单击表格行中的textView时出错

Question

我有一个包含textviews的表行，我试图使用intent来单击文本视图以移至下一个活动，但是当我单击text view时出现以下错误

java.lang.IllegalStateException: Could not find method onClick(View) in a parent or ancestor Context for android:onClick attribute defined on view class android.support.v7.widget.AppCompatTextView with id 'tv_msisdn'
                                                                                   at android.view.View$DeclaredOnClickListener.resolveMethod(View.java:4479)
                                                                                   at android.view.View$DeclaredOnClickListener.onClick(View.java:4443)
                                                                                   at android.view.View.performClick(View.java:5198)
                                                                                   at android.view.View$PerformClick.run(View.java:21147)
                                                                                   at android.os.Handler.handleCallback(Handler.java:739)

代码听到

package com.tela.mobile.home;
import android.content.Intent;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.view.View.OnClickListener;
import com.tela.mobile.R;

public class DeviceAlertDetail extends  Activity implements OnClickListener
{
   private TextView tv_number;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);

      setContentView(R.layout.tablerow_overage);

      TextView textView = (TextView)findViewById(R.id.tv_number);

      tv_number.setOnClickListener(this);

   }
   public void onClick(View view)
   {
      Intent intent = new Intent(this, SearchResultsActivity.class);
      this.startActivity(intent);
   }

}

并且我在布局文件中将textView设置为onClick，如下所示

 <TextView
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_column="1"
    android:layout_weight="1"
    android:padding="1dp"
    android:text="number"
    android:id="@+id/tv_number"
    android:textSize="12sp"
    android:maxLines="1"
       android:onClick="onClick"
       android:clickable="true"
    android:ellipsize="end"

      />

Answer 1

当您使用android:onClick="onClick"时，您不必实现OnClickListener ，只需将其public void onClick(View view)并从活动中删除implements OnClickListener

您的代码将像

package com.tela.mobile.home;
import android.content.Intent;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.view.View.OnClickListener;
import com.tela.mobile.R;

public class DeviceAlertDetail extends  Activity
{
   private TextView tv_number;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);

      setContentView(R.layout.tablerow_overage);

   }
   public void onClick(View view)
   {
      Intent intent = new Intent(this, SearchResultsActivity.class);
      this.startActivity(intent);
   }

}

和

 <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_column="1"
        android:layout_weight="1"
        android:padding="1dp"
        android:text="number"
        android:id="@+id/tv_number"
        android:textSize="12sp"
        android:maxLines="1"
        android:onClick="onClick"
        android:clickable="true"
        android:ellipsize="end"

        />

Answer 2

我认为您是错误的参考名称。

只是改变

    tv_number.setOnClickListener(this);

同

    textView.setOnClickListener(this);

您的代码成为

//Activity

package com.tela.mobile.home;
import android.content.Intent;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.view.View.OnClickListener;
import com.tela.mobile.R;

public class DeviceAlertDetail extends  Activity implements OnClickListener
{
   private TextView textView;

   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);

      setContentView(R.layout.tablerow_overage);

      textView = (TextView)findViewById(R.id.tv_number);

      textView.setOnClickListener(this);

   }

   public void onClick(View view)
   {

      Toast.makeText(this,"Code Working Fine Now Remove Comments Of Below",Toast.LENGTH_LONG).show();
      //Intent intent = new Intent(this, SearchResultsActivity.class);
      //this.startActivity(intent);
   }

}

//.xml变成

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_column="1"
android:layout_weight="1"
android:padding="1dp"
android:text="number"
android:id="@+id/tv_number"
android:textSize="12sp"
android:maxLines="1"
android:clickable="true"
android:ellipsize="end"

  />

Answer 3

我认为您没有正确初始化tv_number 。

您已经创建了一个未使用的局部变量TextView textView ，这可能使您以为初始化了tv_number感到困惑。

请更换

TextView textView = (TextView)findViewById(R.id.tv_number);

同

tv_number = (TextView)findViewById(R.id.tv_number);