如何為 ListView SecondActivity 創建 arrayList

Question

我在strings.xml 中創建了一個字符串數組列表，以便它可以在和適配器中使用，但是當 listItemClick 打開一個新活動時，我不希望將存儲在字符串中的數組設置為新的描述性文本. 請幫我。 我想創建另一個數組列表作為完整描述，它應該與綁定到行的列表不同。

讓我進一步描述我的意思。

我的row.xml顯示一個 Image，一個 TextView 作為Title ，另一個 TextView 作為description 。 現在我已經使用這種安排為我的 Model.java 生成構造函數和 getter

現在，如果我單擊 ListView 項目列表，它會打開一個NewActivity.java ，將存儲在string.xml 中的數據作為 arrayList 提供，它只是標題和描述文本。 但我希望與該描述不同的另一個文本在 NewActivity.java 中顯示為全新的描述文本。 這就是我現在正在努力做的事情。

謝謝

這是MainActivity.java代碼

 public class MainActivity extends AppCompatActivity implements SearchView.OnQueryTextListener { private String TAG = "MainActivity ----- ; " ; // Store instance variables private int page; private ConsentForm form; ListView listView; ListViewAdapter adapter; List<String> title, description2,description; int[] icon; int [] soundfile; ArrayList<Model> arrayList = new ArrayList<Model>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ActionBar actionBar = getSupportActionBar(); actionBar.setTitle("Redeemed Songs"); //listview soundfile file for songs in position soundfile= new int[] {R.raw.song_1,R.raw.song_2,R.raw.song_3, R.raw.song_4,R.raw.song_5,R.raw.song_6,R.raw.song_7,R.raw.song_8,}; title = Arrays.asList(getResources().getStringArray(R.array.array_titles)); description = Arrays.asList(getResources().getStringArray(R.array.array_lyrics)); description2 = Arrays.asList(getResources().getStringArray(R.array.array_lyrics2)); icon = new int[]{ R.drawable.song, R.drawable.song, R.drawable.song, R.drawable.song,R.drawable.song,R.drawable.song, R.drawable.song,}; listView = findViewById(R.id.list); for (int i = 0; i< title.size(); i++){ Model model =new Model(title.get(i), description.get(i),description2.get(i), icon[i]); //bind all strings in an array arrayList.add(model); } //pass result to listview class adapter = new ListViewAdapter(this, arrayList); //bind the adapter to the listview class listView.setAdapter(adapter); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.menu, menu); MenuItem myActionMenuItem = menu.findItem(R.id.action_search); SearchView searchView = (SearchView)myActionMenuItem.getActionView(); searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() { @Override public boolean onQueryTextSubmit(String s) { return false; } @Override public boolean onQueryTextChange(String s) { if (TextUtils.isEmpty(s)){ adapter.filter(""); listView.clearTextFilter(); } else { adapter.filter(s); } return true; } }); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); if (id==R.id.action_settings){ Toast.makeText(this, "Settings Selected", Toast.LENGTH_SHORT).show(); startActivity(new Intent(this, Main2Activity.class)); return true; //do your funtionality here } else if (id==R.id.action_howtouse){ Toast.makeText(this, "How-To", Toast.LENGTH_SHORT).show(); startActivity(new Intent(this, Main3Activity.class)); return true; //do your funtionality here }else if (id==R.id.action_favorites){ Toast.makeText(this, "Favorites Selected", Toast.LENGTH_SHORT).show(); startActivity(new Intent(this, Main3Activity.class)); return true; //do your funtionality here } else if (id==R.id.action_developers){ Toast.makeText(this, "About", Toast.LENGTH_SHORT).show(); startActivity(new Intent(this, Main4Activity.class)); return true; //do your funtionality here } return super.onOptionsItemSelected(item); } @Override public boolean onQueryTextSubmit(String query) { return false; } @Override public boolean onQueryTextChange(String newText) { return false; } }

這是 ListViewAdapter.java

 public class ListViewAdapter extends BaseAdapter{ //Variables Context mContext; LayoutInflater inflater; List<Model> modellist; ArrayList<Model> arrayList; int [] soundfile; //Constructor public ListViewAdapter(Context context, List<Model> modellist) { mContext = context; this.modellist = modellist; inflater = LayoutInflater.from(mContext); this.arrayList = new ArrayList<Model>(); this.arrayList.addAll(modellist); } public class ViewHolder{ TextView mTitleTv, mDescTv; ImageView mIconTv; MediaPlayer mediaPlayer; } @Override public int getCount() { return modellist.size(); } @Override public Object getItem(int i) { return modellist.get(i); } @Override public long getItemId(int i) { return i; } @Override public View getView(final int i, View view, ViewGroup parent) { final ViewHolder holder; if (view==null){ holder = new ViewHolder(); view = inflater.inflate(R.layout.row, null); //locate the views in row.xml holder.mTitleTv = (TextView) view.findViewById(R.id.mainTitle); holder.mDescTv = (TextView) view.findViewById(R.id.mainDesc); holder.mIconTv = view.findViewById(R.id.mainIcon); view.setTag(holder); } else { holder = (ViewHolder)view.getTag(); } //set the result into textview holder.mTitleTv.setText(modellist.get(i).getTitle()); holder.mDescTv.setText(modellist.get(i).getDesc()); //Set the result in imagview holder.mIconTv.setImageResource(modellist.get(i).getIcon()); //listview soundfile file for songs in position soundfile= new int[] {R.raw.song_1,R.raw.song_2,R.raw.song_3, R.raw.song_4,R.raw.song_5,R.raw.song_6,R.raw.song_7,R.raw.song_8,}; //listview item clicks view.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { //code later Intent intent = new Intent(mContext, NewActivity.class); intent.putExtra("position", getViewTypeCount()); intent.putExtra("actionBarTitle", modellist.get(i).getTitle()); intent.putExtra("contentTv", modellist.get(i).getDesc()); mContext.startActivity(intent); } }); return view; } //filter public void filter(String charText){ charText = charText.toLowerCase(Locale.getDefault()); modellist.clear(); if (charText.length()==0){ modellist.addAll(arrayList); } else { for (Model model : arrayList){ if (model.getTitle().toLowerCase(Locale.getDefault()).contains(charText)){ modellist.add(model); } } } notifyDataSetChanged(); } }

這是 String.xml

 <resources> <string name="app_name">Redeemed Songs</string> <string-array name="array_lyrics"> <item>This song lyrics 1</item> <item>This song lyrics 2</item> </string-array> <string-array name="array_lyrics2"> <item>This brand new description for song lyrics 1</item> <item>This brand new description for song lyrics 1</item> </string-array> <string-array name="array_titles"> <item>Song 001</item> <item>Song 002</item> </string-array> </resources>

Answer 1

將其作為屬性添加到您的模型中

class Model{

your variable
.
.
.
String brandNewDesc;


public String getBrandNewDesc(){

return brandNewDesc;
}
public void setBrandNewDesc(String description){

brandNewDesc =description;
}

}

並使用

   //listview item clicks
    view.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            //code later
            Intent intent = new Intent(mContext, NewActivity.class);
            intent.putExtra("position", getViewTypeCount());
            intent.putExtra("actionBarTitle", modellist.get(i).getTitle());
            intent.putExtra("contentTv", modellist.get(i).getDesc());
            **intent.putExtra("brandNewDesc", modellist.get(i).getBrandNewDesc());**

            mContext.startActivity(intent);


        }
    });