在我的Android应用程序中，我必须以表布局显示从数据库获取的数据。我得到了数据，当我向表中添加TableRaws时，它给出了一个空指针。我正确实例化了表中的元素，但无法弄清错误。我的代码段如下所示。
TableLayout tbl=(TableLayout) findViewById(R.id.dpl_tbl_lst);
if(!retailersList.isEmpty()){
//TableRow Hedding=(TableRow) findViewById(R.id.dpl_tbl_hdr);
//tbl.addView(Hedding);
for(int i=0;i<retailersList.size();i++){
Retailer RtlIns=retailersList.get(i);
TableRow tbl_rw=(TableRow) findViewById(R.id.dpl_tbr_cnt);
TextView sequence, custommerName, city, status;
sequence=(TextView) findViewById(R.id.dpl_txt_seq);
custommerName=(TextView) findViewById(R.id.dpl_txt_cus_nm);
city=(TextView) findViewById(R.id.dpl_txt_cty);
status=(TextView) findViewById(R.id.dpl_txt_sts);
sequence.setText(RtlIns.getPosition());
custommerName.setText(RtlIns.getName());
city.setText(RtlIns.getCity());
status.setText(RtlIns.getStatus());
tbl_rw.addView(sequence);
tbl_rw.addView(custommerName);
tbl_rw.addView(city);
tbl_rw.addView(status);
tbl.addView(tbl_rw);}
我的表布局如下。
<TableLayout
android:id="@+id/dpl_tbl_lst"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TableRow
android:id="@+id/dpl_tbl_hdr"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="@+id/textview3"
android:layout_width="@dimen/cell_width_0"
android:layout_height="@dimen/cell_h_h"
android:background="@drawable/cell_shape"
android:padding="@dimen/cell_pdn"
android:text="@string/list_sequense"
android:textColor="@color/white"
android:textSize="@dimen/normal_text"
android:textStyle="bold" />
<TextView
android:layout_width="@dimen/cell_width_2"
android:layout_height="@dimen/cell_h_h"
android:background="@drawable/cell_shape"
android:padding="@dimen/cell_pdn"
android:text="@string/list_cust_name"
android:textColor="@color/white"
android:textSize="@dimen/normal_text"
android:textStyle="bold" />
<TextView
android:layout_width="@dimen/cell_width_2"
android:layout_height="@dimen/cell_h_h"
android:background="@drawable/cell_shape"
android:padding="@dimen/cell_pdn"
android:text="@string/list_city"
android:textColor="@color/white"
android:textSize="@dimen/normal_text"
android:textStyle="bold" />
<TextView
android:layout_width="@dimen/cell_width_1"
android:layout_height="@dimen/cell_h_h"
android:background="@drawable/cell_shape"
android:padding="@dimen/cell_pdn"
android:text="@string/list_status"
android:textColor="@color/white"
android:textSize="@dimen/normal_text"
android:textStyle="bold" />
</TableRow>
</TableLayout>
有人可以帮我这个忙。
// try this way i gave simple demo but you have use your data rather my static data..
1. **table.xml**
<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/dpl_tbl_lst"
android:layout_width="match_parent"
android:layout_height="match_parent">
</TableLayout>
2.**table_row.xml**
<?xml version="1.0" encoding="utf-8"?>
<TableRow xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/dpl_tbl_hdr"
android:layout_width="match_parent"
android:orientation="horizontal"
android:layout_height="wrap_content">
<TextView
android:id="@+id/dpl_txt_seq"
android:layout_width="0dp"
android:layout_weight="1"
android:gravity="center"
android:layout_height="wrap_content"
android:text="asd"/>
<TextView
android:id="@+id/dpl_txt_cus_nm"
android:layout_width="0dp"
android:layout_weight="1"
android:gravity="center"
android:layout_height="wrap_content"
android:text="asd"/>
<TextView
android:id="@+id/dpl_txt_cty"
android:layout_width="0dp"
android:layout_weight="1"
android:gravity="center"
android:layout_height="wrap_content"
android:text="asd"/>
<TextView
android:id="@+id/dpl_txt_sts"
android:layout_width="0dp"
android:layout_weight="1"
android:gravity="center"
android:layout_height="wrap_content"
android:text="asd"/>
</TableRow>
3. **MyActivity.java**
public class MyActivity extends Activity {
TableLayout dpl_tbl_lst;
@Override
protected void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.table);
dpl_tbl_lst = (TableLayout) findViewById(R.id.dpl_tbl_lst);
for (int i=0;i<5;i++){
View row = LayoutInflater.from(this).inflate(R.layout.table_row,null,false);
TextView dpl_txt_seq = (TextView) row.findViewById(R.id.dpl_txt_seq);
TextView dpl_txt_cus_nm = (TextView) row.findViewById(R.id.dpl_txt_cus_nm);
TextView dpl_txt_cty = (TextView) row.findViewById(R.id.dpl_txt_cty);
TextView dpl_txt_sts = (TextView) row.findViewById(R.id.dpl_txt_sts);
dpl_txt_seq.setText("Seq"+String.valueOf(i+1));
dpl_txt_cus_nm.setText("Nm"+String.valueOf(i+1));
dpl_txt_cty.setText("City"+String.valueOf(i+1));
dpl_txt_sts.setText("Sts"+String.valueOf(i+1));
dpl_txt_seq.setTag("Seq"+String.valueOf(i+1));
dpl_txt_seq.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String data = view.getTag().toString();
Toast.makeText(MyActivity.this,data,Toast.LENGTH_SHORT).show();
}
});
dpl_txt_cus_nm.setTag("Nm"+String.valueOf(i+1));
dpl_txt_cus_nm.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String data = view.getTag().toString();
Toast.makeText(MyActivity.this,data,Toast.LENGTH_SHORT).show();
}
});
dpl_txt_cty.setTag("City"+String.valueOf(i+1));
dpl_txt_cty.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String data = view.getTag().toString();
Toast.makeText(MyActivity.this,data,Toast.LENGTH_SHORT).show();
}
});
dpl_txt_sts.setTag("Sts"+String.valueOf(i+1));
dpl_txt_sts.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String data = view.getTag().toString();
Toast.makeText(MyActivity.this,data,Toast.LENGTH_SHORT).show();
}
});
dpl_tbl_lst.addView(row);
}
}
}
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