
public void run() {
new CountDownTimer(300, 20) {
@Override
public void onTick(long millisUntilFinished) {
scrollView.scrollTo(0, (int) (riskfac_atherosclerosis.getBottom()-millisUntilFinished));
}
@Override
public void onFinish() {
}
}.start();
}
}
);
}
});
pathophy_id.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
scrollView.post(
new Runnable() {
@Override
public void run() {
new CountDownTimer(300, 20) {
@Override
public void onTick(long millisUntilFinished) {
scrollView.scrollTo(0, (int) (pathophy_atherosclerosis.getBottom()-millisUntilFinished));
}
@Override
public void onFinish() {
}
}.start();
}
}
);
}
});
Dx_id.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
scrollView.post(
new Runnable() {
@Override
public void run() {
new CountDownTimer(300, 20) {
@Override
public void onTick(long millisUntilFinished) {
scrollView.scrollTo(0, (int) (Dx_atherosclerosis.getBottom()-millisUntilFinished));
}
@Override
public void onFinish() {
}
}.start();
}
}
);
}
});
Rx_id.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
scrollView.post(
new Runnable() {
@Override
public void run() {
new CountDownTimer(300, 20) {
@Override
public void onTick(long millisUntilFinished) {
scrollView.scrollTo(0, (int) (Rx_atherosclerosis.getBottom()-millisUntilFinished));
}
@Override
public void onFinish() {
}
}.start();
}
}
);
}
});
prevent_id.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
scrollView.post(
new Runnable() {
@Override
public void run() {
new CountDownTimer(300, 20) {
@Override
public void onTick(long millisUntilFinished) {
scrollView.scrollTo(0, (int) (prevent_atherosclerosis.getBottom()-millisUntilFinished));
}
@Override
public void onFinish() {
}
}.start();
}
}
);
}
});
compl_id.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
scrollView.post(
new Runnable() {
@Override
public void run() {
new CountDownTimer(300, 20) {
@Override
public void onTick(long millisUntilFinished) {
scrollView.scrollTo(0, (int) (compl_atherosclerosis.getBottom()-millisUntilFinished));
}
@Override
public void onFinish() {
}
}.start();
}
}
);
}
});
}
// this is for the options selected from the menu button of mobile//
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.atherosclerosis, menu);
return true;
}
// for starting activity from the option or menu//
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Take appropriate action for each action item click
switch (item.getItemId()) {
case R.id.id_search:
Intent newActivity0 = new Intent(this,Search.class);
startActivity(newActivity0);
return true;
case R.id.id_favorit:
SharedPreferences sp = this.getSharedPreferences("bookmarks", MODE_PRIVATE);
Editor editor = sp.edit();
editor.putString("favorite", "com.kmcpesh.shortreviewofcardiology.Favorite");
editor.commit();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
这是我最喜欢的.class活动
public class Favorite extends Activity {
private TextView mEmptyText;
private LinearLayout mBookmarkLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.favorite);
mEmptyText = (TextView) findViewById(R.id.empty_textview);
mBookmarkLayout = (LinearLayout) findViewById(R.id.bookmark_insert_point);
getAllKeys();
}
private void getAllKeys()
{
SharedPreferences sp = this.getSharedPreferences("bookmarks", MODE_PRIVATE);
Map<String,?> keys = sp.getAll();
int count = 0;
for(Map.Entry<String,?> entry : keys.entrySet())
{
String value = entry.getValue().toString();
System.out.println("!!!!!!!!!!!!!!!!!value = "+value);
String delimiter = ",";
String[] values_array = value.split(delimiter);
addBookmark(values_array);
count++; //keep track of the number of bookmarks
}
//if there are no bookmarks, display a text view saying so. Otherwise, make the text view go away
if (count == 0)
{
mEmptyText.setVisibility(View.VISIBLE);
mEmptyText.setText(getString(R.string.no_bookmark));
}
else
mEmptyText.setVisibility(View.GONE);
}
@SuppressWarnings("deprecation")
private void addBookmark(String[] values_array)
{
LayoutInflater vi = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View v = vi.inflate(R.layout.favorite, null);
TextView text = (TextView) v.findViewById(R.id.bookmark_text);
text.setText(values_array[1]);
// insert into main view
mBookmarkLayout.addView(v, 0, new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.FILL_PARENT));
System.out.println("!!!!!!!!!!!!!!!!!!!!Just added a view");
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.favorite, menu);
return true;
}
}
答案 0 :(得分：0)
Android中的SharedPreferences通常用于存储键值对，而不是您描述的列表。要将值存储到SharedPreferences中，您可以执行以下操作：
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
Editor ed = sp.edit();
ed.putString("myKey", "myValue");
然后从SharedPreferences中检索字符串键，你会这样做：
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
String value = sp.getString("myKey", "");
你可以在这里存储以逗号分隔的喜欢单词列表，然后解析列表：
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
Editor ed = sp.edit();
ed.putString("favorites", "dog,cat,bird,fish");
然后检索它们：
SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(this);
String favorites = sp.getString("myKey", "");
String[] words = values.split(",");
System.out.println(Arrays.toString(words));
然后你有一个包含所有喜欢的单词的数组。
[dog, cat, bird, fish]