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MainActivity整个代码package com.example.day05_activityresult;import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.Button; pu

改变字体大小(整个activity) package com.example.day10_contextmenu;import android.os.Bundle; import android.app.Activity; import android.view.ContextMenu; import android.view.MenuInflater; import android.view.Me

public class MainActivity extends Activity implements OnClickListener{ private TextView tv; private RelativeLayout fa; private TextView find; private TextView sao; private TextView p

MainActivitypackage bwie.broadcastreceiverdemo;import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View;/** * 1.建一个类extends Br