TextSwitcher 简单用例

TextSwitcher 字面理解是文字交换器，是ViewSwitcher的子类，从ViewSwitcher来看，是View交换器，TextSwitcher继承自ViewSwitcher，显然是交换TextView。

点击缓慢出现文字

BaseActivity

package com.shaoxin.mytextswitcher;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;

/**
 * Created by shaoxin on 2016/12/4.
 */

public abstract class BaseActivity extends AppCompatActivity {
    public abstract void init();

    public abstract void listener();

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        init();
        listener();
    }
}

MainActivity

package com.shaoxin.mytextswitcher;

import android.os.Bundle;
import android.view.View;
import android.view.animation.AnimationUtils;
import android.widget.Button;
import android.widget.TextSwitcher;
import android.widget.TextView;
import android.widget.ViewSwitcher;

public class MainActivity extends BaseActivity {
    private TextSwitcher textswitcher;
    private Button btn;
    private ViewSwitcher.ViewFactory factory;

    @Override
    public void init() {
        setContentView(R.layout.activity_main);
        textswitcher = (TextSwitcher) findViewById(R.id.textswitcher);
        btn = (Button) findViewById(R.id.btn);
    }

    @Override
    public void listener() {
        factory = new ViewSwitcher.ViewFactory() {
            @Override
            public View makeView() {
                TextView textView = new TextView(MainActivity.this);
                textView.setTextSize(40);
                return textView;
            }
        };
        textswitcher.setFactory(factory);
        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                textswitcher.setInAnimation(AnimationUtils
                        .loadAnimation(MainActivity.this, android.R.anim.fade_in));
                textswitcher.setInAnimation(AnimationUtils
                        .loadAnimation(MainActivity.this, android.R.anim.fade_out));
                textswitcher.setText("hello");
            }
        });
    }

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

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.shaoxin.mytextswitcher.MainActivity">

    <Button
        android:id="@+id/btn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="点击出现" />

    <TextSwitcher
        android:id="@+id/textswitcher"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

</LinearLayout>