依據上篇最後的預告，今天我會將CardView、MainActivity與SharedPreferences部分都用好。
這一篇會比較多程式碼，文字部分就佔少數，因為基本上之前能講都講過了，如果這次出現之前沒講這次也沒講的東西，請原諒我一定是我忘記了，事先跟大家說抱歉(┬┬﹏┬┬)
private Button button;
private RecyclerView recyclerView;
private MyListAdapter myListAdapter;
private TextView link,play;
private ArrayList<HashMap<String, String>> mArrayList;
private Context context = this;
private MainPresenter mainPresenter;
private SP sp;
link = findViewById(R.id.main_link_tv);
play = findViewById(R.id.main_play_tv);
button = findViewById(R.id.main_edit_btn);
recyclerView = findViewById(R.id.main_list_rl);
link.setMovementMethod(LinkMovementMethod.getInstance());
mainPresenter =new MainPresenter(this,this);
sp = new SP(this);
mainPresenter.makeData();
setRecyclerView(mArrayList);
//setRecyclerView
private void setRecyclerView(ArrayList<HashMap<String, String>> mArrayList) {
myListAdapter = new MyListAdapter(mArrayList, this);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(myListAdapter);
}
play.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this, PlayActivity.class);
startActivity(intent);//將intent 發送到Android,判別後顯示到SA畫面中
}
});
button.setOnClickListener((v) -> {
AlertDialog.Builder dialog = new AlertDialog.Builder(this);
final EditText editText = new EditText(this);
//設置標題文字
dialog.setTitle("文字顯示");
//使用輸入editText
dialog.setView(editText);
//左邊按鈕
dialog.setNeutralButton("增加上次輸入", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
editText.setText(sp.loadData());
String inputText = editText.getText().toString();
myListAdapter.add(inputText);
Toast.makeText(context, inputText+"，新增成功", Toast.LENGTH_SHORT).show();
}
});
//設置 關閉 按鈕和點擊事件
dialog.setNegativeButton("關閉", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
// TODO: ...
}
});
//設置 確定 按鈕和點擊事件
dialog.setPositiveButton("確定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
// TODO: ...
String inputText = editText.getText().toString();
myListAdapter.add(inputText);
Toast.makeText(context, inputText+"，新增成功", Toast.LENGTH_SHORT).show();
}
});
//顯示Dialog
dialog.show();
});
(完整程式碼)
public class MainActivity extends AppCompatActivity implements MainContract.view{
private Button button;
private RecyclerView recyclerView;
private MyListAdapter myListAdapter;
private TextView link,play;
private ArrayList<HashMap<String, String>> mArrayList;
private Context context = this;
private MainPresenter mainPresenter;
private SP sp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
EdgeToEdge.enable(this);
setContentView(R.layout.activity_main);
link = findViewById(R.id.main_link_tv);
play = findViewById(R.id.main_play_tv);
button = findViewById(R.id.main_edit_btn);
recyclerView = findViewById(R.id.main_list_rl);
link.setMovementMethod(LinkMovementMethod.getInstance());
mainPresenter =new MainPresenter(this,this);
sp = new SP(this);
mainPresenter.makeData();
setRecyclerView(mArrayList);
play.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent(MainActivity.this, PlayActivity.class);
startActivity(intent);//將intent 發送到Android,判別後顯示到SA畫面中
}
});
button.setOnClickListener((v) -> {
AlertDialog.Builder dialog = new AlertDialog.Builder(this);
final EditText editText = new EditText(this);
//設置標題文字
dialog.setTitle("文字顯示");
//使用輸入editText
dialog.setView(editText);
//左邊按鈕
dialog.setNeutralButton("增加上次輸入", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
editText.setText(sp.loadData());
String inputText = editText.getText().toString();
myListAdapter.add(inputText);
Toast.makeText(context, inputText+"，新增成功", Toast.LENGTH_SHORT).show();
}
});
//設置 關閉 按鈕和點擊事件
dialog.setNegativeButton("關閉", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
// TODO: ...
}
});
//設置 確定 按鈕和點擊事件
dialog.setPositiveButton("確定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
// TODO: ...
String inputText = editText.getText().toString();
myListAdapter.add(inputText);
Toast.makeText(context, inputText+"，新增成功", Toast.LENGTH_SHORT).show();
}
});
//顯示Dialog
dialog.show();
});
}
//setRecyclerView
private void setRecyclerView(ArrayList<HashMap<String, String>> mArrayList) {
myListAdapter = new MyListAdapter(mArrayList, this);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
recyclerView.setAdapter(myListAdapter);
}
@Override
public void getData(ArrayList arrayList) {
mArrayList = arrayList;
}
跟之前MVP架構介紹沒多大差別，這裡就不多述。
public class MainPresenter implements MainContract.presenter{
private MainContract.view callBack;
ArrayList<HashMap<String, String>> mArrayList = new ArrayList<>();
private Activity activity;
public MainPresenter(MainContract.view view, Activity activity){
//接收View。
this.callBack =view;
this.activity = activity;
}
//makeData
@Override
public void makeData() {
for (int i = 0; i < 10; i++) {
HashMap<String, String> hashMap = new HashMap<>();
hashMap.put("msg",activity.getResources().obtainTypedArray(R.array.msg).getString(i));
mArrayList.add(hashMap);
}
callBack.getData(mArrayList);
}
}
這裡我利用getResources().obtainTypedArray(R.array.msg).getString(i) 將我之前寫在strings.xml中的文字一一放進去。
public interface MainContract {
interface view{
void getData(ArrayList arrayList);
}
interface presenter{
void makeData();
}
}
跟之前說的沒有特別大差別，不了解可以往前翻翻，這裡是幫我記錄上次新增的文字，之後方便拿取與儲存。
public class SP {
private SharedPreferences spf;
private Context context;
private static String MSG = "msg";
public SP(Context context) {
this.context = context;
spf = this.context.getSharedPreferences(context.getString(R.string.app_name), Context.MODE_PRIVATE);
}
public void saveData(String msg) {
spf.edit().putString(MSG, msg).apply();
}
public String loadData() {
return spf.getString(MSG," ");
}
}
這個在RecyclerView那篇有介紹過了，不了解可以回去看看，有如何建立跟它那些功能之類的，這裡我增加了新增與更改的建構元。
//新增
public void add(String text) {
HashMap<String, String> map = new HashMap<>();
map.put(KEY, text);
mArrayList.add(map);
notifyItemInserted(mArrayList.size() - 1);
sp.saveData(text);
}
//更改
public void update(int position, String text) {
if (position >= 0 && position < mArrayList.size()) {
HashMap<String, String> map = mArrayList.get(position);
map.put(KEY, text);
notifyItemChanged(position);
}
}
(完整程式碼)
public class MyListAdapter extends RecyclerView.Adapter<MyListAdapter.ViewHolder> {
private ArrayList<HashMap<String, String>> mArrayList;
private Activity activity;
private SP sp;
private static final String KEY = "msg";
public MyListAdapter(ArrayList<HashMap<String, String>> arrayList, Activity activity){
this.mArrayList = arrayList;
this.activity = activity;
sp = new SP(activity);
}
//新增
public void add(String text) {
HashMap<String, String> map = new HashMap<>();
map.put(KEY, text);
mArrayList.add(map);
notifyItemInserted(mArrayList.size() - 1);
sp.saveData(text);
}
//更改
public void update(int position, String text) {
if (position >= 0 && position < mArrayList.size()) {
HashMap<String, String> map = mArrayList.get(position);
map.put(KEY, text);
notifyItemChanged(position);
}
}
public class ViewHolder extends RecyclerView.ViewHolder {
private TextView msg;
public ViewHolder(View itemView) {
super(itemView);
msg = itemView.findViewById(R.id.rl_msg_tv);
}
}
@Override
public MyListAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext())
.inflate(R.layout.recycleritem_cardview, parent, false);
return new MyListAdapter.ViewHolder(view);
}
@Override
public void onBindViewHolder(@NonNull MyListAdapter.ViewHolder holder, int position) {
HashMap<String, String> item = mArrayList.get(position);
String msg = item.get(KEY); // 從 HashMap 中取出 msg
holder.msg.setText(msg);
holder.itemView.setOnClickListener((v)->{
AlertDialog.Builder dialog = new AlertDialog.Builder(activity);
final EditText editText = new EditText(activity);
//設置標題文字
dialog.setTitle("文字顯示");
//使用輸入editText
dialog.setView(editText);
editText.setText(msg);
//設置左邊按鈕和點擊事件
dialog.setNegativeButton("關閉", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
// TODO: ...
}
});
//設置右邊按鈕和點擊事件
dialog.setPositiveButton("確定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
// TODO: ...
String inputText = editText.getText().toString();
update(position, inputText);
}
});
//顯示Dialog
dialog.show();
});
}
@Override
public int getItemCount() {
return mArrayList.size();
}
}
以上就是中篇所有內容，接著就是最終篇小遊戲部分完成就大功告成了，明天也是最後一天，加油~( •̀ ω •́ )✧
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