Android逐字符显示文字动画

Android逐字符显示文字动画

java
public class MainActivity extends AppCompatActivity {
    private TextView textView;
    private String text = "Hello World!";
    private int index = 0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textView = findViewById(R.id.textView);
        animateText();
    }
    private void animateText() {
        final Handler handler = new Handler();
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
                textView.setText(text.substring(0, index++));
                if (index <= text.length()) {
                    handler.postDelayed(this, 200); // 设置每隔200毫秒显示下一个字符
                }
            }
        }, 200);
    }
}