我想在点击后动态更改drawable ImageView。所以我写了下面的代码。所有其他功能都在工作，包括setImageResource没有任何错误，但没有在UI中显示任何更改。我也试过打电话给setImageDrawable，但它也无法正常工作......请帮帮我
package com.example.runwaylabz.canvi;
import android.content.Intent;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.Socket;
public class BlankFragment extends Fragment implements View.OnClickListener {
private String title;
private int page;
private static ImageView icon1, icon2, icon3, icon4, icon5, icon6, icon7, icon8;
boolean icon1boolean, icon2boolean, icon3boolean, icon4boolean, icon5boolean, icon6boolean, icon7boolean, icon8boolean;
private static String ip = "192.168.4.1";
private static int port = 23;
private static SocketConnection socketConnection;
public static BlankFragment newInstance(int page, String title) {
BlankFragment blankFragment = new BlankFragment();
Bundle args = new Bundle();
args.putInt("ind", page);
args.putString("tit", title);
blankFragment.setArguments(args);
socketConnection = SocketConnection.getInstance(ip, port);
return blankFragment;
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
page = getArguments().getInt("ind", 0);
title = getArguments().getString("tit", "Add");
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
getActivity().startService(new Intent(getActivity(), socketConnection.getClass()));
View v = inflater.inflate(R.layout.fragment_blank, container, false);
set_icon(v);
return v;
}
@Override
public void onDestroyView() {
getActivity().stopService(new Intent(getActivity(), socketConnection.getClass()));
super.onDestroyView();
}
@Override
public void onClick(View view) {
if (view.getTag().equals("icon")) {
icon_click_switch(view);
}
}
private void set_icon(View v) {
icon1 = (ImageView) v.findViewById(R.id.icon1);
icon2 = (ImageView) v.findViewById(R.id.icon2);
icon3 = (ImageView) v.findViewById(R.id.icon3);
icon4 = (ImageView) v.findViewById(R.id.icon4);
icon5 = (ImageView) v.findViewById(R.id.icon5);
icon6 = (ImageView) v.findViewById(R.id.icon6);
icon7 = (ImageView) v.findViewById(R.id.icon7);
icon8 = (ImageView) v.findViewById(R.id.icon8);
icon1.setOnClickListener(this);
icon2.setOnClickListener(this);
icon3.setOnClickListener(this);
icon4.setOnClickListener(this);
icon5.setOnClickListener(this);
icon6.setOnClickListener(this);
icon7.setOnClickListener(this);
icon8.setOnClickListener(this);
icon1.setTag("icon");
icon2.setTag("icon");
icon3.setTag("icon");
icon4.setTag("icon");
icon5.setTag("icon");
icon6.setTag("icon");
icon7.setTag("icon");
icon8.setTag("icon");
}
private void icon_click_switch(View view) {
switch (view.getId()) {
case R.id.icon1:
if (!icon1boolean) {
icon1.setImageResource(R.drawable.poweron);
socketConnection.writeouputstream(getString(R.string.icon1on));
icon1boolean = true;
} else {
icon1.setImageResource(R.drawable.power);
socketConnection.writeouputstream(getString(R.string.icon1off));
icon1boolean = false;
}
break;
case R.id.icon2:
if (!icon2boolean) {
icon2.setImageResource(R.drawable.poweron);
socketConnection.writeouputstream(getString(R.string.icon2on));
icon2boolean = true;
} else {
icon2.setImageResource(R.drawable.power);
socketConnection.writeouputstream(getString(R.string.icon2off));
icon2boolean = false;
}
break;
case R.id.icon3:
if (!icon3boolean) {
icon3.setImageResource(R.drawable.poweron);
socketConnection.writeouputstream(getString(R.string.icon3on));
icon3boolean = true;
} else {
icon3.setImageResource(R.drawable.power);
socketConnection.writeouputstream(getString(R.string.icon3off));
icon3boolean = false;
}
break;
case R.id.icon4:
if (!icon4boolean) {
icon4.setImageResource(R.drawable.poweron);
socketConnection.writeouputstream(getString(R.string.icon4on));
icon4boolean = true;
} else {
icon4.setImageResource(R.drawable.power);
socketConnection.writeouputstream(getString(R.string.icon4off));
icon4boolean = false;
}
break;
case R.id.icon5:
if (!icon5boolean) {
icon5.setImageResource(R.drawable.poweron);
socketConnection.writeouputstream(getString(R.string.icon5on));
icon5boolean = true;
} else {
icon5.setImageResource(R.drawable.power);
socketConnection.writeouputstream(getString(R.string.icon5off));
icon5boolean = false;
}
break;
case R.id.icon6:
if (!icon6boolean) {
icon6.setImageResource(R.drawable.poweron);
socketConnection.writeouputstream(getString(R.string.icon6on));
icon6boolean = true;
} else {
icon6.setImageResource(R.drawable.power);
socketConnection.writeouputstream(getString(R.string.icon6off));
icon6boolean = false;
}
break;
case R.id.icon7:
if (!icon7boolean) {
icon7.setImageResource(R.drawable.poweron);
socketConnection.writeouputstream(getString(R.string.icon7on));
icon7boolean = true;
} else {
icon7.setImageResource(R.drawable.power);
socketConnection.writeouputstream(getString(R.string.icon7off));
icon7boolean = false;
}
break;
case R.id.icon8:
if (!icon8boolean) {
icon8.setImageResource(R.drawable.poweron);
socketConnection.writeouputstream(getString(R.string.icon8on));
icon8boolean = true;
} else {
icon8.setImageResource(R.drawable.power);
socketConnection.writeouputstream(getString(R.string.icon8off));
icon8boolean = false;
}
break;
}
}
}