自定义Action_Bar与textview android

时间：2016-11-21 14:52:18

标签： android listview

我有一个自定义操作栏，如下图所示：

Image

我也有列表视图。在列表的每一行中，它包含加号和减号图像按钮。我想显示当我按下加号按钮时，操作栏textView应显示为1，如果我再按下加号按钮，则应增加1并显示2。

请检查下面的代码并告诉我如何解决此问题。

public class MainMenu extends AppCompatActivity {
    String title;
    ListView listView;
    ImageView imageView,imageView1;

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

        ActionBar actionBar = getSupportActionBar();
        ActionBar.LayoutParams lp = new ActionBar.LayoutParams(ActionBar.LayoutParams.WRAP_CONTENT, ActionBar.LayoutParams.WRAP_CONTENT, Gravity.RIGHT | Gravity.CENTER_VERTICAL);
        View customNav = LayoutInflater.from(this).inflate(R.layout.actionbarlayout, null); // layout which contains your button.
        actionBar.setCustomView(customNav, lp);
        actionBar.setDisplayShowCustomEnabled(true);

        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        title = getIntent().getStringExtra("title");

        listView =(ListView)findViewById(R.id.listView);
        imageView = (ImageView)findViewById(R.id.plus);
        imageView1 = (ImageView)findViewById(R.id.minus);
    }

    public void plusClick(View v)
    {
        if (listView.getPositionForView(v)==0)
        {
            Toast.makeText(MainMenu.this, "this is Plus1", Toast.LENGTH_SHORT).show();
        }

        else if (listView.getPositionForView(v)==1)
        {
            Toast.makeText(MainMenu.this, "this is Plus2", Toast.LENGTH_SHORT).show();
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (getSupportActionBar() != null){
            getSupportActionBar().setTitle(title);
        }
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
            this.finish();
            return true;
        }
        return false;
    }
}

以下是我的类适配器

public class ListViewAdapter extends ArrayAdapter<ItemData> {

protected ListView mListView;

private final List<ItemData> items;
private LayoutInflater inflater;

public ListViewAdapter(Context context, int resource, List<ItemData> items) {
    super(context, resource, items);
    this.inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    this.items = items;
}

@Override
public int getCount() {
    return items != null ? items.size() : 0;
}

@Override
public ItemData getItem(int position) {


    return super.getItem(position);
}

@Override
public long getItemId(int position) {
    return position;
}


@Override
public View getView(int position, View convertView, ViewGroup parent) {
    // Check if an existing view is being reused, otherwise inflate the view
    View v = convertView;
    ViewHolder holder = null;






    if (v == null) {
        holder = new ViewHolder();
        int layout = R.layout.item_layout;
        v = inflater.inflate(layout, null);

        holder.tt1 = (TextView) v.findViewById(R.id.team);
        holder.tt12 = (TextView) v.findViewById(R.id.textView1);
        holder.img = (ImageView) v.findViewById(R.id.icon);
        holder.img1 = (ImageView) v.findViewById(R.id.plus);
        holder.img2 = (ImageView) v.findViewById(R.id.minus);
        v.setTag(holder);



    } else {
        holder = (ViewHolder) v.getTag();
    }


    if (position %2==0){

        v.setBackgroundResource(R.drawable.color1);

    }
    else {
        v.setBackgroundResource(R.drawable.color2);
    }


    ItemData p = items.get(position); //getItem(position);

    holder.tt1.setText(p.getTitle());
    holder.tt12.setText(p.getDetails());
    holder.img.setImageDrawable(p.getImage());
    holder.img1.setImageDrawable(p.getImageplus());
    holder.img2.setImageDrawable(p.getImageminus());

    Log.i("fff", "getView: image = " + p.getImage());

    //load image directly


    return v;
}




static class ViewHolder {
    TextView tt1, tt12;
    ImageView img,img1,img2;

}

}

2 个答案:

答案 0 :(得分：0)

尝试使用此

更新您的代码 
public class MainMenu extends AppCompatActivity {
    String title;
    ListView listView;
    ListViewAdapter adapter; 
    ArrayList<ItemData> search = new ArrayList<ItemData>();


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

        ActionBar actionBar = getSupportActionBar();
        ActionBar.LayoutParams lp = new ActionBar.LayoutParams(ActionBar.LayoutParams.WRAP_CONTENT, ActionBar.LayoutParams.WRAP_CONTENT, Gravity.RIGHT | Gravity.CENTER_VERTICAL);
        View customNav = LayoutInflater.from(this).inflate(R.layout.actionbarlayout, null); // layout which contains your button.
        actionBar.setCustomView(customNav, lp);
        actionBar.setDisplayShowCustomEnabled(true);

        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        title = getIntent().getStringExtra("title");
        listView =(ListView)findViewById(R.id.listView);
        adapter = new ListViewAdapter(getApplication(), search,listView, title);      
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
            this.finish();
            return true;
        }
        return false;
    }
}

<强> ListViewAdapter 

public class ListViewAdapter extends ArrayAdapter<ItemData> { 
protected ListView mListView;  
private final List<ItemData> items;
private LayoutInflater inflater;
TextView title;
private static int checkBoxCounter = 0;

public ListViewAdapter(Context context, int resource, List<ItemData> items,ListView listview, TextView title) {
    super(context, resource, items);
    this.inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    this.items = items;
    this.title = title;
}

@Override
public int getCount() {
    return items != null ? items.size() : 0;
}

@Override
public ItemData getItem(int position) {
   return super.getItem(position);
}

@Override
public long getItemId(int position) {
    return position;
}


@Override
public View getView(int position, View convertView, ViewGroup parent) {
    // Check if an existing view is being reused, otherwise inflate the view
    View v = convertView;
    ViewHolder holder = null;

    if (v == null) {
        holder = new ViewHolder();
        int layout = R.layout.item_layout;
        v = inflater.inflate(layout, null);
        holder.tt1 = (TextView) v.findViewById(R.id.team);
        holder.tt12 = (TextView) v.findViewById(R.id.textView1);
        holder.img = (ImageView) v.findViewById(R.id.icon);
        holder.img1 = (ImageView) v.findViewById(R.id.plus);
        holder.img2 = (ImageView) v.findViewById(R.id.minus);

        holder.imag1.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
             checkBoxCounter ++;
        }
        });

        holder.imag2.setOnClickListener(new OnClickListener() {
        public void onClick(View v) {
             checkBoxCounter --;
        }
});
        v.setTag(holder);
    } else {
        holder = (ViewHolder) v.getTag();
    }

    ItemData p = items.get(position); //getItem(position);
    holder.tt1.setText(p.getTitle());
    holder.tt12.setText(p.getDetails());
    holder.img.setImageDrawable(p.getImage());
    holder.img1.setImageDrawable(p.getImageplus());
    holder.img2.setImageDrawable(p.getImageminus());
    Log.i("fff", "getView: image = " + p.getImage());
    //load image directly
    return v;
}

static class ViewHolder {
    TextView tt1, tt12;
    ImageView img,img1,img2;   
}

答案 1 :(得分：0)

有几种方法可以做到，但我建议通过界面：

您可以在活动中实现一个接口，该接口将事件从适配器传递到Activity，例如：

public interface OnButtonClicked {
public void updateUI();

}

在MainMenu活动中实现此界面：

public class MainMenu extends AppCompatActivity implements onButtonClicked

创建适配器时，将活动对象传递给适配器：

适配器内的

声明私有变量：

onButtonClicked interface;

并在适配器构造函数中初始化它：

ListViewAdapter(OnButtonClicked interface)
{
   this.interface = interface;
}

最后，当在适配器中检测到click事件时，使用onButtonClicked updateUI方法更新父活动ui（在UI线程上运行）

推荐阅读有关接口的内容。

或者，您始终可以尝试将适配器上下文强制转换为调用活动：

MainMenu activity = (MainMenu) context;
activity.updateUI();
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