Question

我创建了一个GridView，我想从每个按钮开始一些活动。 gridView位于一个名为Status的类中，代码如下：

public class Status extends AppCompatActivity {

    Toolbar toolbar;
    CollapsingToolbarLayout collapsingToolbarLayoutAndroid;
    CoordinatorLayout rootLayoutAndroid;
    GridView gridView;

    public static String[] gridViewStrings = {
            "Stato",
            "Allarmi",
            "Impostazioni",
            "Numero SIM",
            "Dati Impianto",
            "Esci",

    };
    public static int[] gridViewImages = {
            R.drawable.chart,
            R.drawable.alert,
            R.drawable.set,
            R.drawable.sim_status,
            R.drawable.impianto2,
            R.drawable.close,
    };

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

        toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
        gridView = (GridView) findViewById(R.id.grid);
        gridView.setAdapter(new CustomAndroidGridViewAdapter(this, gridViewStrings, gridViewImages));

        gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {


                switch (position) {
                    case 0:
                        Intent i = new Intent(getApplicationContext(), Status.class);
                        i.putExtra("id", position);
                        startActivity(i);
                        break;

                    case 1:
                        finish();
                        break;
                }

            }
        });

        initInstances();


    }

    private void initInstances() {
        rootLayoutAndroid = (CoordinatorLayout) findViewById(R.id.android_coordinator_layout);
        collapsingToolbarLayoutAndroid = (CollapsingToolbarLayout) findViewById(R.id.collapsing_toolbar_android_layout);
        collapsingToolbarLayoutAndroid.setTitle("ESA MOBILE App");
    }
}

我的Adapter类如下：我想从第一个按钮启动活动并从第二个按钮关闭活动，但是不起作用。

class CustomAndroidGridViewAdapter extends BaseAdapter {
    private Context mContext;
    private final String[] string;
    private final int[] Imageid;

    CustomAndroidGridViewAdapter(Context c,String[] string,int[] Imageid ) {
        mContext = c;
        this.Imageid = Imageid;
        this.string = string;
    }

    @Override
    public int getCount() {
        return string.length;
    }

    @Override
    public Object getItem(int p) {
        return null;
    }

    @Override
    public long getItemId(int p) {
        return 0;
    }

    @SuppressLint("InflateParams")
    @Override
    public View getView(int p, View convertView, ViewGroup parent) {
        View grid;
        LayoutInflater inflater = (LayoutInflater) mContext
                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        if (convertView == null) {

            grid = inflater.inflate(R.layout.gridview_custom_layout, null);
            TextView textView = (TextView) grid.findViewById(R.id.gridview_text);
            ImageView imageView = (ImageView)grid.findViewById(R.id.gridview_image);
            textView.setText(string[p]);
            imageView.setImageResource(Imageid[p]);
        } else {
            grid = convertView;
        }



        return grid;
    }
}

Answer 1

我认为你应该更新你的getView（）来设置正确的点击监听器。当您在适配器中更新它们时，您似乎还有一个错误：BTW，使用View Holder模式可以提高此代码的效率）：

@SuppressLint("InflateParams")
@Override
public View getView(int p, View convertView, ViewGroup parent) {
    View grid;
    LayoutInflater inflater = (LayoutInflater) mContext
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    if (convertView == null) {
        grid = inflater.inflate(R.layout.gridview_custom_layout, null);
    } else {
        grid = convertView;
    }

    TextView textView = (TextView) grid.findViewById(R.id.gridview_text);
    ImageView imageView = (ImageView)grid.findViewById(R.id.gridview_image);
    textView.setText(string[p]);
    imageView.setImageResource(Imageid[p]);

    // Here you can set your click listener.
    // Another option is to have a OnClickListener array (like you have for the strings and images and use it in a similar way). 
    grid.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            switch (p) {
                case 0:
                    // Start activity
                    break;
                case 1:
                    // Close
                    break;
                default:
                    // Do something else
                    break;
            }
        }
    });
    return grid;
}

Answer 2

我不确定，但我认为您要求点击该项目（不在项目内的ImageView上）

所以在获取父级的id之后执行click in adapter，或者您可以在适配器中实现对图像的单击，如：

 imageView.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {

//Toast here

    }});

从GridView启动Activity

2 个答案: