亂數與Toast類別

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public class MainActivity extends Activity {

private Button mbtnOK;
private String ShowStr[] = {
"心不專，做事難以成就。",
"發脾氣是短暫的發瘋。",
"把握當下，就是用心。",
"理直氣要和，得理要饒人。",
"平安是福，快樂是慧。"};
private int index;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

mbtnOK = (Button) findViewById(R.id.btnOK);
mbtnOK.setOnClickListener(mbtnOKOnClickListener);
}

private View.OnClickListener mbtnOKOnClickListener = new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
index = (int)(Math.random() * ShowStr.length);
Toast.makeText(MainActivity.this, ShowStr[index], Toast.LENGTH_SHORT).show();
}
};

}

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範例下載