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之前有看到有的应用具有跑马灯的效果,这里参考了一下网上的资源,进行的简单的设计,欢迎评价:
1.自定义类 MarqueTextView
package com.mo.view;
import android.content.Context;
import android.util.AttributeSet;
import android.widget.TextView;
public class MarqueTextView extends TextView {
public MarqueTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public MarqueTextView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MarqueTextView(Context context) {
super(context);
}
@Override
public boolean isFocused() {
return true;
}
}
2.ManiActivity 代码
package com.mo.view;
import com.example.marquetextview.R;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.TextView;
public class MainActivity extends Activity {
private MarqueTextView mMarque;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mMarque = (MarqueTextView) findViewById(R.id.tv_testMarque);
mMarque.setText(" "+"-Hi! I Miss You .I Miss You .I Miss You .I Miss You .I Miss You .-");
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
3.布局文件 /layout/activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:orientation="vertical"
android:gravity="center"
android:layout_height="match_parent" >
<com.mo.view.MarqueTextView
android:id="@+id/tv_testMarque"
android:singleLine="true"
addStatesFromChildren="true"
android:ellipsize="marquee"
android:gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
</LinearLayout>
补充:
Android系统中TextView实现跑马灯效果,必须具备以下几个条件:
1、android:ellipsize=”marquee”
2、TextView必须单行显示,测试发现 使用 android:maxLine="1" 是不支持的,建议使用 singleLine="true"
即内容必须超出TextView大小
3、TextView要获得焦点才能滚动