我无法向我的应用程序中的下一个按钮添加功能。它应该在每次按下时更改文本。但是，就我而言，它所做的只是更改一次文本然后进入睡眠状态！我应该怎么办？我搜索了网站，但找不到任何方法！
Java代码！
package com.dreamgoogle.gihf;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.ImageButton;
import android.widget.TextView;
public class Quotes extends Activity {
ImageButton next;
ImageButton previous;
ImageButton copytext;
TextView q;
TextView nm;
String[] str;
int i;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_quotes);
varSet();
next.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int i = 0;
i = i + 1;
q.setText(str[i]);
}
});
}
private void varSet() {
next = (ImageButton) findViewById(R.id.next);
previous = (ImageButton) findViewById(R.id.previous);
copytext = (ImageButton) findViewById(R.id.copy);
q = (TextView) findViewById(R.id.quotes);
str = new String[] {
"In order to succeed, your desire for success should be greater than your fear of failure.",
"A successful man is one who can lay a firm foundation with the bricks others have thrown at him.",
"Success is not final, failure is not fatal: it is the courage to continue that counts.",
"Try not to become a man of success. Rather become a man of value.",
"Want Something? Go Get It!" };
};
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.quotes, menu);
return true;
}
}
布局文件
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/home"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".Quotes" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:text="@string/h1"
android:textAppearance="?android:attr/textAppearanceMedium" />
<TextView
android:id="@+id/quotes"
android:layout_width="300dp"
android:layout_height="250dp"
android:layout_centerInParent="true"
android:background="@android:color/transparent"
android:gravity="center_vertical|center_horizontal|top"
android:text="@string/h2"
android:textSize="12sp"
android:typeface="monospace" />
<ImageButton
android:id="@+id/previous"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/quotes"
android:layout_marginTop="14dp"
android:layout_toLeftOf="@+id/textView1"
android:background="@android:color/transparent"
android:contentDescription="@drawable/previous"
android:src="@drawable/previous" />
<ImageButton
android:id="@+id/next"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/previous"
android:layout_toRightOf="@+id/textView1"
android:background="@android:color/transparent"
android:contentDescription="@drawable/next"
android:src="@drawable/next" />
<ImageButton
android:id="@+id/copy"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/previous"
android:layout_centerHorizontal="true"
android:background="@android:color/transparent"
android:contentDescription="@drawable/copy"
android:src="@drawable/copy" />
<TextView
android:id="@+id/nm"
android:layout_width="20dp"
android:layout_height="wrap_content"
android:layout_above="@+id/quotes"
android:layout_centerHorizontal="true"
android:layout_marginBottom="18dp"
android:clickable="false"
android:ems="10"
android:text="@string/h3" />
</RelativeLayout>