android中的简单animation(一)shake

1.shake

animation_1.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical"
    android:padding="10dip"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"> 
    <TextView 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dip"
        android:text="@string/animation_1_instructions"
    />
    <EditText android:id="@+id/pw"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:clickable="true"
        android:singleLine="true"
        android:password="true"
    />
<Button android:id="@+id/login"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/googlelogin_login"
    />
</LinearLayout>

 shake.xml:(interpolator表示内插程序)

<?xml version="1.0" encoding="utf-8"?>
<translate xmlns:android="http://schemas.android.com/apk/res/android" 
    android:fromXDelta="0" 
    android:toXDelta="10" 
    android:duration="1000" 
    android:interpolator="@anim/cycle_7" />

 cycle_7.xml:(cycles循环次数)

<?xml version="1.0" encoding="utf-8"?>
<cycleInterpolator xmlns:android="http://schemas.android.com/apk/res/android" 
    android:cycles="7" />

Animation1.java:

import com.example.android.apis.R;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;

public class Animation1 extends Activity implements View.OnClickListener {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.animation_1);

        View loginButton = findViewById(R.id.login);
        loginButton.setOnClickListener(this);
    }

    public void onClick(View v) {
        Animation shake = AnimationUtils.loadAnimation(this, R.anim.shake);
        findViewById(R.id.pw).startAnimation(shake);
    }

}

效果如图，输入密码，点击“Login”之后，输入框将会在一秒钟之内左右摇晃7个周期。