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我有一個整型變量,我想在按下按鈕時更改它,但代碼不起作用。是說我應該把bpm設置爲final,但是當我這樣做時我不能增加它!在OnClickListener中更改整數值
Java代碼:
super.onCreate(savedInstanceState);
int bpm;
setContentView(R.layout.activity_metronome);
final Button plus = (Button) findViewById(R.id.tempop);
final Button minus = (Button) findViewById(R.id.tempom);
final Button confirm_tempo = (Button) findViewById(R.id.confirmtempo);
final TextView curbpm = (TextView) findViewById(R.id.curbpm);
bpm=60;
curbpm.setText("" + bpm);
plus.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
bpm++;
curbpm.setText(""+bpm);
}
});