如何textView在運(yùn)行時(shí)根據(jù)變化創(chuàng)建不同數(shù)量的sinteger而不顯式實(shí)例化每個(gè)s的名稱textView？textView創(chuàng)建的每個(gè)都需要有一個(gè)參考，因?yàn)槲倚枰猳nClickListeners稍后應(yīng)用到每個(gè)。下面的代碼工作得很好，但是我沒(méi)有提到每個(gè)textViewfor onClickListeners： private void buildUI(){ int variable_int = 3; //this variable changes at run-time, set to 3 for this examplefor(int i = 1; i <= variable_int; i++){ TextView textView = (TextView) findViewById(this); textView.setVisibility(View.VISIBLE); textView.setText("my textview"); linLayout.addView(textView); }}我想到了一個(gè)解決方案，但java.lang.NumberFormatException在嘗試轉(zhuǎn)換R.id.box#為intfor時(shí)會(huì)產(chǎn)生異常findViewById()：protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_profile); //Create textViews in onCreate(). They are invisible by default TextView box1 = (TextView) findViewById(R.id.box1); TextView box2 = (TextView) findViewById(R.id.box2); TextView box3 = (TextView) findViewById(R.id.box3); TextView box4 = (TextView) findViewById(R.id.box4); TextView box5 = (TextView) findViewById(R.id.box5); buildUI(); }private void buildUI(){int variable_int = 3; //this variable changes at run-time, set to 3 for this examplefor(int i = 1; i <= variable_int; i++){ String x = "R.id.box"+i; int xx = Integer.parseInt(x); //java.lang.NumberFormatException ! TextView textView = (TextView) findViewById(xx); textView.setVisibility(View.VISIBLE); textView.setText("my textview"); linLayout.addView(textView); }}
2 回答
白豬掌柜的
TA貢獻(xiàn)1893條經(jīng)驗(yàn) 獲得超10個(gè)贊
您也許可以擁有一個(gè)TextViews數(shù)組，然后稍后對(duì)其進(jìn)行循環(huán)。
private TextView[] generatedViews;
private void generateViews(int size) {
this.generatedViews = new TextView[size];
for (int i = 0; i < size; ++i) {
TextView tv = new TextView(this);
...
generatedViews[i] = tv;
}
}
private void assignListeners() {
for (TextView tv : generatedViews) {
tv.setOnClickListener(...);
}
}
呼如林
TA貢獻(xiàn)1798條經(jīng)驗(yàn) 獲得超3個(gè)贊
你也可以在創(chuàng)建 TextView 的同時(shí)創(chuàng)建一個(gè)事件
for(int i = 1; i <= variable_int; i++){
TextView textView = (TextView) findViewById(this);
textView.setVisibility(View.VISIBLE);
textView.setText("my textview");
**textView.setOnClickListener(....);**
linLayout.addView(textView);
}
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