TextSwitcher实现textview切换显示(公告内容切换)

公告内容切换

1

    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".test.TestActivity">

            android:id="@+id/textSwitcher1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

2

package com.ruhai.yibei.test;

import android.annotation.SuppressLint;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.widget.TextSwitcher;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ViewSwitcher;

import androidx.appcompat.app.AppCompatActivity;

import com.alibaba.fastjson.JSON;
import com.ruhai.yibei.Constant;
import com.ruhai.yibei.R;
import com.ruhai.yibei.bean.AnnouncementBean;

import org.xutils.common.Callback;
import org.xutils.http.RequestParams;
import org.xutils.x;

import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;

public class TestActivity extends AppCompatActivity {
    private TextSwitcher textSwitcher;
    List texts;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test3);
        textSwitcher = (TextSwitcher) findViewById(R.id.textSwitcher1);

        textSwitcher.setFactory(new ViewSwitcher.ViewFactory() {
            @Override
            public View makeView() {
                Log.e("wy", "makeView: ");
                TextView tv = new TextView(TestActivity.this);
                tv.setTextColor(Color.BLACK);
                return tv;
            }
        });
        texts = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            texts.add("循环....."+i);
        }
        textSwitcher.setText(texts.get(0));

        Timer  mTimer = new Timer();
        final int[] j = {0};
        mTimer.schedule(new TimerTask() {
            @Override
            public void run() {
//                        mHandler.sendEmptyMessage(1);
               runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        j[0]++;
                        textSwitcher.setText(texts.get(j[0]));

                    }
                });
            }
        }, 0, 3000);


    }
}

3
往往需要联网滚动显示公告内容

package com.ruhai.yibei.test;

import android.annotation.SuppressLint;
import android.graphics.Color;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.widget.TextSwitcher;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.ViewSwitcher;

import androidx.appcompat.app.AppCompatActivity;

import com.alibaba.fastjson.JSON;
import com.ruhai.yibei.Constant;
import com.ruhai.yibei.R;
import com.ruhai.yibei.bean.AnnouncementBean;

import org.xutils.common.Callback;
import org.xutils.http.RequestParams;
import org.xutils.x;

import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;

public class TestActivity extends AppCompatActivity {
    private TextSwitcher textSwitcher;
    List texts;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test3);
        textSwitcher = (TextSwitcher) findViewById(R.id.textSwitcher1);

        textSwitcher.setFactory(new ViewSwitcher.ViewFactory() {
            @Override
            public View makeView() {
                Log.e("wy", "makeView: ");
                TextView tv = new TextView(TestActivity.this);
                tv.setTextColor(Color.BLACK);
                return tv;
            }
        });
//        texts = new ArrayList<>();
//        for (int i = 0; i < 10; i++) {
//            texts.add("循环....."+i);
//        }
//        textSwitcher.setText(texts.get(0));

//        Timer  mTimer = new Timer();
//        final int[] j = {0};
//        mTimer.schedule(new TimerTask() {
//            @Override
//            public void run() {
                        mHandler.sendEmptyMessage(1);
//               runOnUiThread(new Runnable() {
//                    @Override
//                    public void run() {
//                        j[0]++;
//                        textSwitcher.setText(texts.get(j[0]));
//
//                    }
//                });
//            }
//        }, 3000, 3000);


        RequestParams params = new RequestParams(Constant.announcement);
        params.addHeader("Authorization", Constant.authorization);
        params.addHeader("language", "zh_CN");
        params.setAsJsonContent(true);
        x.http().get(params, new Callback.CommonCallback() {
            @SuppressLint("ResourceAsColor")
            @Override
            public void onSuccess(String result) {
                AnnouncementBean professionInfo = JSON.parseObject(result, AnnouncementBean.class);
                Log.e("wy", "getTitle: " + professionInfo.getData().get(0).getTitle());

                if (professionInfo.getCode().equals("00000000")) {
                    Timer mTimer1 = new Timer();
                    final int[] j = {0};
                    mTimer1.schedule(new TimerTask() {
                        @Override
                        public void run() {
//                        mHandler.sendEmptyMessage(1);
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    j[0]++;
                                    if (j[0] >= professionInfo.getData().size()) {
                                        j[0] = 0;
                                    }
                                    Log.e("wy", "127getTitle: " + professionInfo.getData().get(j[0]).getTitle());
                                    textSwitcher.setText(professionInfo.getData().get(j[0]).getTitle());

                                }
                            });
                        }
                    }, 3000, 3000);


                } else {
                    Toast.makeText(x.app(), professionInfo.getMsg(), Toast.LENGTH_LONG).show();
                }


            }

            @Override
            public void onError(Throwable ex, boolean isOnCallback) {
                Log.e("wy", "result: " + ex.getMessage());
            }

            @Override
            public void onCancelled(CancelledException cex) {
                Toast.makeText(x.app(), "cancelled", Toast.LENGTH_LONG).show();
            }

            @Override
            public void onFinished() {

            }
        });


    }
}

4 在fragment中会出现公告内容不显示问题，一定要对textView设置显示颜色

TextView tv = new TextView(TestActivity.this);
                tv.setTextColor(Color.BLACK);

5 没有颜色分析思路：看看textview有没有内容，打印其宽高 tv.getHeight()，如果有宽高，再设置其颜色